Merge branch 'lodel2-datahandlers'

configure.ac

@@ -12,6 +12,8 @@ AC_CONFIG_FILES([Makefile \
 		lodel/leapi/datahandlers/Makefile \
 	lodel/plugin/Makefile \
 	lodel/settings/Makefile \
+	lodel/validator/Makefile \
+	lodel/mlnamedobject/Makefile \
 	lodel/utils/Makefile \
 	progs/Makefile \
 	progs/slim/Makefile \

editorial_models/em_simple.py

@@ -272,7 +272,7 @@ article.new_field(  'author_note',
                     group = editorial_group,
                     data_handler = 'text'
 )
-# Classe Review 
+# Classe Review
 review = em.new_class( 'review',
                         display_name = 'Review',
                         group = editorial_group,
@@ -439,7 +439,7 @@ issue.new_field(    'print_pub_date',
                     },
                   data_handler = 'datetime',
                   group = editorial_group,
-)     
+)
 issue.new_field(    'e_pub_date',
                     display_name = {
                         'eng': 'Electronic publication date',
@@ -447,7 +447,7 @@ issue.new_field(    'e_pub_date',
                     },
                   data_handler = 'datetime',
                   group = editorial_group,
-)  
+)
 issue.new_field(    'abstract',
                     display_name = {
                         'eng': 'Abstract',
@@ -455,7 +455,7 @@ issue.new_field(    'abstract',
                     },
                   data_handler = 'text',
                   group = editorial_group,
-) 
+)
 issue.new_field(    'collection',
                     display_name = {
                         'eng': 'Collection',
@@ -691,7 +691,7 @@ user.new_field(
     group = user_group, data_handler = 'password', internal = False)
 
 
-#em.save('xmlfile', filename = 'examples/em_test.xml')
+em.save('xmlfile', filename = 'editorial_models/em_simple.xml')
 pickle_file = 'examples/em_simple.pickle'
 em.save('picklefile', filename = pickle_file)
 print("Output written in %s" % pickle_file)

lodel/Makefile.am

@@ -1,4 +1,4 @@
-SUBDIRS=auth editorial_model leapi plugin settings utils plugins
+SUBDIRS=auth editorial_model leapi plugin settings utils plugins validator mlnamedobject
 EXTRA_DIST = plugins
 lodel_PYTHON = *.py
 CLEANFILES = buildconf.py

lodel/editorial_model/components.py

@@ -1,6 +1,6 @@
 #-*- coding: utf-8 -*-
 
-##@package lodel.editorial_model.components
+# @package lodel.editorial_model.components
 #@brief Defines all @ref lodel2_em "EM" components
 #@ingroup lodel2_em
 
@@ -12,28 +12,30 @@ import hashlib
 from lodel.context import LodelContext
 LodelContext.expose_modules(globals(), {
     'lodel.utils.mlstring': ['MlString'],
+    'lodel.mlnamedobject.mlnamedobject': ['MlNamedObject'],
     'lodel.settings': ['Settings'],
     'lodel.editorial_model.exceptions': ['EditorialModelError', 'assert_edit'],
     'lodel.leapi.leobject': ['CLASS_ID_FIELDNAME']})
 
-##@brief Abstract class to represent editorial model components
+# @brief Abstract class to represent editorial model components
 # @see EmClass EmField
 # @todo forbid '.' in uid
 #@ingroup lodel2_em
-class EmComponent(object):
-    
-    ##@brief Instanciate an EmComponent
+
+
+class EmComponent(MlNamedObject):
+
+    # @brief Instanciate an EmComponent
     # @param uid str : uniq identifier
     # @param display_name MlString|str|dict : component display_name
     # @param help_text MlString|str|dict : help_text
-    def __init__(self, uid, display_name = None, help_text = None, group = None):
+    def __init__(self, uid, display_name=None, help_text=None, group=None):
         if self.__class__ == EmComponent:
             raise NotImplementedError('EmComponent is an abstract class')
         self.uid = uid
-        self.display_name = None if display_name is None else MlString(display_name)
-        self.help_text = None if help_text is None else MlString(help_text)
         self.group = group
-    
+        super().__init__(display_name, help_text)
+
     def __str__(self):
         if self.display_name is None:
             return str(self.uid)
@@ -42,34 +44,34 @@ class EmComponent(object):
     def d_hash(self):
         m = hashlib.md5()
         for data in (
-                        self.uid,
-                        'NODISPNAME' if self.display_name is None else str(self.display_name.d_hash()),
-                        'NOHELP' if self.help_text is None else str(self.help_text.d_hash()),
-                        'NOGROUP' if self.group is None else str(self.group.d_hash()),
+            self.uid,
+            'NODISPNAME' if self.display_name is None else str(self.display_name.d_hash()),
+            'NOHELP' if self.help_text is None else str(self.help_text.d_hash()),
+            'NOGROUP' if self.group is None else str(self.group.d_hash()),
         ):
             m.update(bytes(data, 'utf-8'))
         return int.from_bytes(m.digest(), byteorder='big')
 
 
-##@brief Handles editorial model objects classes
+# @brief Handles editorial model objects classes
 #@ingroup lodel2_em
 class EmClass(EmComponent):
-    
-    ##@brief Instanciate a new EmClass
+
+    # @brief Instanciate a new EmClass
     #@param uid str : uniq identifier
     #@param display_name MlString|str|dict : component display_name
     #@param abstract bool : set the class as asbtract if True
     #@param pure_abstract bool : if True the EmClass will not be represented in
-    #leapi dyncode
+    # leapi dyncode
     #@param parents list: parent EmClass list or uid list
     #@param help_text MlString|str|dict : help_text
-    #@param datasources str|tuple|list : The datasource name ( see 
+    #@param datasources str|tuple|list : The datasource name ( see
     #@ref lodel2_datasources ) or two names (first is read_only datasource the
-    #second is read write)
+    # second is read write)
     def __init__(
-        self, uid, display_name = None, help_text = None, abstract = False,
-        parents = None, group = None, pure_abstract = False,
-        datasources = 'default'):
+            self, uid, display_name=None, help_text=None, abstract=False,
+            parents=None, group=None, pure_abstract=False,
+            datasources='default'):
 
         super().__init__(uid, display_name, help_text, group)
         self.abstract = bool(abstract)
@@ -85,49 +87,50 @@ class EmClass(EmComponent):
                 parents = [parents]
             for parent in parents:
                 if not isinstance(parent, EmClass):
-                    raise ValueError("<class EmClass> expected in parents list, but %s found" % type(parent))
+                    raise ValueError(
+                        "<class EmClass> expected in parents list, but %s found" % type(parent))
         else:
             parents = list()
         self.parents = parents
-        ##@brief Stores EmFields instances indexed by field uid
-        self.__fields = dict() 
-        
+        # @brief Stores EmFields instances indexed by field uid
+        self.__fields = dict()
+
         self.group = group
         if group is None:
             warnings.warn("NO GROUP FOR EMCLASS %s" % uid)
         else:
             group.add_components([self])
-    
-        #Adding common field
+
+        # Adding common field
         if not self.abstract:
             self.new_field(
                 CLASS_ID_FIELDNAME,
-                display_name = {
+                display_name={
                     'eng': "LeObject subclass identifier",
                     'fre': "Identifiant de la class fille de LeObject"},
-                help_text = {
+                help_text={
                     'eng': "Allow to create instance of the good class when\
  fetching arbitrary datas from DB"},
-                data_handler = 'LeobjectSubclassIdentifier',
-                internal = True,
-                group = group)
+                data_handler='LeobjectSubclassIdentifier',
+                internal=True,
+                group=group)
 
-    ##@brief Property that represent a dict of all fields (the EmField defined in this class and all its parents)
+    # @brief Property that represent a dict of all fields (the EmField defined in this class and all its parents)
     # @todo use Settings.editorialmodel.groups to determine wich fields should be returned
     @property
     def __all_fields(self):
         res = dict()
-        for pfields in [ p.__all_fields for p in self.parents]:
+        for pfields in [p.__all_fields for p in self.parents]:
             res.update(pfields)
         res.update(self.__fields)
         return res
-    
-    ##@brief RO access to datasource attribute
+
+    # @brief RO access to datasource attribute
     @property
     def datasource(self):
         return self.__datasource
 
-    ##@brief Return the list of all dependencies
+    # @brief Return the list of all dependencies
     #
     # Reccursive parents listing
     @property
@@ -140,29 +143,29 @@ class EmClass(EmComponent):
             res |= parent.parents_recc
         return res
 
-    ##@brief EmField getter
+    # @brief EmField getter
     # @param uid None | str : If None returns an iterator on EmField instances else return an EmField instance
     # @param no_parents bool : If True returns only fields defined is this class and not the one defined in parents classes
     # @return A list on EmFields instances (if uid is None) else return an EmField instance
     # @todo use Settings.editorialmodel.groups to determine wich fields should be returned
-    def fields(self, uid = None, no_parents = False):
+    def fields(self, uid=None, no_parents=False):
         fields = self.__fields if no_parents else self.__all_fields
         try:
             return list(fields.values()) if uid is None else fields[uid]
         except KeyError:
             raise EditorialModelError("No such EmField '%s'" % uid)
-    
-    ##@brief Keep in __fields only fields contained in active groups
+
+    # @brief Keep in __fields only fields contained in active groups
     def _set_active_fields(self, active_groups):
         if not Settings.editorialmodel.editormode:
             active_fields = []
             for grp_name, agrp in active_groups.items():
-                active_fields += [ emc for emc in agrp.components()
-                    if isinstance(emc, EmField)]
-            self.__fields = { fname:fdh for fname, fdh in self.__fields.items()
-                if fdh in active_fields }
+                active_fields += [emc for emc in agrp.components()
+                                  if isinstance(emc, EmField)]
+            self.__fields = {fname: fdh for fname, fdh in self.__fields.items()
+                             if fdh in active_fields}
 
-    ##@brief Add a field to the EmClass
+    # @brief Add a field to the EmClass
     # @param emfield EmField : an EmField instance
     # @warning do not add an EmField allready in another class !
     # @throw EditorialModelException if an EmField with same uid allready in this EmClass (overwritting allowed from parents)
@@ -170,38 +173,40 @@ class EmClass(EmComponent):
     def add_field(self, emfield):
         assert_edit()
         if emfield.uid in self.__fields:
-            raise EditorialModelError("Duplicated uid '%s' for EmField in this class ( %s )" % (emfield.uid, self))
+            raise EditorialModelError(
+                "Duplicated uid '%s' for EmField in this class ( %s )" % (emfield.uid, self))
         # Incomplete field override check
         if emfield.uid in self.__all_fields:
             parent_field = self.__all_fields[emfield.uid]
             if not emfield.data_handler_instance.can_override(parent_field.data_handler_instance):
-                raise AttributeError("'%s' field override a parent field, but data_handles are not compatible" % emfield.uid)
+                raise AttributeError(
+                    "'%s' field override a parent field, but data_handles are not compatible" % emfield.uid)
         self.__fields[emfield.uid] = emfield
         return emfield
-    
-    ##@brief Create a new EmField and add it to the EmClass
+
+    # @brief Create a new EmField and add it to the EmClass
     # @param data_handler str : A DataHandler name
     # @param uid str : the EmField uniq id
-    # @param **field_kwargs :  EmField constructor parameters ( see @ref EmField.__init__() ) 
+    # @param **field_kwargs :  EmField constructor parameters ( see @ref EmField.__init__() )
     def new_field(self, uid, data_handler, **field_kwargs):
         assert_edit()
         return self.add_field(EmField(uid, data_handler, self, **field_kwargs))
 
     def d_hash(self):
         m = hashlib.md5()
-        payload = str(super().d_hash())  + ("1" if self.abstract else "0") 
+        payload = str(super().d_hash()) + ("1" if self.abstract else "0")
 
         for p in sorted(self.parents):
             payload += str(p.d_hash())
         for fuid in sorted(self.__fields.keys()):
             payload += str(self.__fields[fuid].d_hash())
-            
+
         m.update(bytes(payload, 'utf-8'))
         return int.from_bytes(m.digest(), byteorder='big')
 
     def __str__(self):
         return "<class EmClass %s>" % self.uid
-    
+
     def __repr__(self):
         if not self.abstract:
             abstract = ''
@@ -209,94 +214,95 @@ class EmClass(EmComponent):
             abstract = 'PureAbstract'
         else:
             abstract = 'Abstract'
-        return "<class %s EmClass uid=%s>" % (abstract, repr(self.uid) )
+        return "<class %s EmClass uid=%s>" % (abstract, repr(self.uid))
 
 
-##@brief Handles editorial model classes fields
+# @brief Handles editorial model classes fields
 #@ingroup lodel2_em
 class EmField(EmComponent):
 
-    ##@brief Instanciate a new EmField
+    # @brief Instanciate a new EmField
     # @param uid str : uniq identifier
     # @param display_name MlString|str|dict : field display_name
     # @param data_handler str : A DataHandler name
     # @param help_text MlString|str|dict : help text
     # @param group EmGroup :
     # @param **handler_kwargs : data handler arguments
-    def __init__(self, uid, data_handler, em_class = None, display_name = None, help_text = None, group = None, **handler_kwargs):
+    def __init__(self, uid, data_handler, em_class=None, display_name=None, help_text=None, group=None, **handler_kwargs):
         from lodel.leapi.datahandlers.base_classes import DataHandler
         super().__init__(uid, display_name, help_text, group)
-        ##@brief The data handler name
+        # @brief The data handler name
         self.data_handler_name = data_handler
-        ##@brief The data handler class
+        # @brief The data handler class
         self.data_handler_cls = DataHandler.from_name(data_handler)
-        ##@brief The data handler instance associated with this EmField
+        # @brief The data handler instance associated with this EmField
         self.data_handler_instance = self.data_handler_cls(**handler_kwargs)
-        ##@brief Stores data handler instanciation options
+        # @brief Stores data handler instanciation options
         self.data_handler_options = handler_kwargs
-        ##@brief Stores the emclass that contains this field (set by EmClass.add_field() method)
+        # @brief Stores the emclass that contains this field (set by EmClass.add_field() method)
         self._emclass = em_class
         if self._emclass is None:
-            warnings.warn("No EmClass for field %s" %uid)
+            warnings.warn("No EmClass for field %s" % uid)
         if group is None:
             warnings.warn("No EmGroup for field  %s" % uid)
         else:
             group.add_components([self])
 
-    ##@brief Returns data_handler_name attribute
+    # @brief Returns data_handler_name attribute
     def get_data_handler_name(self):
         return copy.copy(self.data_handler_name)
-        
-    ##@brief Returns data_handler_cls attribute
+
+    # @brief Returns data_handler_cls attribute
     def get_data_handler_cls(self):
-        return copy.copy(selfdata_handler_cls)
-    
+        return copy.copy(self.data_handler_cls)
+
     ##@brief Returne the uid of the emclass which contains this field
     def get_emclass_uid(self):
         return self._emclass.uid
-    
+
     # @warning Not complete !
     # @todo Complete the hash when data handlers becomes available
     def d_hash(self):
         return int.from_bytes(hashlib.md5(
-                        bytes(
-                                "%s%s%s" % (  super().d_hash(),
-                                            self.data_handler_name,
-                                            self.data_handler_options), 
-                                'utf-8')
+            bytes(
+                "%s%s%s" % (super().d_hash(),
+                            self.data_handler_name,
+                            self.data_handler_options),
+                'utf-8')
         ).digest(), byteorder='big')
 
-##@brief Handles functionnal group of EmComponents
+# @brief Handles functionnal group of EmComponents
 #@ingroup lodel2_em
-class EmGroup(object):
-        
-    ##@brief Create a new EmGroup
+
+
+class EmGroup(MlNamedObject):
+
+    # @brief Create a new EmGroup
     # @note you should NEVER call the constructor yourself. Use Model.add_group instead
     # @param uid str : Uniq identifier
     # @param depends list : A list of EmGroup dependencies
-    # @param display_name MlString|str : 
-    # @param help_text MlString|str : 
-    def __init__(self, uid, depends = None, display_name = None, help_text = None):
+    # @param display_name MlString|str :
+    # @param help_text MlString|str :
+    def __init__(self, uid, depends=None, display_name=None, help_text=None):
         self.uid = uid
-        ##@brief Stores the list of groups that depends on this EmGroup indexed by uid
+        # @brief Stores the list of groups that depends on this EmGroup indexed by uid
         self.required_by = dict()
-        ##@brief Stores the list of dependencies (EmGroup) indexed by uid
+        # @brief Stores the list of dependencies (EmGroup) indexed by uid
         self.require = dict()
-        ##@brief Stores the list of EmComponent instances contained in this group
+        # @brief Stores the list of EmComponent instances contained in this group
         self.__components = set()
+        super().__init__(display_name, help_text)
 
-        self.display_name = None if display_name is None else MlString(display_name)
-        self.help_text = None if help_text is None else MlString(help_text)
         if depends is not None:
             for grp in depends:
                 if not isinstance(grp, EmGroup):
                     raise ValueError("EmGroup expected in depends argument but %s found" % grp)
                 self.add_dependencie(grp)
-    
-    ##@brief Returns EmGroup dependencie
+
+    # @brief Returns EmGroup dependencie
     # @param recursive bool : if True return all dependencies and their dependencies
     # @return a dict of EmGroup identified by uid
-    def dependencies(self, recursive = False):
+    def dependencies(self, recursive=False):
         res = copy.copy(self.require)
         if not recursive:
             return res
@@ -308,11 +314,11 @@ class EmGroup(object):
                     to_scan.append(new_dep)
                     res[new_dep.uid] = new_dep
         return res
-    
-    ##@brief Returns EmGroup applicants
+
+    # @brief Returns EmGroup applicants
     # @param recursive bool : if True return all dependencies and their dependencies
     # @returns a dict of EmGroup identified by uid
-    def applicants(self, recursive = False):
+    def applicants(self, recursive=False):
         res = copy.copy(self.required_by)
         if not recursive:
             return res
@@ -324,29 +330,31 @@ class EmGroup(object):
                     to_scan.append(new_app)
                     res[new_app.uid] = new_app
         return res
-    
-    ##@brief Returns EmGroup components
+
+    # @brief Returns EmGroup components
     # @returns a copy of the set of components
     def components(self):
         return (self.__components).copy()
 
-    ##@brief Returns EmGroup display_name
+    # @brief Returns EmGroup display_name
     #  @param lang str | None : If None return default lang translation
     #  @returns None if display_name is None, a str for display_name else
     def get_display_name(self, lang=None):
-        name=self.display_name
-        if name is None : return None
-        return name.get(lang);
+        name = self.display_name
+        if name is None:
+            return None
+        return name.get(lang)
 
-    ##@brief Returns EmGroup help_text
+    # @brief Returns EmGroup help_text
     #  @param lang str | None : If None return default lang translation
     #  @returns None if display_name is None, a str for display_name else
     def get_help_text(self, lang=None):
-        help=self.help_text
-        if help is None : return None
-        return help.get(lang);
-    
-    ##@brief Add components in a group
+        help = self.help_text
+        if help is None:
+            return None
+        return help.get(lang)
+
+    # @brief Add components in a group
     # @param components list : EmComponent instances list
     def add_components(self, components):
         assert_edit()
@@ -357,10 +365,11 @@ class EmGroup(object):
                     msg %= (component, self)
                     warnings.warn(msg)
             elif not isinstance(component, EmClass):
-                raise EditorialModelError("Expecting components to be a list of EmComponent, but %s found in the list" % type(component))
+                raise EditorialModelError(
+                    "Expecting components to be a list of EmComponent, but %s found in the list" % type(component))
         self.__components |= set(components)
 
-    ##@brief Add a dependencie
+    # @brief Add a dependencie
     # @param em_group EmGroup|iterable : an EmGroup instance or list of instance
     def add_dependencie(self, grp):
         assert_edit()
@@ -368,16 +377,17 @@ class EmGroup(object):
             for group in grp:
                 self.add_dependencie(group)
             return
-        except TypeError: pass
-                
+        except TypeError:
+            pass
+
         if grp.uid in self.require:
             return
         if self.__circular_dependencie(grp):
             raise EditorialModelError("Circular dependencie detected, cannot add dependencie")
         self.require[grp.uid] = grp
         grp.required_by[self.uid] = self
-        
-    ##@brief Add a applicant
+
+    # @brief Add a applicant
     # @param em_group EmGroup|iterable : an EmGroup instance or list of instance
     # Useless ???
     def add_applicant(self, grp):
@@ -386,26 +396,27 @@ class EmGroup(object):
             for group in grp:
                 self.add_applicant(group)
             return
-        except TypeError: pass
-                
+        except TypeError:
+            pass
+
         if grp.uid in self.required_by:
             return
         if self.__circular_applicant(grp):
             raise EditorialModelError("Circular applicant detected, cannot add applicant")
         self.required_by[grp.uid] = grp
         grp.require[self.uid] = self
-    
-    ##@brief Search for circular dependencie
+
+    # @brief Search for circular dependencie
     # @return True if circular dep found else False
     def __circular_dependencie(self, new_dep):
         return self.uid in new_dep.dependencies(True)
-    
-    ##@brief Search for circular applicant
+
+    # @brief Search for circular applicant
     # @return True if circular app found else False
     def __circular_applicant(self, new_app):
         return self.uid in new_app.applicants(True)
 
-    ##@brief Fancy string representation of an EmGroup
+    # @brief Fancy string representation of an EmGroup
     # @return a string
     def __str__(self):
         if self.display_name is None:
@@ -414,11 +425,11 @@ class EmGroup(object):
             return self.display_name.get()
 
     def d_hash(self):
-        
+
         payload = "%s%s%s" % (
-                                self.uid,
-                                'NODNAME' if self.display_name is None else self.display_name.d_hash(),
-                                'NOHELP' if self.help_text is None else self.help_text.d_hash()
+            self.uid,
+            'NODNAME' if self.display_name is None else self.display_name.d_hash(),
+            'NOHELP' if self.help_text is None else self.help_text.d_hash()
         )
         for recurs in (False, True):
             deps = self.dependencies(recurs)
@@ -427,11 +438,11 @@ class EmGroup(object):
         for req_by_uid in self.required_by:
             payload += req_by_uid
         return int.from_bytes(
-                                bytes(payload, 'utf-8'),
-                                byteorder = 'big'
+            bytes(payload, 'utf-8'),
+            byteorder='big'
         )
-    
-    ##@brief Complete string representation of an EmGroup
+
+    # @brief Complete string representation of an EmGroup
     # @return a string
     def __repr__(self):
-        return "<class EmGroup '%s' depends : [%s]>" % (self.uid, ', '.join([duid for duid in self.dependencies(False)]) )
+        return "<class EmGroup '%s' depends : [%s]>" % (self.uid, ', '.join([duid for duid in self.dependencies(False)]))

lodel/editorial_model/model.py

@@ -7,6 +7,7 @@ import copy
 from lodel.context import LodelContext
 LodelContext.expose_modules(globals(), {
     'lodel.utils.mlstring': ['MlString'],
+    'lodel.mlnamedobject.mlnamedobject': ['MlNamedObject'],
     'lodel.logger': 'logger',
     'lodel.settings': ['Settings'],
     'lodel.settings.utils': ['SettingsError'],
@@ -14,29 +15,34 @@ LodelContext.expose_modules(globals(), {
     'lodel.editorial_model.components': ['EmClass', 'EmField', 'EmGroup']})
 
 
-##@brief Describe an editorial model
+# @brief Describe an editorial model
 #@ingroup lodel2_em
-class EditorialModel(object):
-    
-    ##@brief Create a new editorial model
+class EditorialModel(MlNamedObject):
+
+    # @brief Create a new editorial model
     # @param name MlString|str|dict : the editorial model name
     # @param description MlString|str|dict : the editorial model description
-    def __init__(self, name, description = None):
+    def __init__(self, name, description=None, display_name=None, help_text=None):
         self.name = MlString(name)
         self.description = MlString(description)
-        ##@brief Stores all groups indexed by id
+        # @brief Stores all groups indexed by id
         self.__groups = dict()
-        ##@brief Stores all classes indexed by id
+        # @brief Stores all classes indexed by id
         self.__classes = dict()
-        ## @brief Stores all activated groups indexed by id
+        #  @brief Stores all activated groups indexed by id
         self.__active_groups = dict()
-        ## @brief Stores all activated classes indexed by id
+        #  @brief Stores all activated classes indexed by id
         self.__active_classes = dict()
         self.__set_actives()
-    
-    ##@brief EmClass uids accessor
+        if display_name is None:
+            display_name = name
+        if help_text is None:
+            help_text = description
+        super().__init__(display_name, help_text)
+
+    # @brief EmClass uids accessor
     #@return a dict of emclasses
-    def all_classes(self, uid = None):
+    def all_classes(self, uid=None):
         if uid is None:
             return copy.copy(self.__classes)
         else:
@@ -44,8 +50,8 @@ class EditorialModel(object):
                 return copy.copy(self.__classes[uid])
             except KeyError:
                 raise EditorialModelException("EmClass not found : '%s'" % uid)
-                
-    def all_classes_ref(self, uid = None):
+
+    def all_classes_ref(self, uid=None):
         if uid is None:
             return self.__classes
         else:
@@ -53,16 +59,15 @@ class EditorialModel(object):
                 return self.__classes[uid]
             except KeyError:
                 raise EditorialModelException("EmGroup not found : '%s'" % uid)
-                                
-    ##@brief active EmClass uids accessor
+
+    # @brief active EmClass uids accessor
     #@return a list of class uids
     def active_classes_uids(self):
-            return list(self.__active_classes.keys())
-        
-    
-    ##@brief EmGroups accessor
+        return list(self.__active_classes.keys())
+
+    # @brief EmGroups accessor
     #@return a dict of groups
-    def all_groups(self, uid = None):
+    def all_groups(self, uid=None):
         if uid is None:
             return copy.copy(self.__groups)
         else:
@@ -70,10 +75,10 @@ class EditorialModel(object):
                 return copy.copy(self.__groups[uid])
             except KeyError:
                 raise EditorialModelException("EmGroup not found : '%s'" % uid)
-    
-    ##@brief EmGroups accessor
+
+    # @brief EmGroups accessor
     #@return a dict of groups
-    def all_groups_ref(self, uid = None):
+    def all_groups_ref(self, uid=None):
         if uid is None:
             return self.__groups
         else:
@@ -81,26 +86,26 @@ class EditorialModel(object):
                 return self.__groups[uid]
             except KeyError:
                 raise EditorialModelException("EmGroup not found : '%s'" % uid)
-                
-    ##@brief active EmClass uids accessor
+
+    # @brief active EmClass uids accessor
     #@return a list of class uids
     def active_groups_uids(self):
-            return list(self.__active_groups.keys())
+        return list(self.__active_groups.keys())
 
-    ##@brief EmClass accessor
+    # @brief EmClass accessor
     #@param uid None | str : give this argument to get a specific EmClass
     #@return if uid is given returns an EmClass else returns an EmClass
     # iterator
     #@todo use Settings.editorialmodel.groups to determine wich classes should
     # be returned
-    def classes(self, uid = None):
+    def classes(self, uid=None):
         try:
-            return self.__elt_getter(   self.__active_classes,
-                                        uid)
+            return self.__elt_getter(self.__active_classes,
+                                     uid)
         except KeyError:
             raise EditorialModelException("EmClass not found : '%s'" % uid)
-    
-    ##@brief EmClass child list accessor
+
+    # @brief EmClass child list accessor
     #@param uid str : the EmClass uid
     #@return a set of EmClass
     def get_class_childs(self, uid):
@@ -111,24 +116,23 @@ class EditorialModel(object):
                 res.append(cls)
         return set(res)
 
-
-    ##@brief EmGroup getter
+    # @brief EmGroup getter
     # @param uid None | str : give this argument to get a specific EmGroup
     # @return if uid is given returns an EmGroup else returns an EmGroup iterator
-    def groups(self, uid = None):
+    def groups(self, uid=None):
         try:
-            return self.__elt_getter(   self.__active_groups,
-                                        uid)
+            return self.__elt_getter(self.__active_groups,
+                                     uid)
         except KeyError:
             raise EditorialModelException("EmGroup not found : '%s'" % uid)
-    
-    ##@brief Private getter for __groups or __classes
+
+    # @brief Private getter for __groups or __classes
     # @see classes() groups()
     def __elt_getter(self, elts, uid):
         return list(elts.values()) if uid is None else elts[uid]
-    
-    ##@brief Update the EditorialModel.__active_groups and
-    #EditorialModel.__active_classes attibutes
+
+    # @brief Update the EditorialModel.__active_groups and
+    # EditorialModel.__active_classes attibutes
     def __set_actives(self):
         if Settings.editorialmodel.editormode:
             logger.warning("All EM groups active because editormode in ON")
@@ -136,7 +140,7 @@ class EditorialModel(object):
             self.__active_groups = self.__groups
             self.__active_classes = self.__classes
         else:
-            #determine groups first
+            # determine groups first
             self.__active_groups = dict()
             self.__active_classes = dict()
             for agrp in Settings.editorialmodel.groups:
@@ -153,13 +157,13 @@ class EditorialModel(object):
                 raise RuntimeError("No active class found. Abording")
             for clsname, acls in self.__active_classes.items():
                 acls._set_active_fields(self.__active_groups)
-    
-    ##@brief EmField getter
+
+    # @brief EmField getter
     # @param uid str : An EmField uid represented by "CLASSUID.FIELDUID"
     # @return Fals or an EmField instance
     #
     # @todo delete it, useless...
-    def field(self, uid = None):
+    def field(self, uid=None):
         spl = uid.split('.')
         if len(spl) != 2:
             raise ValueError("Malformed EmField identifier : '%s'" % uid)
@@ -175,7 +179,7 @@ class EditorialModel(object):
             pass
         return False
 
-    ##@brief Add a class to the editorial model
+    # @brief Add a class to the editorial model
     # @param emclass EmClass : the EmClass instance to add
     # @return emclass
     def add_class(self, emclass):
@@ -187,7 +191,7 @@ class EditorialModel(object):
         self.__classes[emclass.uid] = emclass
         return emclass
 
-    ##@brief Add a group to the editorial model
+    # @brief Add a group to the editorial model
     # @param emgroup EmGroup : the EmGroup instance to add
     # @return emgroup
     def add_group(self, emgroup):
@@ -199,15 +203,15 @@ class EditorialModel(object):
         self.__groups[emgroup.uid] = emgroup
         return emgroup
 
-    ##@brief Add a new EmClass to the editorial model
+    # @brief Add a new EmClass to the editorial model
     #@param uid str : EmClass uid
-    #@param **kwargs : EmClass constructor options ( 
+    #@param **kwargs : EmClass constructor options (
     # see @ref lodel.editorial_model.component.EmClass.__init__() )
     def new_class(self, uid, **kwargs):
         assert_edit()
         return self.add_class(EmClass(uid, **kwargs))
-    
-    ##@brief Add a new EmGroup to the editorial model
+
+    # @brief Add a new EmGroup to the editorial model
     #@param uid str : EmGroup uid
     #@param *kwargs : EmGroup constructor keywords arguments (
     # see @ref lodel.editorial_model.component.EmGroup.__init__() )
@@ -215,7 +219,7 @@ class EditorialModel(object):
         assert_edit()
         return self.add_group(EmGroup(uid, **kwargs))
 
-    ##@brief Save a model
+    # @brief Save a model
     # @param translator module : The translator module to use
     # @param **translator_args
     def save(self, translator, **translator_kwargs):
@@ -223,14 +227,15 @@ class EditorialModel(object):
         if isinstance(translator, str):
             translator = self.translator_from_name(translator)
         return translator.save(self, **translator_kwargs)
-    
-    ##@brief Raise an error if lodel is not in EM edition mode
+
+    # @brief Raise an error if lodel is not in EM edition mode
     @staticmethod
     def raise_if_ro():
         if not Settings.editorialmodel.editormode:
-            raise EditorialModelError("Lodel in not in EM editor mode. The EM is in read only state")
+            raise EditorialModelError(
+                "Lodel in not in EM editor mode. The EM is in read only state")
 
-    ##@brief Load a model
+    # @brief Load a model
     # @param translator module : The translator module to use
     # @param **translator_args
     @classmethod
@@ -241,7 +246,7 @@ class EditorialModel(object):
         res.__set_actives()
         return res
 
-    ##@brief Return a translator module given a translator name
+    # @brief Return a translator module given a translator name
     # @param translator_name str : The translator name
     # @return the translator python module
     # @throw NameError if the translator does not exists
@@ -253,12 +258,12 @@ class EditorialModel(object):
         except ImportError:
             raise NameError("No translator named %s")
         return mod
-        
-    ##@brief Lodel hash
+
+    # @brief Lodel hash
     def d_hash(self):
         payload = "%s%s" % (
-                            self.name,
-                            'NODESC' if self.description is None else self.description.d_hash()
+            self.name,
+            'NODESC' if self.description is None else self.description.d_hash()
         )
         for guid in sorted(self.__groups):
             payload += str(self.__groups[guid].d_hash())
@@ -267,7 +272,6 @@ class EditorialModel(object):
             payload += str(self.__classes[cuid].d_hash())
 
         return int.from_bytes(
-                                hashlib.md5(bytes(payload, 'utf-8')).digest(),
-                                byteorder='big'
+            hashlib.md5(bytes(payload, 'utf-8')).digest(),
+            byteorder='big'
         )
-

lodel/leapi/datahandlers/base_classes.py

@@ -12,34 +12,51 @@ import warnings
 from lodel.context import LodelContext
 
 LodelContext.expose_modules(globals(), {
-    'lodel.exceptions': ['LodelException', 'LodelExceptions',
-        'LodelFatalError', 'DataNoneValid', 'FieldValidationError'],
-    'lodel.leapi.datahandlers.exceptions': ['LodelDataHandlerConsistencyException', 'LodelDataHandlerException'],
-    'lodel.logger': 'logger'})
-
-
-##@brief Base class for all data handlers
-#@ingroup lodel2_datahandlers
-class DataHandler(object):
+    'lodel.exceptions': [
+        'LodelException',
+        'LodelExceptions',
+        'LodelFatalError',
+        'DataNoneValid',
+        'FieldValidationError'
+    ],
+    'lodel.mlnamedobject.mlnamedobject': ['MlNamedObject'],
+    'lodel.leapi.datahandlers.exceptions': [
+        'LodelDataHandlerConsistencyException',
+        'LodelDataHandlerException'
+    ],
+    'lodel.validator.validator': [
+        'ValidationError'
+    ],
+    'lodel.logger': 'logger',
+    'lodel.utils.mlstring': ['MlString']})
+
+
+## @brief Base class for all data handlers
+# @ingroup lodel2_datahandlers
+class DataHandler(MlNamedObject):
     base_type = "type"
     _HANDLERS_MODULES = ('datas_base', 'datas', 'references')
-    ##@brief Stores the DataHandler childs classes indexed by name
+    ## @brief Stores the DataHandler childs classes indexed by name
     _base_handlers = None
-    ##@brief Stores custom datahandlers classes indexed by name
+    ## @brief Stores custom datahandlers classes indexed by name
     # @todo do it ! (like plugins, register handlers... blablabla)
     __custom_handlers = dict()
 
     help_text = 'Generic Field Data Handler'
+    display_name = "Generic Field"
+    options_spec = dict()
+    options_values = dict()
 
-    ##@brief List fields that will be exposed to the construct_data_method
+    ## @brief List fields that will be exposed to the construct_data_method
     _construct_datas_deps = []
 
     directly_editable = True
-    ##@brief constructor
+
+    ## @brief constructor
+    #
     # @param internal False | str : define whether or not a field is internal
-    # @param immutable bool : indicates if the fieldtype has to be defined in child classes of LeObject or if it is
-    #                         designed globally and immutable
-    # @param **args
+    # @param immutable bool : indicates if the fieldtype has to be defined in child classes of
+    #                         LeObject or if it is designed globally and immutable
     # @throw NotImplementedError if it is instanciated directly
     def __init__(self, **kwargs):
         if self.__class__ == DataHandler:
@@ -54,9 +71,30 @@ class DataHandler(object):
             self.default, error = self.check_data_value(kwargs['default'])
             if error:
                 raise error
-            del(kwargs['default'])
+            del kwargs['default']
         for argname, argval in kwargs.items():
             setattr(self, argname, argval)
+        self.check_options()
+
+        display_name = kwargs.get('display_name',MlString(self.display_name))
+        help_text = kwargs.get('help_text', MlString(self.help_text))
+        super().__init__(display_name, help_text)
+
+    ## @brief Sets properly casted and checked options for the datahandler
+    # @raises LodelDataHandlerNotAllowedOptionException when a passed option is not in the option
+    # specifications of the datahandler
+    def check_options(self):
+        for option_name, option_datas in self.options_spec.items():
+            if option_name in self.options_values:
+                # There is a configured option, we check its value
+                try:
+                    self.options_values[option_name] = option_datas[1].check_value(
+                        self.options_values[option_name])
+                except ValueError:
+                    pass  # TODO Deal with the case where the value used for an option is invalid
+            else:
+                # This option was not configured, we get the default value from the specs
+                self.options_values[option_name] = option_datas[0]
 
     ## Fieldtype name
     @classmethod
@@ -74,15 +112,15 @@ class DataHandler(object):
     def is_primary_key(self):
         return self.primary_key
 
-    ##@brief checks if a fieldtype is internal
+    ## @brief checks if a fieldtype is internal
     # @return bool
     def is_internal(self):
         return self.internal is not False
 
-    ##brief check if a value can be nullable
-    #@param value *
-    #@throw DataNoneValid if value is None and nullable. LodelExceptions if not nullable
-    #@return value (if not None)
+    ## @brief check if a value can be nullable
+    # @param value *
+    # @throw DataNoneValid if value is None and nullable. LodelExceptions if not nullable
+    # @return value (if not None)
     # @return value
     def _check_data_value(self, value):
         if value is None:
@@ -91,9 +129,9 @@ class DataHandler(object):
             raise DataNoneValid("None with a nullable. This exeption is allowed")
         return value
 
-    ##@brief calls the data_field (defined in derived class) _check_data_value() method
-    #@param value *
-    #@return tuple (value|None, None|error) value can be cast if NoneError
+    ## @brief calls the data_field (defined in derived class) _check_data_value() method
+    # @param value *
+    # @return tuple (value|None, None|error) value can be cast if NoneError
     def check_data_value(self, value):
         try:
             value = self._check_data_value(value)
@@ -103,7 +141,7 @@ class DataHandler(object):
             return None, expt
         return value, None
 
-    ##@brief checks if this class can override the given data handler
+    ## @brief checks if this class can override the given data handler
     # @param data_handler DataHandler
     # @return bool
     def can_override(self, data_handler):
@@ -111,17 +149,17 @@ class DataHandler(object):
             return False
         return True
 
-    ##@brief Build field value
-    #@ingroup lodel2_dh_checks
-    #@warning DO NOT REIMPLEMENT THIS METHOD IN A CUSTOM DATAHANDLER (see
-    #@ref _construct_data() and @ref lodel2_dh_check_impl )
-    #@param emcomponent EmComponent : An EmComponent child class instance
-    #@param fname str : The field name
-    #@param datas dict : dict storing fields values (from the component)
-    #@param cur_value : the value from the current field (identified by fieldname)
-    #@return the value
-    #@throw RunTimeError if data construction fails
-    #@todo raise something else
+    ## @brief Build field value
+    # @ingroup lodel2_dh_checks
+    # @warning DO NOT REIMPLEMENT THIS METHOD IN A CUSTOM DATAHANDLER (see
+    # @ref _construct_data() and @ref lodel2_dh_check_impl )
+    # @param emcomponent EmComponent : An EmComponent child class instance
+    # @param fname str : The field name
+    # @param datas dict : dict storing fields values (from the component)
+    # @param cur_value : the value from the current field (identified by fieldname)
+    # @return the value
+    # @throw RunTimeError if data construction fails
+    # @todo raise something else
     def construct_data(self, emcomponent, fname, datas, cur_value):
         emcomponent_fields = emcomponent.fields()
         data_handler = None
@@ -136,41 +174,41 @@ class DataHandler(object):
             new_val = None
         return self._construct_data(emcomponent, fname, datas, new_val)
 
-    ##@brief Designed to be reimplemented by child classes
-    #@param emcomponent EmComponent : An EmComponent child class instance
-    #@param fname str : The field name
-    #@param datas dict : dict storing fields values (from the component)
-    #@param cur_value : the value from the current field (identified by fieldname)
-    #@return the value
-    #@see construct_data() lodel2_dh_check_impl
+    ## @brief Designed to be reimplemented by child classes
+    # @param emcomponent EmComponent : An EmComponent child class instance
+    # @param fname str : The field name
+    # @param datas dict : dict storing fields values (from the component)
+    # @param cur_value : the value from the current field (identified by fieldname)
+    # @return the value
+    # @see construct_data() lodel2_dh_check_impl
     def _construct_data(self, empcomponent, fname, datas, cur_value):
         return cur_value
 
-    ##@brief Check datas consistency
-    #@ingroup lodel2_dh_checks
-    #@warning DO NOT REIMPLEMENT THIS METHOD IN A CUSTOM DATAHANDLER (see
-    #@ref _construct_data() and @ref lodel2_dh_check_impl )
-    #@warning the datas argument looks like a dict but is not a dict
-    #see @ref base_classes.DatasConstructor "DatasConstructor" and
-    #@ref lodel2_dh_datas_construction "Datas construction section"
-    #@param emcomponent EmComponent : An EmComponent child class instance
-    #@param fname : the field name
-    #@param datas dict : dict storing fields values
-    #@return an Exception instance if fails else True
-    #@todo A implémenter
+    ## @brief Check datas consistency
+    # @ingroup lodel2_dh_checks
+    # @warning DO NOT REIMPLEMENT THIS METHOD IN A CUSTOM DATAHANDLER (see
+    # @ref _construct_data() and @ref lodel2_dh_check_impl )
+    # @warning the datas argument looks like a dict but is not a dict
+    # see @ref base_classes.DatasConstructor "DatasConstructor" and
+    # @ref lodel2_dh_datas_construction "Datas construction section"
+    # @param emcomponent EmComponent : An EmComponent child class instance
+    # @param fname : the field name
+    # @param datas dict : dict storing fields values
+    # @return an Exception instance if fails else True
+    # @todo A implémenter
     def check_data_consistency(self, emcomponent, fname, datas):
         return self._check_data_consistency(emcomponent, fname, datas)
 
-    ##@brief Designed to be reimplemented by child classes
-    #@param emcomponent EmComponent : An EmComponent child class instance
-    #@param fname : the field name
-    #@param datas dict : dict storing fields values
-    #@return an Exception instance if fails else True
-    #@see check_data_consistency() lodel2_dh_check_impl
+    ## @brief Designed to be reimplemented by child classes
+    # @param emcomponent EmComponent : An EmComponent child class instance
+    # @param fname : the field name
+    # @param datas dict : dict storing fields values
+    # @return an Exception instance if fails else True
+    # @see check_data_consistency() lodel2_dh_check_impl
     def _check_data_consistency(self, emcomponent, fname, datas):
         return True
 
-    ##@brief make consistency after a query
+    ## @brief make consistency after a query
     # @param emcomponent EmComponent : An EmComponent child class instance
     # @param fname : the field name
     # @param datas dict : dict storing fields values
@@ -179,7 +217,7 @@ class DataHandler(object):
     def make_consistency(self, emcomponent, fname, datas):
         pass
 
-    ##@brief This method is use by plugins to register new data handlers
+    ## @brief This method is use by plugins to register new data handlers
     @classmethod
     def register_new_handler(cls, name, data_handler):
         if not inspect.isclass(data_handler):
@@ -188,7 +226,7 @@ class DataHandler(object):
             raise ValueError("A data handler HAS TO be a child class of DataHandler")
         cls.__custom_handlers[name] = data_handler
 
-    ##@brief Load all datahandlers
+    ## @brief Load all datahandlers
     @classmethod
     def load_base_handlers(cls):
         if cls._base_handlers is None:
@@ -201,10 +239,11 @@ class DataHandler(object):
                         cls._base_handlers[name.lower()] = obj
         return copy.copy(cls._base_handlers)
 
-    ##@brief given a field type name, returns the associated python class
+    ## @brief given a field type name, returns the associated python class
     # @param fieldtype_name str : A field type name (not case sensitive)
     # @return DataField child class
-    # @note To access custom data handlers it can be cool to prefix the handler name by plugin name for example ? (to ensure name unicity)
+    # @note To access custom data handlers it can be cool to prefix the handler name by plugin
+    # name for example ? (to ensure name unicity)
     @classmethod
     def from_name(cls, name):
         cls.load_base_handlers()
@@ -214,7 +253,24 @@ class DataHandler(object):
             raise NameError("No data handlers named '%s'" % (name,))
         return all_handlers[name]
 
-    ##@brief Return the module name to import in order to use the datahandler
+    # @brief List all datahandlers
+    # @return a dict with, display_name for keys, and a dict for value 
+    @classmethod
+    def list_data_handlers(cls):
+        cls.load_base_handlers()
+        all_handlers = dict(cls._base_handlers, **cls.__custom_handlers)
+        list_dh = dict()
+        for hdl in all_handlers:
+            list_dh[hdl.display_name] = {'help_text' : hdl.help_text,
+                            'nullable' : hdl.nullable, \
+                            'internal' : hdl.internal,
+                            'immutable' : hdl.immutable, \
+                            'primary_key' : hdl.primary_key, \
+                            'options' : self.options_spec}
+
+        return list_dh
+
+    ## @brief Return the module name to import in order to use the datahandler
     # @param data_handler_name str : Data handler name
     # @return a str
     @classmethod
@@ -222,62 +278,64 @@ class DataHandler(object):
         name = name.lower()
         handler_class = cls.from_name(name)
         return '{module_name}.{class_name}'.format(
-                                                    module_name=handler_class.__module__,
-                                                    class_name=handler_class.__name__
+            module_name=handler_class.__module__,
+            class_name=handler_class.__name__
         )
 
-    ##@brief __hash__ implementation for fieldtypes
+    ## @brief __hash__ implementation for fieldtypes
     def __hash__(self):
         hash_dats = [self.__class__.__module__]
         for kdic in sorted([k for k in self.__dict__.keys() if not k.startswith('_')]):
             hash_dats.append((kdic, getattr(self, kdic)))
         return hash(tuple(hash_dats))
 
-##@brief Base class for datas data handler (by opposition with references)
-#@ingroup lodel2_datahandlers
+## @brief Base class for datas data handler (by opposition with references)
+# @ingroup lodel2_datahandlers
 class DataField(DataHandler):
     pass
 
-##@brief Abstract class for all references
-#@ingroup lodel2_datahandlers
+
+## @brief Abstract class for all references
+# @ingroup lodel2_datahandlers
 #
 # References are fields that stores a reference to another
 # editorial object
-#@todo Construct data implementation : transform the data into a LeObject
-#instance
-
+# @todo Construct data implementation : transform the data into a LeObject instance
 class Reference(DataHandler):
     base_type = "ref"
 
-    ##@brief Instanciation
+    ## @brief Instanciation
     # @param allowed_classes list | None : list of allowed em classes if None no restriction
     # @param back_reference tuple | None : tuple containing (LeObject child class, fieldname)
     # @param internal bool : if False, the field is not internal
     # @param **kwargs : other arguments
     def __init__(self, allowed_classes=None, back_reference=None, internal=False, **kwargs):
         self.__allowed_classes = set() if allowed_classes is None else set(allowed_classes)
-        self.allowed_classes = list() if allowed_classes is None else allowed_classes # For now usefull to jinja 2
+        # For now usefull to jinja 2
+        self.allowed_classes = list() if allowed_classes is None else allowed_classes
         if back_reference is not None:
             if len(back_reference) != 2:
                 raise ValueError("A tuple (classname, fieldname) expected but got '%s'" % back_reference)
-            #if not issubclass(lodel.leapi.leobject.LeObject, back_reference[0]) or not isinstance(back_reference[1], str):
-            #    raise TypeError("Back reference was expected to be a tuple(<class LeObject>, str) but got : (%s, %s)" % (back_reference[0], back_reference[1]))
+            # if not issubclass(lodel.leapi.leobject.LeObject, back_reference[0])
+            # or not isinstance(back_reference[1], str):
+            # raise TypeError("Back reference was expected to be a tuple(<class LeObject>, str)
+            # but got : (%s, %s)" % (back_reference[0], back_reference[1]))
         self.__back_reference = back_reference
         super().__init__(internal=internal, **kwargs)
 
-    ##@brief Method designed to return an empty value for this kind of
-    #multipleref
+    ## @brief Method designed to return an empty value for this kind of
+    # multipleref
     @classmethod
     def empty(cls):
         return None
 
-    ##@brief Property that takes value of a copy of the back_reference tuple
+    ## @brief Property that takes value of a copy of the back_reference tuple
     @property
     def back_reference(self):
         return copy.copy(self.__back_reference)
 
-    ##@brief Property that takes value of datahandler of the backreference or
-    #None
+    ## @brief Property that takes value of datahandler of the backreference or
+    # None
     @property
     def back_ref_datahandler(self):
         if self.__back_reference is None:
@@ -288,15 +346,15 @@ class Reference(DataHandler):
     def linked_classes(self):
         return copy.copy(self.__allowed_classes)
 
-    ##@brief Set the back reference for this field.
+    ## @brief Set the back reference for this field.
     def _set_back_reference(self, back_reference):
         self.__back_reference = back_reference
 
-    ##@brief Check and cast value in appropriate type
-    #@param value *
-    #@throw FieldValidationError if value is an appropriate type
-    #@return value
-    #@todo implement the check when we have LeObject uid check value
+    ## @brief Check and cast value in appropriate type
+    # @param value *
+    # @throw FieldValidationError if value is an appropriate type
+    # @return value
+    # @todo implement the check when we have LeObject uid check value
     def _check_data_value(self, value):
         from lodel.leapi.leobject import LeObject
         value = super()._check_data_value(value)
@@ -311,13 +369,13 @@ class Reference(DataHandler):
                 raise FieldValidationError("Reference datahandler can not check this value %s if any allowed_class is allowed." % value)
         return value
 
-    ##@brief Check datas consistency
-    #@param emcomponent EmComponent : An EmComponent child class instance
-    #@param fname : the field name
-    #@param datas dict : dict storing fields values
-    #@return an Exception instance if fails else True
-    #@todo check for performance issue and check logics
-    #@warning composed uid capabilities broken here
+    ## @brief Check datas consistency
+    # @param emcomponent EmComponent : An EmComponent child class instance
+    # @param fname : the field name
+    # @param datas dict : dict storing fields values
+    # @return an Exception instance if fails else True
+    # @todo check for performance issue and check logics
+    # @warning composed uid capabilities broken here
     def check_data_consistency(self, emcomponent, fname, datas):
         rep = super().check_data_consistency(emcomponent, fname, datas)
         if isinstance(rep, Exception):
@@ -333,21 +391,21 @@ class Reference(DataHandler):
         if not target_class.is_exist(value):
             logger.warning('Object referenced does not exist')
             return False
-        #target_uidfield = target_class.uid_fieldname()[0] #multi uid broken here
-        #obj = target_class.get([(target_uidfield, '=', value)])
-        #if len(obj) == 0:
+        # target_uidfield = target_class.uid_fieldname()[0] #multi uid broken here
+        # obj = target_class.get([(target_uidfield, '=', value)])
+        # if len(obj) == 0:
         #    logger.warning('Object referenced does not exist')
         #    return False
         return True
-    
-    ##@brief Utility method designed to fetch referenced objects
-    #@param value mixed : the field value
-    #@throw NotImplementedError
+
+    ## @brief Utility method designed to fetch referenced objects
+    # @param value mixed : the field value
+    # @throw NotImplementedError
     def get_referenced(self, value):
         raise NotImplementedError
 
 
-##@brief This class represent a data_handler for single reference to another object
+## @brief This class represent a data_handler for single reference to another object
 #
 # The fields using this data handlers are like "foreign key" on another object
 class SingleRef(Reference):
@@ -356,18 +414,18 @@ class SingleRef(Reference):
         super().__init__(allowed_classes=allowed_classes, **kwargs)
 
 
-    ##@brief Check and cast value in appropriate type
-    #@param value: *
-    #@throw FieldValidationError if value is unappropriate or can not be cast
-    #@return value
+    ## @brief Check and cast value in appropriate type
+    # @param value: *
+    # @throw FieldValidationError if value is unappropriate or can not be cast
+    # @return value
     def _check_data_value(self, value):
         value = super()._check_data_value(value)
         return value
 
-    ##@brief Utility method designed to fetch referenced objects
-    #@param value mixed : the field value
-    #@return A LeObject child class instance
-    #@throw LodelDataHandlerConsistencyException if no referenced object found
+    ## @brief Utility method designed to fetch referenced objects
+    # @param value mixed : the field value
+    # @return A LeObject child class instance
+    # @throw LodelDataHandlerConsistencyException if no referenced object found
     def get_referenced(self, value):
         for leo_cls in self.linked_classes:
             res = leo_cls.get_from_uid(value)
@@ -377,30 +435,30 @@ class SingleRef(Reference):
 referenced object with uid %s" % value)
 
 
-##@brief This class represent a data_handler for multiple references to another object
-#@ingroup lodel2_datahandlers
+## @brief This class represent a data_handler for multiple references to another object
+# @ingroup lodel2_datahandlers
 #
 # The fields using this data handlers are like SingleRef but can store multiple references in one field
 # @note for the moment split on ',' chars
 class MultipleRef(Reference):
 
-    ##
+    ## @brief Constructor
     # @param max_item int | None : indicate the maximum number of item referenced by this field, None mean no limit
     def __init__(self, max_item=None, **kwargs):
         self.max_item = max_item
         super().__init__(**kwargs)
 
-    ##@brief Method designed to return an empty value for this kind of
-    #multipleref
+    ## @brief Method designed to return an empty value for this kind of
+    # multipleref
     @classmethod
     def empty(cls):
         return []
 
-    ##@brief Check and cast value in appropriate type
-    #@param value *
-    #@throw FieldValidationError if value is unappropriate or can not be cast
-    #@return value
-    #@TODO  Writing test error for errors when stored multiple references in one field
+    ## @brief Check and cast value in appropriate type
+    # @param value *
+    # @throw FieldValidationError if value is unappropriate or can not be cast
+    # @return value
+    # @TODO  Writing test error for errors when stored multiple references in one field
     def _check_data_value(self, value):
         value = DataHandler._check_data_value(self, value)
         if not hasattr(value, '__iter__'):
@@ -408,7 +466,7 @@ class MultipleRef(Reference):
         if self.max_item is not None:
             if self.max_item < len(value):
                 raise FieldValidationError("Too many items")
-        new_val = list() 
+        new_val = list()
         error_list = list()
         for i, v in enumerate(value):
             try:
@@ -420,11 +478,11 @@ class MultipleRef(Reference):
             raise FieldValidationError("MultipleRef have for invalid values [%s]  :" % (",".join(error_list)))
         return new_val
 
-    ##@brief Utility method designed to fetch referenced objects
-    #@param values mixed : the field values
-    #@return A list of LeObject child class instance
-    #@throw LodelDataHandlerConsistencyException if some referenced objects
-    #were not found
+    ## @brief Utility method designed to fetch referenced objects
+    # @param values mixed : the field values
+    # @return A list of LeObject child class instance
+    # @throw LodelDataHandlerConsistencyException if some referenced objects
+    # were not found
     def get_referenced(self, values):
         if values is None or len(values) == 0:
             return list()
@@ -432,18 +490,19 @@ class MultipleRef(Reference):
         values = set(values)
         res = list()
         for leo_cls in self.linked_classes:
-            uidname = leo_cls.uid_fieldname()[0] #MULTIPLE UID BROKEN HERE
+            uidname = leo_cls.uid_fieldname()[0]  # MULTIPLE UID BROKEN HERE
             tmp_res = leo_cls.get(('%s in (%s)' % (uidname, ','.join(
                 [str(l) for l in left]))))
-            left ^= set(( leo.uid() for leo in tmp_res))
+            left ^= set((leo.uid() for leo in tmp_res))
             res += tmp_res
             if len(left) == 0:
                 return res
         raise LodelDataHandlerConsistencyException("Unable to find \
 some referenced objects. Following uids were not found : %s" % ','.join(left))
 
+
 ## @brief Class designed to handle datas access will fieldtypes are constructing datas
-#@ingroup lodel2_datahandlers
+# @ingroup lodel2_datahandlers
 #
 # This class is designed to allow automatic scheduling of construct_data calls.
 #
@@ -457,15 +516,15 @@ class DatasConstructor(object):
     # @param datas dict : dict with field name as key and field values as value
     # @param fields_handler dict : dict with field name as key and data handler instance as value
     def __init__(self, leobject, datas, fields_handler):
-        ## Stores concerned class
+        # Stores concerned class
         self._leobject = leobject
-        ## Stores datas and constructed datas
+        # Stores datas and constructed datas
         self._datas = copy.copy(datas)
-        ## Stores fieldtypes
+        # Stores fieldtypes
         self._fields_handler = fields_handler
-        ## Stores list of fieldname for constructed datas
+        # Stores list of fieldname for constructed datas
         self._constructed = []
-        ## Stores construct calls list
+        # Stores construct calls list
         self._construct_calls = []
 
     ## @brief Implements the dict.keys() method on instance
@@ -488,3 +547,30 @@ class DatasConstructor(object):
         self._datas[fname] = value
         warnings.warn("Setting value of an DatasConstructor instance")
 
+
+## @brief Class designed to handle an option of a DataHandler
+class DatahandlerOption(MlNamedObject):
+
+    ## @brief instanciates a new Datahandler option object
+    #
+    # @param id str
+    # @param display_name MlString
+    # @param help_text MlString
+    # @param validator function
+    def __init__(self, id, display_name, help_text, validator):
+        self.__id = id
+        self.__validator = validator
+        super().__init__(display_name, help_text)
+
+    @property
+    def id(self):
+        return self.__id
+
+    ## @brief checks a value corresponding to this option is valid
+    # @param value
+    # @return casted value
+    def check_value(self, value):
+        try:
+            return self.__validator(value)
+        except ValidationError:
+            raise ValueError()

lodel/leapi/datahandlers/datas.py

@@ -7,9 +7,9 @@ from lodel.context import LodelContext
 
 LodelContext.expose_modules(globals(), {
     'lodel.leapi.datahandlers.datas_base': ['Boolean', 'Integer', 'Varchar',
-        'DateTime', 'Text', 'File'],
+                                            'DateTime', 'Text', 'File'],
     'lodel.exceptions': ['LodelException', 'LodelExceptions',
-        'LodelFatalError', 'DataNoneValid', 'FieldValidationError']})
+                         'LodelFatalError', 'DataNoneValid', 'FieldValidationError']})
 
 
 ##@brief Data field designed to handle formated strings
@@ -26,7 +26,7 @@ build its content'
     def __init__(self, format_string, field_list, **kwargs):
         self._field_list = field_list
         self._format_string = format_string
-        super().__init__(internal='automatic',**kwargs)
+        super().__init__(internal='automatic', **kwargs)
 
     def _construct_data(self, emcomponent, fname, datas, cur_value):
         ret = self._format_string % tuple(
@@ -49,7 +49,7 @@ max_length and regex'
     # @param **kwargs
     def __init__(self, regex='', max_length=10, **kwargs):
         self.regex = regex
-        self.compiled_re = re.compile(regex)#trigger an error if invalid regex
+        self.compiled_re = re.compile(regex)  # trigger an error if invalid regex
         super(self.__class__, self).__init__(max_length=max_length, **kwargs)
 
     ##@brief Check and cast value in appropriate type
@@ -106,7 +106,8 @@ be internal")
         if not inspect.isclass(emcomponent):
             cls = emcomponent.__class__
         return cls.__name__
-        
+
+
 ##@brief Data field designed to handle concatenated fields
 class Concat(FormatString):
     help = 'Automatic strings concatenation'
@@ -116,11 +117,11 @@ class Concat(FormatString):
     # @param field_list list : List of field to use
     # @param separator str
     # @param **kwargs    
-    def __init__(self, field_list, separator = ' ', **kwargs):
+    def __init__(self, field_list, separator=' ', **kwargs):
         format_string = separator.join(['%s' for _ in field_list])
-        super().__init__(
-            format_string = format_string, field_list = field_list, **kwargs)
-
+        super().__init__(format_string=format_string,
+                         field_list=field_list,
+                         **kwargs)
 
 
 class Password(Varchar):
@@ -129,7 +130,6 @@ class Password(Varchar):
     pass
 
 
-
 class VarcharList(Varchar):
     help = 'DataHandler designed to make a list out of a string.'
     base_type = 'varchar'
@@ -140,7 +140,6 @@ class VarcharList(Varchar):
         self.delimiter = str(delimiter)
         super().__init__(**kwargs)
 
-
     def construct_data(self, emcomponent, fname, datas, cur_value):
         result = cur_value.split(self.delimiter)
         return result

lodel/leapi/datahandlers/datas_base.py

@@ -8,32 +8,33 @@ from lodel.context import LodelContext
 LodelContext.expose_modules(globals(), {
     'lodel.leapi.datahandlers.base_classes': ['DataField'],
     'lodel.exceptions': ['LodelException', 'LodelExceptions',
-        'LodelFatalError', 'DataNoneValid', 'FieldValidationError']})
+                         'LodelFatalError', 'DataNoneValid', 'FieldValidationError']})
 
 
-##@brief Data field designed to handle boolean values
+## @brief Data field designed to handle boolean values
 class Boolean(DataField):
 
     help = 'A basic boolean field'
     base_type = 'bool'
 
-    ##@brief A boolean field
+    ## @brief A boolean field
     def __init__(self, **kwargs):
         #if 'check_data_value' not in kwargs:
         #    kwargs['check_data_value'] = self._check_data_value
         super().__init__(ftype='bool', **kwargs)
 
-    ##@brief Check and cast value in appropriate type
-    #@param value *
-    #@throw FieldValidationError if value is unappropriate or can not be cast 
-    #@return value
+    ## @brief Check and cast value in appropriate type
+    # @param value *
+    # @throw FieldValidationError if value is unappropriate or can not be cast
+    # @return value
     def _check_data_value(self, value):
         value = super()._check_data_value(value)   
         if not isinstance(value, bool):
             raise FieldValidationError("The value '%s' is not, and will never, be a boolean" % value)
         return value
 
-##@brief Data field designed to handle integer values
+
+## @brief Data field designed to handle integer values
 class Integer(DataField):
 
     help = 'Basic integer field'
@@ -41,14 +42,14 @@ class Integer(DataField):
     cast_type = int
 
     def __init__(self, **kwargs):
-        super().__init__( **kwargs)
+        super().__init__(**kwargs)
 
-    ##@brief Check and cast value in appropriate type
+    ## @brief Check and cast value in appropriate type
     # @param value *
     # @param strict bool : tells if the value must be an integer or a value that can be converted into an integer
     # @throw FieldValidationError if value is unappropriate or can not be cast
     # @return value
-    def _check_data_value(self, value, strict = False):
+    def _check_data_value(self, value, strict=False):
         value = super()._check_data_value(value)
         if (strict and not isinstance(value, int)):
             raise FieldValidationError("The value '%s' is not a python type integer" % value)
@@ -61,19 +62,20 @@ class Integer(DataField):
             raise FieldValidationError("The value '%s' is not, and will never, be an integer" % value)
         return value
 
-##@brief Data field designed to handle string
+
+## @brief Data field designed to handle string
 class Varchar(DataField):
 
     help = 'Basic string (varchar) field. Default size is 64 characters'
     base_type = 'char'
 
-    ##@brief A string field
+    ## @brief A string field
     # @brief max_length int: The maximum length of this field
     def __init__(self, max_length=64, **kwargs):
         self.max_length = int(max_length)
         super().__init__(**kwargs)
 
-    ##@brief checks if this class can override the given data handler
+    ## @brief checks if this class can override the given data handler
     # @param data_handler DataHandler
     # @return bool
     def can_override(self, data_handler):
@@ -83,25 +85,26 @@ class Varchar(DataField):
             return False
         return True
     
-    ##@brief Check and cast value in appropriate type
-    #@param value *
-    #@throw FieldValidationError if value is unappropriate or can not be cast 
-    #@return value
+    ## @brief Check and cast value in appropriate type
+    # @param value *
+    # @throw FieldValidationError if value is unappropriate or can not be cast
+    # @return value
     def _check_data_value(self, value):
         value = super()._check_data_value(value)   
         if not isinstance(value, str):
             raise FieldValidationError("The value '%s' can't be a str" % value)
         if len(value) > self.max_length:
-             raise FieldValidationError("The value '%s' is longer than the maximum length of this field (%s)" % (value, self.max_length))
+            raise FieldValidationError("The value '%s' is longer than the maximum length of this field (%s)" % (value, self.max_length))
         return value
 
-##@brief Data field designed to handle date & time 
+
+## @brief Data field designed to handle date & time
 class DateTime(DataField):
 
     help = 'A datetime field. Take two boolean options now_on_update and now_on_create'
     base_type = 'datetime'
 
-    ##@brief A datetime field
+    ## @brief A datetime field
     # @param now_on_update bool : If true, the date is set to NOW on update
     # @param now_on_create bool : If true, the date is set to NEW on creation
     # @param **kwargs
@@ -111,13 +114,13 @@ class DateTime(DataField):
         self.datetime_format = '%Y-%m-%d' if 'format' not in kwargs else kwargs['format']
         super().__init__(**kwargs)
 
-    ##@brief Check and cast value in appropriate type
-    #@param value *
-    #@throw FieldValidationError if value is unappropriate or can not be cast 
-    #@return value
+    ## @brief Check and cast value in appropriate type
+    # @param value *
+    # @throw FieldValidationError if value is unappropriate or can not be cast
+    # @return value
     def _check_data_value(self, value):
         value = super()._check_data_value(value)
-        if isinstance(value,str):
+        if isinstance(value, str):
             try:
                 value = datetime.datetime.fromtimestamp(time.mktime(time.strptime(value, self.datetime_format)))
             except ValueError:
@@ -131,7 +134,8 @@ class DateTime(DataField):
             return datetime.datetime.now()
         return cur_value
 
-##@brief Data field designed to handle long string
+
+## @brief Data field designed to handle long string
 class Text(DataField):
     help = 'A text field (big string)'
     base_type = 'text'
@@ -139,22 +143,23 @@ class Text(DataField):
     def __init__(self, **kwargs):
         super(self.__class__, self).__init__(ftype='text', **kwargs)
     
-    ##@brief Check and cast value in appropriate type
-    #@param value *
-    #@throw FieldValidationError if value is unappropriate or can not be cast 
-    #@return value
+    ## @brief Check and cast value in appropriate type
+    # @param value *
+    # @throw FieldValidationError if value is unappropriate or can not be cast
+    # @return value
     def _check_data_value(self, value):
         value = super()._check_data_value(value)   
         if not isinstance(value, str):
             raise FieldValidationError("The content passed to this Text field is not a convertible to a string")
         return value
 
-##@brief Data field designed to handle Files
+
+## @brief Data field designed to handle Files
 class File(DataField):
 
     base_type = 'file'
 
-    ##@brief a file field
+    ## @brief a file field
     # @param upload_path str : None by default
     # @param **kwargs
     def __init__(self, upload_path=None, **kwargs):
@@ -164,4 +169,3 @@ class File(DataField):
     # @todo Add here a check for the validity of the given value (should have a correct path syntax)
     def _check_data_value(self, value):
         return super()._check_data_value(value)   
-

lodel/leapi/datahandlers/exceptions.py

@@ -1,5 +1,6 @@
-def LodelDataHandlerException(Exception):
+class LodelDataHandlerException(Exception):
     pass
 
-def LodelDataHandlerConsistencyException(LodelDataHandlerException):
+
+class LodelDataHandlerConsistencyException(LodelDataHandlerException):
     pass

lodel/leapi/datahandlers/references.py

@@ -3,35 +3,37 @@
 from lodel.context import LodelContext
 LodelContext.expose_modules(globals(), {
     'lodel.leapi.datahandlers.base_classes': ['Reference', 'MultipleRef',
-        'SingleRef'],
+                                              'SingleRef'],
     'lodel.logger': 'logger',
     'lodel.exceptions': ['LodelException', 'LodelExceptions',
-        'LodelFatalError', 'DataNoneValid', 'FieldValidationError']})
+                         'LodelFatalError', 'DataNoneValid',
+                         'FieldValidationError']})
+
 
 class Link(SingleRef):
     pass
 
 
-##@brief Child class of MultipleRef where references are represented in the form of a python list
+## @brief Child class of MultipleRef where references are represented in the form of a python list
 class List(MultipleRef):
 
-    ##@brief instanciates a list reference
+    ## @brief instanciates a list reference
     # @param max_length int
     # @param kwargs
     #   - allowed_classes list | None : list of allowed em classes if None no restriction
     #   - internal bool
 
-    def __init__(self, max_length = None, **kwargs):
+    def __init__(self, max_length=None, **kwargs):
         super().__init__(**kwargs)
 
     @classmethod
     def empty(cls):
         return list()
 
-    ##@brief Check and cast value in appropriate type
-    #@param value *
-    #@throw FieldValidationError if value is unappropriate or can not be cast 
-    #@return value
+    ## @brief Check and cast value in appropriate type
+    # @param value *
+    # @throw FieldValidationError if value is unappropriate or can not be cast
+    # @return value
     def _check_data_value(self, value):
         value = super()._check_data_value(value)
         try:
@@ -39,12 +41,12 @@ class List(MultipleRef):
         except Exception as e:
             raise FieldValidationError("Given iterable is not castable in \
 a list : %s" % e)
-        return value
 
-##@brief Child class of MultipleRef where references are represented in the form of a python set
+
+## @brief Child class of MultipleRef where references are represented in the form of a python set
 class Set(MultipleRef):
 
-    ##@brief instanciates a set reference
+    ## @brief instanciates a set reference
     # @param kwargs : named arguments
     #   - allowed_classes list | None : list of allowed em classes if None no restriction
     #   - internal bool : if False, the field is not internal
@@ -55,10 +57,10 @@ class Set(MultipleRef):
     def empty(cls):
         return set()
 
-    ##@brief Check and cast value in appropriate type
-    #@param value *
-    #@throw FieldValidationError if value is unappropriate or can not be cast 
-    #@return value
+    ## @brief Check and cast value in appropriate type
+    # @param value *
+    # @throw FieldValidationError if value is unappropriate or can not be cast
+    # @return value
     def _check_data_value(self, value):
         value = super()._check_data_value(value)
         try:
@@ -66,11 +68,12 @@ class Set(MultipleRef):
         except Exception as e:
             raise FieldValidationError("Given iterable is not castable in \
 a set : %s" % e)
-    
-##@brief Child class of MultipleRef where references are represented in the form of a python dict
+
+
+## @brief Child class of MultipleRef where references are represented in the form of a python dict
 class Map(MultipleRef):
 
-    ##@brief instanciates a dict reference
+    ## @brief instanciates a dict reference
     # @param kwargs : named arguments
     #   - allowed_classes list | None : list of allowed em classes if None no restriction
     #   - internal bool : if False, the field is not internal
@@ -81,38 +84,40 @@ class Map(MultipleRef):
     def empty(cls):
         return dict()
 
-    ##@brief Check and cast value in appropriate type
-    #@param value *
-    #@throw FieldValidationError if value is unappropriate or can not be cast 
-    #@return value
+    ## @brief Check and cast value in appropriate type
+    # @param value *
+    # @throw FieldValidationError if value is unappropriate or can not be cast
+    # @return value
     def _check_data_value(self, value):
         value = super()._check_data_value(value)
         if not isinstance(value, dict):
             raise FieldValidationError("Values for dict fields should be dict")
         return value
 
-##@brief This Reference class is designed to handler hierarchy with some constraint
+
+## @brief This Reference class is designed to handler hierarchy with some constraint
 class Hierarch(MultipleRef):
     
     directly_editable = False
-    ##@brief Instanciate a data handler handling hierarchical relation with constraints
+
+    ## @brief Instanciate a data handler handling hierarchical relation with constraints
     # @param back_reference tuple : Here it is mandatory to have a back ref (like a parent field)
     # @param max_depth int | None :  limit of depth
     # @param max_childs int | Nine : maximum number of childs by nodes
-    def __init__(self, back_reference, max_depth = None, max_childs = None, **kwargs):
-        super().__init__(   back_reference = back_reference,
-                            max_depth = max_depth,
-                            max_childs = max_childs,
-                            **kwargs)
+    def __init__(self, back_reference, max_depth=None, max_childs=None, **kwargs):
+        super().__init__(back_reference=back_reference,
+                         max_depth=max_depth,
+                         max_childs=max_childs,
+                         **kwargs)
 
     @classmethod
     def empty(cls):
         return tuple()
 
-    ##@brief Check and cast value in appropriate type
-    #@param value *
-    #@throw FieldValidationError if value is unappropriate or can not be cast 
-    #@return value
+    ## @brief Check and cast value in appropriate type
+    # @param value *
+    # @throw FieldValidationError if value is unappropriate or can not be cast
+    # @return value
     def _check_data_value(self, value):
         value = super()._check_data_value(value)
         if  not (isinstance(value, list) or isinstance(value, str)):

lodel/leapi/leobject.py

@@ -11,77 +11,79 @@ LodelContext.expose_modules(globals(), {
     'lodel.settings': 'Settings',
     'lodel.settings.utils': 'SettingsError',
     'lodel.leapi.query': ['LeInsertQuery', 'LeUpdateQuery', 'LeDeleteQuery',
-        'LeGetQuery'],
+                          'LeGetQuery'],
     'lodel.leapi.exceptions': ['LeApiError', 'LeApiErrors',
-        'LeApiDataCheckError', 'LeApiDataCheckErrors', 'LeApiQueryError',
-        'LeApiQueryErrors'],
+                               'LeApiDataCheckError', 'LeApiDataCheckErrors', 'LeApiQueryError',
+                               'LeApiQueryErrors'],
     'lodel.plugin.exceptions': ['PluginError', 'PluginTypeError',
-        'LodelScriptError', 'DatasourcePluginError'],
+                                'LodelScriptError', 'DatasourcePluginError'],
     'lodel.exceptions': ['LodelFatalError'],
     'lodel.plugin.hooks': ['LodelHook'],
     'lodel.plugin': ['Plugin', 'DatasourcePlugin'],
     'lodel.leapi.datahandlers.base_classes': ['DatasConstructor', 'Reference']})
 
-##@brief Stores the name of the field present in each LeObject that indicates
-#the name of LeObject subclass represented by this object
+# @brief Stores the name of the field present in each LeObject that indicates
+# the name of LeObject subclass represented by this object
 CLASS_ID_FIELDNAME = "classname"
 
-##@brief Wrapper class for LeObject getter & setter
+# @brief Wrapper class for LeObject getter & setter
 #
-# This class intend to provide easy & friendly access to LeObject fields values 
+# This class intend to provide easy & friendly access to LeObject fields values
 # without name collision problems
 # @note Wrapped methods are : LeObject.data() & LeObject.set_data()
+
+
 class LeObjectValues(object):
-    
-    ##@brief Construct a new LeObjectValues
+
+    # @brief Construct a new LeObjectValues
     # @param fieldnames_callback method
     # @param set_callback method : The LeObject.set_datas() method of corresponding LeObject class
     # @param get_callback method : The LeObject.get_datas() method of corresponding LeObject class
     def __init__(self, fieldnames_callback, set_callback, get_callback):
         self._setter = set_callback
         self._getter = get_callback
-    
-    ##@brief Provide read access to datas values
+
+    # @brief Provide read access to datas values
     # @note Read access should be provided for all fields
     # @param fname str : Field name
     def __getattribute__(self, fname):
         getter = super().__getattribute__('_getter')
         return getter(fname)
-    
-    ##@brief Provide write access to datas values
+
+    # @brief Provide write access to datas values
     # @note Write acces shouldn't be provided for internal or immutable fields
     # @param fname str : Field name
     # @param fval * : the field value
     def __setattribute__(self, fname, fval):
         setter = super().__getattribute__('_setter')
         return setter(fname, fval)
-        
+
 
 class LeObject(object):
- 
-    ##@brief boolean that tells if an object is abtract or not
+
+    # @brief boolean that tells if an object is abtract or not
     _abstract = None
-    ##@brief A dict that stores DataHandler instances indexed by field name
+    # @brief A dict that stores DataHandler instances indexed by field name
     _fields = None
-    ##@brief A tuple of fieldname (or a uniq fieldname) representing uid
-    _uid = None 
-    ##@brief Read only datasource ( see @ref lodel2_datasources )
+    # @brief A tuple of fieldname (or a uniq fieldname) representing uid
+    _uid = None
+    # @brief Read only datasource ( see @ref lodel2_datasources )
     _ro_datasource = None
-    ##@brief Read & write datasource ( see @ref lodel2_datasources )
+    # @brief Read & write datasource ( see @ref lodel2_datasources )
     _rw_datasource = None
-    ##@brief Store the list of child classes
+    # @brief Store the list of child classes
     _child_classes = None
-    ##@brief Name of the datasource plugin
+    # @brief Name of the datasource plugin
     _datasource_name = None
 
     def __new__(cls, **kwargs):
-        
+
         self = object.__new__(cls)
-        ##@brief A dict that stores fieldvalues indexed by fieldname
-        self.__datas = { fname:None for fname in self._fields }
-        ##@brief Store a list of initianilized fields when instanciation not complete else store True
+        # @brief A dict that stores fieldvalues indexed by fieldname
+        self.__datas = {fname: None for fname in self._fields}
+        # @brief Store a list of initianilized fields when instanciation not complete else store True
         self.__initialized = list()
-        ##@brief Datas accessor. Instance of @ref LeObjectValues
+        # @brief Datas accessor. Instance of @ref LeObjectValues
         self.d = LeObjectValues(self.fieldnames, self.set_data, self.data)
         for fieldname, fieldval in kwargs.items():
             self.__datas[fieldname] = fieldval
@@ -90,11 +92,12 @@ class LeObject(object):
         self.__set_initialized()
         return self
 
-    ##@brief Construct an object representing an Editorial component
+    # @brief Construct an object representing an Editorial component
     # @note Can be considered as EmClass instance
     def __init__(self, **kwargs):
         if self._abstract:
-            raise NotImplementedError("%s is abstract, you cannot instanciate it." % self.__class__.__name__ )
+            raise NotImplementedError(
+                "%s is abstract, you cannot instanciate it." % self.__class__.__name__)
 
         # Checks that uid is given
         for uid_name in self._uid:
@@ -105,7 +108,7 @@ class LeObject(object):
             self.__initialized.append(uid_name)
 
         # Processing given fields
-        allowed_fieldnames = self.fieldnames(include_ro = False)
+        allowed_fieldnames = self.fieldnames(include_ro=False)
         err_list = dict()
         for fieldname, fieldval in kwargs.items():
             if fieldname not in allowed_fieldnames:
@@ -119,39 +122,39 @@ class LeObject(object):
                 self.__datas[fieldname] = fieldval
                 self.__initialized.append(fieldname)
         if len(err_list) > 0:
-            raise LeApiErrors(msg = "Unable to __init__ %s" % self.__class__,
-                exceptions = err_list)
+            raise LeApiErrors(msg="Unable to __init__ %s" % self.__class__,
+                              exceptions=err_list)
         self.__set_initialized()
-    
+
     #-----------------------------------#
     #   Fields datas handling methods   #
     #-----------------------------------#
 
-    ##@brief Property method True if LeObject is initialized else False
+    # @brief Property method True if LeObject is initialized else False
     @property
     def initialized(self):
         return self.__is_initialized
-    
-    ##@return The uid field name
+
+    # @return The uid field name
     @classmethod
     def uid_fieldname(cls):
         return cls._uid
 
-    ##@brief Return a list of fieldnames
+    # @brief Return a list of fieldnames
     # @param include_ro bool : if True include read only field names
     # @return a list of str
     @classmethod
-    def fieldnames(cls, include_ro = False):
+    def fieldnames(cls, include_ro=False):
         if not include_ro:
-            return [ fname for fname in cls._fields if not cls._fields[fname].is_internal() ]
+            return [fname for fname in cls._fields if not cls._fields[fname].is_internal()]
         else:
             return list(cls._fields.keys())
- 
+
     @classmethod
     def name2objname(cls, name):
         return name.title()
-    
-    ##@brief Return the datahandler asssociated with a LeObject field
+
+    # @brief Return the datahandler asssociated with a LeObject field
     # @param fieldname str : The fieldname
     # @return A data handler instance
     #@todo update class of exception raised
@@ -160,18 +163,18 @@ class LeObject(object):
         if not fieldname in cls._fields:
             raise NameError("No field named '%s' in %s" % (fieldname, cls.__name__))
         return cls._fields[fieldname]
-    
-    ##@brief Getter for references datahandlers
+
+    # @brief Getter for references datahandlers
     #@param with_backref bool : if true return only references with back_references
     #@return <code>{'fieldname': datahandler, ...}</code>
     @classmethod
-    def reference_handlers(cls, with_backref = True):
-        return {    fname: fdh 
-                    for fname, fdh in cls.fields(True).items()
-                    if fdh.is_reference() and \
-                        (not with_backref or fdh.back_reference is not None)}
-    
-    ##@brief Return a LeObject child class from a name
+    def reference_handlers(cls, with_backref=True):
+        return {fname: fdh
+                for fname, fdh in cls.fields(True).items()
+                if fdh.is_reference() and
+                (not with_backref or fdh.back_reference is not None)}
+
+    # @brief Return a LeObject child class from a name
     # @warning This method has to be called from dynamically generated LeObjects
     # @param leobject_name str : LeObject name
     # @return A LeObject child class
@@ -183,14 +186,14 @@ class LeObject(object):
         mod = importlib.import_module(cls.__module__)
         try:
             return getattr(mod, leobject_name)
-        except (AttributeError, TypeError) :
+        except (AttributeError, TypeError):
             raise LeApiError("No LeObject named '%s'" % leobject_name)
-    
+
     @classmethod
     def is_abstract(cls):
         return cls._abstract
-    
-    ##@brief Field data handler getter
+
+    # @brief Field data handler getter
     #@param fieldname str : The field name
     #@return A datahandler instance
     #@throw NameError if the field doesn't exist
@@ -199,20 +202,22 @@ class LeObject(object):
         try:
             return cls._fields[fieldname]
         except KeyError:
-            raise NameError("No field named '%s' in %s" % ( fieldname,
-                                                            cls.__name__))
-    ##@return A dict with fieldname as key and datahandler as instance
+            raise NameError("No field named '%s' in %s" % (fieldname,
+                                                           cls.__name__))
+    # @return A dict with fieldname as key and datahandler as instance
+
     @classmethod
-    def fields(cls, include_ro = False):
+    def fields(cls, include_ro=False):
         if include_ro:
             return copy.copy(cls._fields)
         else:
-            return {fname:cls._fields[fname] for fname in cls._fields if not cls._fields[fname].is_internal()}
-    
-    ##@brief Return the list of parents classes
+            return {fname: cls._fields[fname] for fname in cls._fields\
+                    if not cls._fields[fname].is_internal()}
+
+    # @brief Return the list of parents classes
     #
     #@note the first item of the list is the current class, the second is it's
-    #parent etc...
+    # parent etc...
     #@param cls
     #@warning multiple inheritance broken by this method
     #@return a list of LeObject child classes
@@ -222,23 +227,22 @@ class LeObject(object):
         res = [cls]
         cur = cls
         while True:
-            cur = cur.__bases__[0] # Multiple inheritance broken HERE
+            cur = cur.__bases__[0]  # Multiple inheritance broken HERE
             if cur in (LeObject, object):
                 break
             else:
                 res.append(cur)
         return res
-    
-    ##@brief Return a tuple a child classes
+
+    # @brief Return a tuple a child classes
     #@return a tuple of child classes
     @classmethod
     def child_classes(cls):
         return copy.copy(cls._child_classes)
-        
 
-    ##@brief Return the parent class that is the "source" of uid
+    # @brief Return the parent class that is the "source" of uid
     #
-    #The method goal is to return the parent class that defines UID.
+    # The method goal is to return the parent class that defines UID.
     #@return a LeObject child class or false if no UID defined
     @classmethod
     def uid_source(cls):
@@ -246,19 +250,19 @@ class LeObject(object):
             return False
         hierarch = cls.hierarch()
         prev = hierarch[0]
-        uid_handlers = set( cls._fields[name] for name in cls._uid )
+        uid_handlers = set(cls._fields[name] for name in cls._uid)
         for pcls in cls.hierarch()[1:]:
             puid_handlers = set(cls._fields[name] for name in pcls._uid)
             if set(pcls._uid) != set(prev._uid) \
-                or puid_handlers != uid_handlers:
+                    or puid_handlers != uid_handlers:
                 break
             prev = pcls
         return prev
-    
-    ##@brief Initialise both datasources (ro and rw)
+
+    # @brief Initialise both datasources (ro and rw)
     #
-    #This method is used once at dyncode load to replace the datasource string
-    #by a datasource instance to avoid doing this operation for each query
+    # This method is used once at dyncode load to replace the datasource string
+    # by a datasource instance to avoid doing this operation for each query
     #@see LeObject::_init_datasource()
     @classmethod
     def _init_datasources(cls):
@@ -266,7 +270,7 @@ class LeObject(object):
             rw_ds = ro_ds = cls._datasource_name
         else:
             ro_ds, rw_ds = cls._datasource_name
-        #Read only datasource initialisation
+        # Read only datasource initialisation
         cls._ro_datasource = DatasourcePlugin.init_datasource(ro_ds, True)
         if cls._ro_datasource is None:
             log_msg = "No read only datasource set for LeObject %s"
@@ -276,7 +280,7 @@ class LeObject(object):
             log_msg = "Read only datasource '%s' initialized for LeObject %s"
             log_msg %= (ro_ds, cls.__name__)
             logger.debug(log_msg)
-        #Read write datasource initialisation
+        # Read write datasource initialisation
         cls._rw_datasource = DatasourcePlugin.init_datasource(rw_ds, False)
         if cls._ro_datasource is None:
             log_msg = "No read/write datasource set for LeObject %s"
@@ -286,14 +290,14 @@ class LeObject(object):
             log_msg = "Read/write datasource '%s' initialized for LeObject %s"
             log_msg %= (ro_ds, cls.__name__)
             logger.debug(log_msg)
-        
-    ##@brief Return the uid of the current LeObject instance
+
+    # @brief Return the uid of the current LeObject instance
     #@return the uid value
     #@warning Broke multiple uid capabilities
     def uid(self):
         return self.data(self._uid[0])
 
-    ##@brief Read only access to all datas
+    # @brief Read only access to all datas
     # @note for fancy data accessor use @ref LeObject.g attribute @ref LeObjectValues instance
     # @param field_name str : field name
     # @return the Value
@@ -303,16 +307,16 @@ class LeObject(object):
         if field_name not in self._fields.keys():
             raise NameError("No such field in %s : %s" % (self.__class__.__name__, field_name))
         if not self.initialized and field_name not in self.__initialized:
-            raise RuntimeError("The field %s is not initialized yet (and have no value)" % field_name)
+            raise RuntimeError(
+                "The field %s is not initialized yet (and have no value)" % field_name)
         return self.__datas[field_name]
-    
-    ##@brief Read only access to all datas
+
+    # @brief Read only access to all datas
     #@return a dict representing datas of current instance
-    def datas(self, internal = False):
-        return {fname:self.data(fname) for fname in self.fieldnames(internal)}
-        
-    
-    ##@brief Datas setter
+    def datas(self, internal=False):
+        return {fname: self.data(fname) for fname in self.fieldnames(internal)}
+
+    # @brief Datas setter
     # @note for fancy data accessor use @ref LeObject.g attribute @ref LeObjectValues instance
     # @param fname str : field name
     # @param fval * : field value
@@ -320,7 +324,7 @@ class LeObject(object):
     # @throw NameError if fname is not valid
     # @throw AttributeError if the field is not writtable
     def set_data(self, fname, fval):
-        if fname not in self.fieldnames(include_ro = False):
+        if fname not in self.fieldnames(include_ro=False):
             if fname not in self._fields.keys():
                 raise NameError("No such field in %s : %s" % (self.__class__.__name__, fname))
             else:
@@ -342,23 +346,23 @@ class LeObject(object):
             # We skip full validation here because the LeObject is not fully initialized yet
             val, err = self._fields[fname].check_data_value(fval)
             if isinstance(err, Exception):
-                #Revert change to be in valid state
+                # Revert change to be in valid state
                 del(self.__datas[fname])
                 del(self.__initialized[-1])
-                raise LeApiErrors("Data check error", {fname:err})
+                raise LeApiErrors("Data check error", {fname: err})
             else:
                 self.__datas[fname] = val
-    
-    ##@brief Update the __initialized attribute according to LeObject internal state
+
+    # @brief Update the __initialized attribute according to LeObject internal state
     #
     # Check the list of initialized fields and set __initialized to True if all fields initialized
     def __set_initialized(self):
         if isinstance(self.__initialized, list):
-            expected_fields = self.fieldnames(include_ro = False) + self._uid
+            expected_fields = self.fieldnames(include_ro=False) + self._uid
             if set(expected_fields) == set(self.__initialized):
                 self.__is_initialized = True
 
-    ##@brief Designed to be called when datas are modified
+    # @brief Designed to be called when datas are modified
     #
     # Make different checks on the LeObject given it's state (fully initialized or not)
     # @return None if checks succeded else return an exception list
@@ -366,7 +370,7 @@ class LeObject(object):
         err_list = dict()
         if self.__initialized is True:
             # Data value check
-            for fname in self.fieldnames(include_ro = False):
+            for fname in self.fieldnames(include_ro=False):
                 val, err = self._fields[fname].check_data_value(self.__datas[fname])
                 if err is not None:
                     err_list[fname] = err
@@ -374,19 +378,19 @@ class LeObject(object):
                     self.__datas[fname] = val
             # Data construction
             if len(err_list) == 0:
-                for fname in self.fieldnames(include_ro = True):
+                for fname in self.fieldnames(include_ro=True):
                     try:
                         field = self._fields[fname]
-                        self.__datas[fname] = field.construct_data(    self,
-                                                                        fname,
-                                                                        self.__datas,
-                                                                        self.__datas[fname]
-                        )
+                        self.__datas[fname] = field.construct_data(self,
+                                                                   fname,
+                                                                   self.__datas,
+                                                                   self.__datas[fname]
+                                                                   )
                     except Exception as exp:
                         err_list[fname] = exp
             # Datas consistency check
             if len(err_list) == 0:
-                for fname in self.fieldnames(include_ro = True):
+                for fname in self.fieldnames(include_ro=True):
                     field = self._fields[fname]
                     ret = field.check_data_consistency(self, fname, self.__datas)
                     if isinstance(ret, Exception):
@@ -404,8 +408,8 @@ class LeObject(object):
     #--------------------#
     #   Other methods    #
     #--------------------#
-    
-    ##@brief Temporary method to set private fields attribute at dynamic code generation
+
+    # @brief Temporary method to set private fields attribute at dynamic code generation
     #
     # This method is used in the generated dynamic code to set the _fields attribute
     # at the end of the dyncode parse
@@ -415,8 +419,8 @@ class LeObject(object):
     @classmethod
     def _set__fields(cls, field_list):
         cls._fields = field_list
-        
-    ## @brief Check that datas are valid for this type
+
+    # @brief Check that datas are valid for this type
     # @param datas dict : key == field name value are field values
     # @param complete bool : if True expect that datas provide values for all non internal fields
     # @param allow_internal bool : if True don't raise an error if a field is internal
@@ -424,10 +428,10 @@ class LeObject(object):
     # @return Checked datas
     # @throw LeApiDataCheckError if errors reported during check
     @classmethod
-    def check_datas_value(cls, datas, complete = False, allow_internal = True):
-        err_l = dict() #Error storing
-        correct = set() #valid fields name
-        mandatory = set() #mandatory fields name
+    def check_datas_value(cls, datas, complete=False, allow_internal=True):
+        err_l = dict()  # Error storing
+        correct = set()  # valid fields name
+        mandatory = set()  # mandatory fields name
         for fname, datahandler in cls._fields.items():
             if allow_internal or not datahandler.is_internal():
                 correct.add(fname)
@@ -436,15 +440,15 @@ class LeObject(object):
         provided = set(datas.keys())
         # searching for unknow fields
         for u_f in provided - correct:
-            #Here we can check if the field is invalid or rejected because
+            # Here we can check if the field is invalid or rejected because
             # it is internel
             err_l[u_f] = AttributeError("Unknown or unauthorized field '%s'" % u_f)
         # searching for missing mandatory fieldsa
         for missing in mandatory - provided:
             err_l[missing] = AttributeError("The data for field '%s' is missing" % missing)
-        #Checks datas
+        # Checks datas
         checked_datas = dict()
-        for name, value in [ (name, value) for name, value in datas.items() if name in correct ]:
+        for name, value in [(name, value) for name, value in datas.items() if name in correct]:
             dh = cls._fields[name]
             res = dh.check_data_value(value)
             checked_datas[name], err = res
@@ -455,10 +459,10 @@ class LeObject(object):
             raise LeApiDataCheckErrors("Error while checking datas", err_l)
         return checked_datas
 
-    ##@brief Check and prepare datas
-    # 
+    # @brief Check and prepare datas
+    #
     # @warning when complete = False we are not able to make construct_datas() and _check_data_consistency()
-    # 
+    #
     # @param datas dict : {fieldname : fieldvalue, ...}
     # @param complete bool : If True you MUST give all the datas
     # @param allow_internal : Wether or not interal fields are expected in datas
@@ -478,7 +482,7 @@ construction and consitency when datas are not complete\n")
             cls._check_datas_consistency(ret_datas)
         return ret_datas
 
-    ## @brief Construct datas values
+    # @brief Construct datas values
     #
     # @param cls
     # @param datas dict : Datas that have been returned by LeCrud.check_datas_value() methods
@@ -488,13 +492,13 @@ construction and consitency when datas are not complete\n")
     def _construct_datas(cls, datas):
         constructor = DatasConstructor(cls, datas, cls._fields)
         ret = {
-                fname:constructor[fname]
-                for fname, ftype in cls._fields.items()
-                if not ftype.is_internal() or ftype.internal != 'autosql'
+            fname: constructor[fname]
+            for fname, ftype in cls._fields.items()
+            if not ftype.is_internal() or ftype.internal != 'autosql'
         }
         return ret
-    
-    ## @brief Check datas consistency
+
+    # @brief Check datas consistency
     # 
     # @warning assert that datas is complete
     # @param cls
@@ -511,29 +515,29 @@ construction and consitency when datas are not complete\n")
 
         if len(err_l) > 0:
             raise LeApiDataCheckError("Datas consistency checks fails", err_l)
-    
-    ## @brief Check datas consistency
+
+    # @brief Check datas consistency
     # 
     # @warning assert that datas is complete
     # @param cls
     # @param datas dict : Datas that have been returned by LeCrud.prepare_datas() method
     # @param type_query str : Type of query to be performed , default value : insert
     @classmethod
-    def make_consistency(cls, datas, type_query = 'insert'):
+    def make_consistency(cls, datas, type_query='insert'):
         for fname, dh in cls._fields.items():
             ret = dh.make_consistency(fname, datas, type_query)
-            
-    ## @brief Add a new instance of LeObject
+
+    # @brief Add a new instance of LeObject
     # @return a new uid en case of success, False otherwise
     @classmethod
     def insert(cls, datas):
         query = LeInsertQuery(cls)
         return query.execute(datas)
 
-    ## @brief Update an instance of LeObject
+    # @brief Update an instance of LeObject
     #
-    #@param datas : list of new datas 
-    def update(self, datas = None):
+    #@param datas : list of new datas
+    def update(self, datas=None):
         datas = self.datas(internal=False) if datas is None else datas
         uids = self._uid
         query_filter = list()
@@ -543,15 +547,15 @@ construction and consitency when datas are not complete\n")
             query = LeUpdateQuery(self.__class__, query_filter)
         except Exception as err:
             raise err
-            
+
         try:
             result = query.execute(datas)
         except Exception as err:
             raise err
 
         return result
-    
-    ## @brief Delete an instance of LeObject
+
+    # @brief Delete an instance of LeObject
     #
     #@return 1 if the objet has been deleted
     def delete(self):
@@ -565,8 +569,8 @@ construction and consitency when datas are not complete\n")
         result = query.execute()
 
         return result
-    
-    ## @brief Delete instances of LeObject
+
+    # @brief Delete instances of LeObject
     #@param query_filters list
     #@returns the number of deleted items
     @classmethod
@@ -576,7 +580,7 @@ construction and consitency when datas are not complete\n")
             query = LeDeleteQuery(cls, query_filters)
         except Exception as err:
             raise err
-                
+
         try:
             result = query.execute()
         except Exception as err:
@@ -584,11 +588,11 @@ construction and consitency when datas are not complete\n")
         if not result is None:
             deleted += result
         return deleted
-            
-    ## @brief Get instances of LeObject
+
+    # @brief Get instances of LeObject
     #
     #@param query_filters dict : (filters, relational filters), with filters is a list of tuples : (FIELD, OPERATOR, VALUE) )
-    #@param field_list list|None : list of string representing fields see 
+    #@param field_list list|None : list of string representing fields see
     #@ref leobject_filters
     #@param order list : A list of field names or tuple (FIELDNAME,[ASC | DESC])
     #@param group list : A list of field names or tuple (FIELDNAME,[ASC | DESC])
@@ -598,49 +602,49 @@ construction and consitency when datas are not complete\n")
     @classmethod
     def get(cls, query_filters, field_list=None, order=None, group=None, limit=None, offset=0):
         if field_list is not None:
-            for uid in [ uidname
-                for uidname in cls.uid_fieldname()
-                if uidname not in field_list ]:
+            for uid in [uidname
+                        for uidname in cls.uid_fieldname()
+                        if uidname not in field_list]:
                 field_list.append(uid)
             if CLASS_ID_FIELDNAME not in field_list:
                 field_list.append(CLASS_ID_FIELDNAME)
         try:
             query = LeGetQuery(
-                cls, query_filters = query_filters, field_list = field_list,
-                order = order, group = group, limit = limit, offset = offset)
+                cls, query_filters=query_filters, field_list=field_list,
+                order=order, group=group, limit=limit, offset=offset)
         except ValueError as err:
             raise err
-            
+
         try:
             result = query.execute()
         except Exception as err:
             raise err
-        
+
         objects = list()
         for res in result:
             res_cls = cls.name2class(res[CLASS_ID_FIELDNAME])
-            inst = res_cls.__new__(res_cls,**res)
+            inst = res_cls.__new__(res_cls, **res)
             objects.append(inst)
-        
+
         return objects
-    
-    ##@brief Retrieve an object given an UID
+
+    # @brief Retrieve an object given an UID
     #@todo broken multiple UID
     @classmethod
     def get_from_uid(cls, uid):
         if cls.uid_fieldname() is None:
             raise LodelFatalError(
                 "No uid defined for class %s" % cls.__name__)
-        uidname = cls.uid_fieldname()[0] #Brokes composed UID
-        res = cls.get([(uidname,'=', uid)])
-        
-        #dedoublonnage vu que query ou la datasource est bugué
+        uidname = cls.uid_fieldname()[0]  # Brokes composed UID
+        res = cls.get([(uidname, '=', uid)])
+
+        # dedoublonnage vu que query ou la datasource est bugué
         if len(res) > 1:
             res_cp = res
             res = []
             while len(res_cp) > 0:
                 cur_res = res_cp.pop()
-                if cur_res.uid() in [ r.uid() for r in res_cp]:
+                if cur_res.uid() in [r.uid() for r in res_cp]:
                     logger.error("DOUBLON detected in query results !!!")
                 else:
                     res.append(cur_res)
@@ -651,7 +655,7 @@ object ! For class %s with uid value = %s" % (cls, uid))
             return None
         return res[0]
 
-    ##@brief Checks if an object exists
+    # @brief Checks if an object exists
     @classmethod
     def is_exist(cls, uid):
         if cls.uid_fieldname() is None:
@@ -659,4 +663,3 @@ object ! For class %s with uid value = %s" % (cls, uid))
                 "No uid defined for class %s" % cls.__name__)
         from .query import is_exist
         return is_exist(cls, uid)
-

lodel/mlnamedobject/Makefile.am

@@ -0,0 +1,2 @@
+mlnamedobject_PYTHON= *.py
+mlnamedobjectdir=$(pkgpythondir)/mlnamedobject

lodel/mlnamedobject/mlnamedobject.py

@@ -0,0 +1,18 @@
+#-*- coding:utf-8 -*-
+
+from lodel.context import LodelContext
+LodelContext.expose_modules(globals(), {
+    'lodel.utils.mlstring': ['MlString']})
+
+# @package lodel.mlnamedobject Lodel2 description of objects module
+#
+# Display name and Description of a lodel2 object
+
+# @brief Class allows display name and help text for lodel2 objects and fields
+
+
+class MlNamedObject(object):
+
+    def __init__(self, display_name=None, help_text=None):
+        self.display_name = None if display_name is None else MlString(display_name)
+        self.help_text = None if help_text is None else MlString(help_text)

lodel/plugin/datasource_plugin.py

@@ -3,7 +3,7 @@ LodelContext.expose_modules(globals(), {
     'lodel.plugin.plugins': ['Plugin'],
     'lodel.plugin.exceptions': ['PluginError', 'PluginTypeError',
         'LodelScriptError', 'DatasourcePluginError'],
-    'lodel.settings.validator': ['SettingValidator'],
+    'lodel.validator.validator': ['Validator'],
     'lodel.exceptions': ['LodelException', 'LodelExceptions',
         'LodelFatalError', 'DataNoneValid', 'FieldValidationError']})
 
@@ -97,7 +97,7 @@ class DatasourcePlugin(Plugin):
         'section': 'lodel2',
         'key': 'datasource_connectors',
         'default': 'dummy_datasource',
-        'validator': SettingValidator(
+        'validator': Validator(
             'custom_list', none_is_valid = False,
             validator_name = 'plugin', validator_kwargs = {
                 'ptype': _glob_typename,
@@ -280,13 +280,13 @@ but %s is a %s" % (ds_name, pinstance.__class__.__name__))
 #CONFSPEC = {
 #                'lodel2.datasource.mysql.*' : {
 #                    'host': (   'localhost',
-#                                SettingValidator('host')),
+#                                Validator('host')),
 #                    'db_name': (    'lodel',
-#                                    SettingValidator('string')),
+#                                    Validator('string')),
 #                    'username': (   None,
-#                                    SettingValidator('string')),
+#                                    Validator('string')),
 #                    'password': (   None,
-#                                    SettingValidator('string')),
+#                                    Validator('string')),
 #                }
 #}
 #</pre>

lodel/plugin/extensions.py

@@ -3,7 +3,7 @@ LodelContext.expose_modules(globals(), {
     'lodel.plugin.plugins': ['Plugin'],
     'lodel.plugin.exceptions': ['PluginError', 'PluginTypeError',
         'LodelScriptError', 'DatasourcePluginError'],
-    'lodel.settings.validator': ['SettingValidator']})
+    'lodel.validator.validator': ['Validator']})
 
 _glob_typename = 'extension'
 
@@ -14,7 +14,7 @@ class Extension(Plugin):
         'section': 'lodel2',
         'key': 'extensions',
         'default': None,
-        'validator': SettingValidator(
+        'validator': Validator(
             'custom_list', none_is_valid = True,
             validator_name = 'plugin', validator_kwargs = {
                 'ptype': _glob_typename,

lodel/plugin/interface.py

@@ -3,7 +3,7 @@ LodelContext.expose_modules(globals(), {
     'lodel.plugin.plugins': ['Plugin'],
     'lodel.plugin.exceptions': ['PluginError', 'PluginTypeError',
         'LodelScriptError', 'DatasourcePluginError'],
-    'lodel.settings.validator': ['SettingValidator']})
+    'lodel.validator.validator': ['Validator']})
 
 _glob_typename = 'ui'
 
@@ -19,7 +19,7 @@ class InterfacePlugin(Plugin):
         'section': 'lodel2',
         'key': 'interface',
         'default': None,
-        'validator': SettingValidator(
+        'validator': Validator(
             'plugin', none_is_valid = True, ptype = _glob_typename)}
 
     _type_conf_name = _glob_typename

lodel/plugin/sessionhandler.py

@@ -3,7 +3,7 @@ LodelContext.expose_modules(globals(), {
     'lodel.plugin.plugins': ['Plugin', 'MetaPlugType'],
     'lodel.plugin.exceptions': ['PluginError', 'PluginTypeError',
         'LodelScriptError', 'DatasourcePluginError'],
-    'lodel.settings.validator': ['SettingValidator']})
+    'lodel.validator.validator': ['Validator']})
 
 
 ##@brief SessionHandlerPlugin metaclass designed to implements a wrapper
@@ -53,7 +53,7 @@ class SessionHandlerPlugin(Plugin, metaclass=SessionPluginWrapper):
         'section': 'lodel2',
         'key': 'session_handler',
         'default': None,
-        'validator': SettingValidator(
+        'validator': Validator(
             'plugin', none_is_valid=False,ptype = _glob_typename)}
 
     _type_conf_name = _glob_typename

lodel/plugins/dummy/__init__.py

@@ -1,6 +1,6 @@
 from lodel.context import LodelContext
 LodelContext.expose_modules(globals(), {
-    'lodel.settings.validator': ['SettingValidator']})
+    'lodel.validator.validator': ['Validator']})
 
 __plugin_name__ = "dummy"
 __version__ = '0.0.1' #or __version__ = [0,0,1]

lodel/plugins/dummy/confspec.py

@@ -2,11 +2,11 @@
 
 from lodel.context import LodelContext
 LodelContext.expose_modules(globals(), {
-    'lodel.settings.validator': ['SettingValidator']})
+    'lodel.validator.validator': ['Validator']})
 
 CONFSPEC = {
     'lodel2.section1': {
         'key1': (   None,
-                    SettingValidator('dummy'))
+                    Validator('dummy'))
     }
 }

lodel/plugins/dummy_datasource/__init__.py

@@ -1,6 +1,6 @@
 from lodel.context import LodelContext
 LodelContext.expose_modules(globals(), {
-    'lodel.settings.validator': ['SettingValidator']})
+    'lodel.validator.validator': ['Validator']})
 from .datasource import DummyDatasource as Datasource
 
 __plugin_type__ = 'datasource'
@@ -12,7 +12,7 @@ __plugin_deps__ = []
 CONFSPEC = {
     'lodel2.datasource.dummy_datasource.*' : {
         'dummy': (  None,
-                    SettingValidator('dummy'))}
+                    Validator('dummy'))}
 }
 
 

lodel/plugins/filesystem_session/__init__.py

@@ -1,6 +1,6 @@
 from lodel.context import LodelContext
 LodelContext.expose_modules(globals(), {
-    'lodel.settings.validator': ['SettingValidator']})
+    'lodel.validator.validator': ['Validator']})
 
 __plugin_name__ = 'filesystem_session'
 __version__ = [0,0,1]

lodel/plugins/filesystem_session/confspec.py

@@ -2,12 +2,12 @@
 
 from lodel.context import LodelContext
 LodelContext.expose_modules(globals(), {
-    'lodel.settings.validator': ['SettingValidator']})
+    'lodel.validator.validator': ['Validator']})
 
 CONFSPEC = {
     'lodel2.sessions':{
-        'directory': ('/tmp/', SettingValidator('path')),
-        'expiration': (900, SettingValidator('int')),
-        'file_template': ('lodel2_%s.sess', SettingValidator('dummy'))
+        'directory': ('/tmp/', Validator('path')),
+        'expiration': (900, Validator('int')),
+        'file_template': ('lodel2_%s.sess', Validator('dummy'))
     }
 }

lodel/plugins/mongodb_datasource/confspec.py

@@ -2,7 +2,7 @@
 
 from lodel.context import LodelContext
 LodelContext.expose_modules(globals(), {
-    'lodel.settings.validator': ['SettingValidator']})
+    'lodel.validator.validator': ['Validator']})
 
 ##@brief Mongodb datasource plugin confspec
 #@ingroup plugin_mongodb_datasource
@@ -10,11 +10,11 @@ LodelContext.expose_modules(globals(), {
 #Describe mongodb plugin configuration. Keys are :
 CONFSPEC = {
     'lodel2.datasource.mongodb_datasource.*':{
-        'read_only': (False, SettingValidator('bool')),
-        'host': ('localhost', SettingValidator('host')),
-        'port': (None, SettingValidator('string', none_is_valid = True)),
-        'db_name':('lodel', SettingValidator('string')),
-        'username': (None, SettingValidator('string')),
-        'password': (None, SettingValidator('string'))
+        'read_only': (False, Validator('bool')),
+        'host': ('localhost', Validator('host')),
+        'port': (None, Validator('string', none_is_valid = True)),
+        'db_name':('lodel', Validator('string')),
+        'username': (None, Validator('string')),
+        'password': (None, Validator('string'))
     }
 }

lodel/plugins/multisite/__init__.py

@@ -1,7 +1,7 @@
 from lodel.context import LodelContext, ContextError
 try:
     LodelContext.expose_modules(globals(), {
-        'lodel.settings.validator': ['SettingValidator']})
+        'lodel.validator.validator': ['Validator']})
 
     __plugin_name__ = "multisite"
     __version__ = '0.0.1' #or __version__ = [0,0,1]
@@ -13,8 +13,8 @@ try:
 
     CONFSPEC = {
         'lodel2.server': {
-            'port': (80,SettingValidator('int')),
-            'listen_addr': ('', SettingValidator('string')),
+            'port': (80,Validator('int')),
+            'listen_addr': ('', Validator('string')),
         }
     }
 

lodel/plugins/multisite/confspecs.py

@@ -1,34 +1,34 @@
 from lodel.context import LodelContext
 LodelContext.expose_modules(globals(), {
-    'lodel.settings.validator': ['SettingValidator']})
+    'lodel.validator.validator': ['Validator']})
 
 #Define a minimal confspec used by multisite loader
 LODEL2_CONFSPECS = {
     'lodel2': {
-        'debug': (True, SettingValidator('bool'))
+        'debug': (True, Validator('bool'))
     },
     'lodel2.server': {
-        'listen_address': ('127.0.0.1', SettingValidator('dummy')),
-        #'listen_address': ('', SettingValidator('ip')), #<-- not implemented
-        'listen_port': ( 1337, SettingValidator('int')),
-        'uwsgi_workers': (8, SettingValidator('int')),
-        'uwsgicmd': ('/usr/bin/uwsgi', SettingValidator('dummy')),
-        'virtualenv': (None, SettingValidator('path', none_is_valid = True)),
+        'listen_address': ('127.0.0.1', Validator('dummy')),
+        #'listen_address': ('', Validator('ip')), #<-- not implemented
+        'listen_port': ( 1337, Validator('int')),
+        'uwsgi_workers': (8, Validator('int')),
+        'uwsgicmd': ('/usr/bin/uwsgi', Validator('dummy')),
+        'virtualenv': (None, Validator('path', none_is_valid = True)),
     },
     'lodel2.logging.*' : {
         'level': (  'ERROR',
-                    SettingValidator('loglevel')),
+                    Validator('loglevel')),
         'context': (    False,
-                        SettingValidator('bool')),
+                        Validator('bool')),
         'filename': (   None,
-                        SettingValidator('errfile', none_is_valid = True)),
+                        Validator('errfile', none_is_valid = True)),
         'backupcount': (    10,
-                            SettingValidator('int', none_is_valid = False)),
+                            Validator('int', none_is_valid = False)),
         'maxbytes': (   1024*10,
-                        SettingValidator('int', none_is_valid = False)),
+                        Validator('int', none_is_valid = False)),
     },
     'lodel2.datasources.*': {
-        'read_only': (False, SettingValidator('bool')),
-        'identifier': ( None, SettingValidator('string')),
+        'read_only': (False, Validator('bool')),
+        'identifier': ( None, Validator('string')),
     }
 }

lodel/plugins/ram_sessions/__init__.py

@@ -1,6 +1,6 @@
 from lodel.context import LodelContext
 LodelContext.expose_modules(globals(), {
-    'lodel.settings.validator': ['SettingValidator']})
+    'lodel.validator.validator': ['Validator']})
 
 __plugin_name__ = 'ram_sessions'
 __version__ = [0,0,1]
@@ -11,7 +11,7 @@ __fullname__ = "RAM Session Store Plugin"
 
 CONFSPEC = {
     'lodel2.sessions':{
-        'expiration': (900, SettingValidator('int')),
-        'tokensize': (512, SettingValidator('int')),
+        'expiration': (900, Validator('int')),
+        'tokensize': (512, Validator('int')),
     }
 }

lodel/plugins/webui/confspec.py

@@ -1,30 +1,30 @@
 from lodel.context import LodelContext
 LodelContext.expose_modules(globals(), {
-    'lodel.settings.validator': ['SettingValidator']})
+    'lodel.validator.validator': ['Validator']})
 
 CONFSPEC = {
     'lodel2.webui': {
         'standalone': ( 'False',
-                        SettingValidator('string')),
+                        Validator('string')),
         'listen_address': ( '127.0.0.1',
-                            SettingValidator('dummy')),
+                            Validator('dummy')),
         'listen_port': (    '9090',
-                            SettingValidator('int')),
+                            Validator('int')),
         'static_url': (     'http://127.0.0.1/static/',
-                            SettingValidator('regex', pattern =  r'^https?://[^/].*$')),
+                            Validator('regex', pattern =  r'^https?://[^/].*$')),
         'virtualenv': (None,
-                       SettingValidator('path', none_is_valid=True)),
-        'uwsgicmd': ('/usr/bin/uwsgi', SettingValidator('dummy')),
-        'cookie_secret_key': ('ConfigureYourOwnCookieSecretKey', SettingValidator('dummy')),
-        'cookie_session_id': ('lodel', SettingValidator('dummy')),
-        'uwsgi_workers': (2, SettingValidator('int'))
+                       Validator('path', none_is_valid=True)),
+        'uwsgicmd': ('/usr/bin/uwsgi', Validator('dummy')),
+        'cookie_secret_key': ('ConfigureYourOwnCookieSecretKey', Validator('dummy')),
+        'cookie_session_id': ('lodel', Validator('dummy')),
+        'uwsgi_workers': (2, Validator('int'))
     },
     'lodel2.webui.sessions': {
         'directory': (  '/tmp',
-                        SettingValidator('path')),
+                        Validator('path')),
         'expiration': ( 900,
-                        SettingValidator('int')),
+                        Validator('int')),
         'file_template': (  'lodel2_%s.sess',
-                            SettingValidator('dummy')),
+                            Validator('dummy')),
     }
 }

lodel/plugins/webui/templates/listing/issue.html

@@ -4,7 +4,7 @@
 {% set objects = my_classes.Issue.get(('%s = %s') % (uidfield, lodel_id)) %}
 {% set person_class = leapi.name2class('Person') %}
 {% set obj = objects.pop() %}
-{% block content %} 
+{% block content %}
 <ol class="breadcrumb">
   <li><a href="/{{ root_url }}/">Home</a></li>
   <li><a href="/{{ root_url }}/collection">Collections</a></li>
@@ -13,14 +13,14 @@
 <h1 class="h1_lodel">Issue {{ obj.data('title') }} </h1>
 <h2>{{ obj.data('subtitle') }}</h2>
 {% set directors=person_class.get(("%s in (%s)") % (person_class.uid_fieldname()[0], obj.data('linked_directors')|join(','))) %}
-<p><strong>Directors : </strong>{% for director in directors %} <a href="/{{ root_url }}/show_object?classname=Person&lodel_id={{ director.uid() }} " target="_blank" >{{ director.data('firstname')}} {{ director.data('lastname')}}</a> ; {% endfor %}</p>
+<p><strong>Directors : </strong>{% for director in directors %} <a href="/{{ root_url }}/show_object?classname=Person&lodel_id={{ director.uid() }} " >{{ director.data('firstname')}} {{ director.data('lastname')}}</a> ; {% endfor %}</p>
 {% set texts=my_classes.Text.get(("%s in (%s)") % (my_classes.Text.uid_fieldname()[0], obj.data('linked_texts')|join(','))) %}
 {% set parts=my_classes.Part.get(("%s in (%s)") % (my_classes.Part.uid_fieldname()[0], obj.data('linked_parts')|join(','))) %}
 {% if texts is not none: %}
     <ul>
      {% for text in texts %}
           <li>
-              <h3><a href="/{{ root_url }}/show_object?classname={{ text.data('classname') }}&lodel_id={{ text.uid() }}" target="_blank" > {{ text.data('title') }}</a></h3>
+              <h3><a href="/{{ root_url }}/show_object?classname={{ text.data('classname') }}&lodel_id={{ text.uid() }}" > {{ text.data('title') }}</a></h3>
               <h4>{{ text.data('subtitle') }}</h4>
               {% set authors = my_classes.Person.get(("%s in (%s)") % (person_class.uid_fieldname()[0], text.data('linked_persons')|join(','))) %}
               <p>Authors : {% for author in authors %} {{ author.data('firstname')}} {{ author.data('lastname')}} ; {% endfor %} </p>
@@ -34,7 +34,7 @@
 <ul>
      {% for part in parts %}
           <li>
-              <h3><a href="/{{ root_url }}/show_object?classname={{ part.data('classname') }}&lodel_id={{ part.uid() }}" target="_blank"> {{ part.data('title') }}</a></h3>
+              <h3><a href="/{{ root_url }}/show_object?classname={{ part.data('classname') }}&lodel_id={{ part.uid() }}"> {{ part.data('title') }}</a></h3>
               <h4>{{ part.data('subtitle') }}</h4>
               {% set directors = my_classes.Person.get(("%s in (%s)") % (person_class.uid_fieldname()[0], part.data('linked_directors')|join(','))) %}
               <p>Directors : {% for director in directors %} {{ director.data('firstname')}} {{ director.data('lastname')}} ; {% endfor %} </p>
@@ -43,7 +43,7 @@
               <ul style="margin-left:20px">
                  {% for text in p_texts %}
                       <li>
-                          <h3><a href="/{{ root_url }}/show_object?classname={{ text.data('classname') }}&lodel_id={{ text.uid() }}"  target="_blank"> {{ text.data('title') }}</a></h3>
+                          <h3><a href="/{{ root_url }}/show_object?classname={{ text.data('classname') }}&lodel_id={{ text.uid() }}" > {{ text.data('title') }}</a></h3>
                           <h4>{{ text.data('subtitle') }}</h4>
                           {% set authors = my_classes.Person.get(("%s in (%s)") % (person_class.uid_fieldname()[0], text.data('linked_persons')|join(','))) %}
                           <p>Authors : {% for author in authors %} {{ author.data('firstname')}} {{ author.data('lastname')}} ; {% endfor %} </p>
@@ -57,7 +57,7 @@
                 <ul>
                      {% for part in ss_parts %}
                           <li>
-                              <h3><a href="/{{ root_url }}/show_object?classname={{ part.data('classname') }}&lodel_id={{ part.uid() }}" target="_blank"> {{ part.data('title') }}</a></h3>
+                              <h3><a href="/{{ root_url }}/show_object?classname={{ part.data('classname') }}&lodel_id={{ part.uid() }}" > {{ part.data('title') }}</a></h3>
                               <h4>{{ part.data('subtitle') }}</h4>
                               {% set directors = my_classes.Person.get(("%s in (%s)") % (person_class.uid_fieldname()[0], part.data('linked_directors')|join(','))) %}
                               <p>Directors : {% for director in directors %} {{ director.data('firstname')}} {{ director.data('lastname')}} ; {% endfor %} </p>
@@ -66,7 +66,7 @@
                               <ul style="margin-left:20px">
                                  {% for text in sp_texts %}
                                       <li>
-                                          <h3><a href="/{{ root_url }}/show_object?classname={{ text.data('classname') }}&lodel_id={{ text.uid() }}"  target="_blank"> {{ text.data('title') }}</a></h3>
+                                          <h3><a href="/{{ root_url }}/show_object?classname={{ text.data('classname') }}&lodel_id={{ text.uid() }}" > {{ text.data('title') }}</a></h3>
                                           <h4>{{ text.data('subtitle') }}</h4>
                                           {% set authors = my_classes.Person.get(("%s in (%s)") % (person_class.uid_fieldname()[0], text.data('linked_persons')|join(','))) %}
                                           <p>Authors : {% for author in authors %} {{ author.data('firstname')}} {{ author.data('lastname')}} ; {% endfor %} </p>
@@ -84,4 +84,4 @@
 {% endif %}
 </div>
 
-{% endblock %} 
+{% endblock %}

lodel/settings/settings.py

@@ -5,40 +5,42 @@ import os
 import configparser
 import copy
 import warnings
-import types # for dynamic bindings
+import types  # for dynamic bindings
 from collections import namedtuple
 
 from lodel.context import LodelContext
 
-LodelContext.expose_modules(globals(),{
+LodelContext.expose_modules(globals(), {
     'lodel.logger': 'logger',
     'lodel.settings.utils': ['SettingsError', 'SettingsErrors'],
-    'lodel.settings.validator': ['SettingValidator', 'LODEL2_CONF_SPECS',
-        'confspec_append'],
-    'lodel.settings.settings_loader':['SettingsLoader']})
-    
+    'lodel.validator.validator': ['Validator', 'LODEL2_CONF_SPECS',
+                                  'confspec_append'],
+    'lodel.settings.settings_loader': ['SettingsLoader']})
 
-## @package lodel.settings.settings Lodel2 settings module
+
+#  @package lodel.settings.settings Lodel2 settings module
 #
 # Contains the class that handles the namedtuple tree of settings
 
-##@brief A default python system lib path
+# @brief A default python system lib path
 PYTHON_SYS_LIB_PATH = '/usr/local/lib/python{major}.{minor}/'.format(
 
-                                                major = sys.version_info.major,
-                                                minor = sys.version_info.minor)
+    major=sys.version_info.major,
+    minor=sys.version_info.minor)
+
 
 class MetaSettings(type):
+
     @property
     def s(self):
         self.singleton_assert(True)
         return self.instance.settings
 
-##@brief Handles configuration load etc.
+# @brief Handles configuration load etc.
 #
-# To see howto bootstrap Settings and use it in lodel instance see 
+# To see howto bootstrap Settings and use it in lodel instance see
 # @ref lodel.settings
-# 
+#
 # @par Basic instance usage
 # For example if a file defines confs like :
 # <pre>
@@ -50,15 +52,15 @@ class MetaSettings(type):
 #
 # @par Init sequence
 # The initialization sequence is a bit tricky. In fact, plugins adds allowed
-# configuration sections/values, but the list of plugins to load are in... the 
+# configuration sections/values, but the list of plugins to load are in... the
 # settings.
 # Here is the conceptual presentation of Settings class initialization stages :
 #   -# Preloading (sets values like lodel2 library path or the plugins path)
-#   -# Ask a @ref lodel.settings.setting_loader.SettingsLoader to load all 
-#configurations files
+#   -# Ask a @ref lodel.settings.setting_loader.SettingsLoader to load all
+# configurations files
 #   -# Fetch the list of plugins in the loaded settings
-#   -# Merge plugins settings specification with the global lodel settings 
-#specs ( see @ref lodel.plugin )
+#   -# Merge plugins settings specification with the global lodel settings
+# specs ( see @ref lodel.plugin )
 #   -# Fetch all settings from the merged settings specs
 #
 # @par Init sequence in practical
@@ -68,39 +70,41 @@ class MetaSettings(type):
 #   -# @ref Settings.__populate_from_specs() (step 5)
 #   -# And finally @ref Settings.__confs_to_namedtuple()
 #
-# @todo handles default sections for variable sections (sections ending with 
+# @todo handles default sections for variable sections (sections ending with
 # '.*')
 # @todo delete the first stage, the lib path HAVE TO BE HARDCODED. In fact
-#when we will run lodel in production the lodel2 lib will be in the python path
+# when we will run lodel in production the lodel2 lib will be in the python path
 #@todo add log messages (now we can)
+
+
 class Settings(object, metaclass=MetaSettings):
 
-    ## @brief Stores the singleton instance
+    #  @brief Stores the singleton instance
     instance = None
-    
-    ## @brief Instanciate the Settings singleton
+
+    #  @brief Instanciate the Settings singleton
     # @param conf_dir str : The configuration directory
     #@param custom_confspecs None | dict : if given overwrite default lodel2
-    #confspecs
-    def __init__(self, conf_dir, custom_confspecs = None):
-        self.singleton_assert() # check that it is the only instance
+    # confspecs
+    def __init__(self, conf_dir, custom_confspecs=None):
+        self.singleton_assert()  # check that it is the only instance
         Settings.instance = self
-        ## @brief Configuration specification
+        #  @brief Configuration specification
         #
         # Initialized by Settings.__bootstrap() method
         self.__conf_specs = custom_confspecs
-        ## @brief Stores the configurations in namedtuple tree
+        #  @brief Stores the configurations in namedtuple tree
         self.__confs = None
         self.__conf_dir = conf_dir
         self.__started = False
         self.__bootstrap()
-    
-    ## @brief Get the named tuple representing configuration
+
+    #  @brief Get the named tuple representing configuration
     @property
     def settings(self):
         return self.__confs.lodel2
-    
-    ## @brief Delete the singleton instance
+
+    #  @brief Delete the singleton instance
     @classmethod
     def stop(cls):
         del(cls.instance)
@@ -110,7 +114,7 @@ class Settings(object, metaclass=MetaSettings):
     def started(cls):
         return cls.instance is not None and cls.instance.__started
 
-    ##@brief An utility method that raises if the singleton is not in a good
+    # @brief An utility method that raises if the singleton is not in a good
     # state
     #@param expect_instanciated bool : if True we expect that the class is
     # allready instanciated, else not
@@ -124,17 +128,17 @@ class Settings(object, metaclass=MetaSettings):
             if cls.started():
                 raise RuntimeError("The Settings class is already started")
 
-    ##@brief Saves a new configuration for section confname
+    # @brief Saves a new configuration for section confname
     #@param confname is the name of the modified section
     #@param confvalue is a dict with variables to save
     #@param validator is a dict with adapted validator
     @classmethod
-    def set(cls, confname, confvalue,validator):
+    def set(cls, confname, confvalue, validator):
         loader = SettingsLoader(cls.instance.__conf_dir)
-        confkey=confname.rpartition('.')
+        confkey = confname.rpartition('.')
         loader.setoption(confkey[0], confkey[2], confvalue, validator)
 
-    ##@brief This method handles Settings instance bootstraping
+    # @brief This method handles Settings instance bootstraping
     def __bootstrap(self):
         LodelContext.expose_modules(globals(), {
             'lodel.plugin.plugins': ['Plugin', 'PluginError']})
@@ -144,9 +148,9 @@ class Settings(object, metaclass=MetaSettings):
         else:
             lodel2_specs = self.__conf_specs
             self.__conf_specs = None
-        loader = SettingsLoader(self.__conf_dir) 
+        loader = SettingsLoader(self.__conf_dir)
         plugin_list = []
-        for ptype_name,ptype in Plugin.plugin_types().items():
+        for ptype_name, ptype in Plugin.plugin_types().items():
             pls = ptype.plist_confspecs()
             lodel2_specs = confspec_append(lodel2_specs, **pls)
             cur_list = loader.getoption(
@@ -162,13 +166,15 @@ class Settings(object, metaclass=MetaSettings):
                 plugin_list += cur_list
             except TypeError:
                 plugin_list += [cur_list]
-        #Checking confspecs
+        # Checking confspecs
         for section in lodel2_specs:
             if section.lower() != section:
-                raise SettingsError("Only lower case are allowed in section name (thank's ConfigParser...)")
+                raise SettingsError(
+                    "Only lower case are allowed in section name (thank's ConfigParser...)")
             for kname in lodel2_specs[section]:
                 if kname.lower() != kname:
-                    raise SettingsError("Only lower case are allowed in section name (thank's ConfigParser...)")
+                    raise SettingsError(
+                        "Only lower case are allowed in section name (thank's ConfigParser...)")
 
         # Starting the Plugins class
         logger.debug("Starting lodel.plugin.Plugin class")
@@ -181,13 +187,13 @@ class Settings(object, metaclass=MetaSettings):
                 specs.append(Plugin.get(plugin_name).confspecs)
             except PluginError as e:
                 errors.append(SettingsError(msg=str(e)))
-        if len(errors) > 0: #Raise all plugins import errors
+        if len(errors) > 0:  # Raise all plugins import errors
             raise SettingsErrors(errors)
         self.__conf_specs = self.__merge_specs(specs)
         self.__populate_from_specs(self.__conf_specs, loader)
         self.__started = True
-    
-    ##@brief Produce a configuration specification dict by merging all specifications
+
+    # @brief Produce a configuration specification dict by merging all specifications
     #
     # Merges global lodel2 conf spec from @ref lodel.settings.validator.LODEL2_CONF_SPECS
     # and configuration specifications from loaded plugins
@@ -198,31 +204,35 @@ class Settings(object, metaclass=MetaSettings):
         for spec in specs:
             for section in spec:
                 if section.lower() != section:
-                    raise SettingsError("Only lower case are allowed in section name (thank's ConfigParser...)")
+                    raise SettingsError(
+                        "Only lower case are allowed in section name (thank's ConfigParser...)")
                 if section not in res:
                     res[section] = dict()
                 for kname in spec[section]:
                     if kname.lower() != kname:
-                        raise SettingsError("Only lower case are allowed in section name (thank's ConfigParser...)")
+                        raise SettingsError(
+                            "Only lower case are allowed in section name (thank's ConfigParser...)")
                     if kname in res[section]:
-                        raise SettingsError("Duplicated key '%s' in section '%s'" % (kname, section))
+                        raise SettingsError("Duplicated key '%s' in section '%s'" %
+                                            (kname, section))
                     res[section.lower()][kname] = copy.copy(spec[section][kname])
         return res
-    
-    ##@brief Populate the Settings instance with options values fetched with the loader from merged specs
+
+    # @brief Populate the Settings instance with options values fetched with the loader from merged specs
     #
     # Populate the __confs attribute
     # @param specs dict : Settings specification dictionnary as returned by __merge_specs
     # @param loader SettingsLoader : A SettingsLoader instance
     def __populate_from_specs(self, specs, loader):
         self.__confs = dict()
-        specs = copy.copy(specs) #Avoid destroying original specs dict (may be useless)
+        specs = copy.copy(specs)  # Avoid destroying original specs dict (may be useless)
         # Construct final specs dict replacing variable sections
         # by the actual existing sections
-        variable_sections = [ section for section in specs if section.endswith('.*') ]
+        variable_sections = [section for section in specs if section.endswith('.*')]
         for vsec in variable_sections:
             preffix = vsec[:-2]
-            for section in loader.getsection(preffix, 'default'): #WARNING : hardcoded default section
+            # WARNING : hardcoded default section
+            for section in loader.getsection(preffix, 'default'):
                 specs[section] = copy.copy(specs[vsec])
             del(specs[vsec])
         # Fetching values for sections
@@ -238,8 +248,8 @@ class Settings(object, metaclass=MetaSettings):
 
         self.__confs_to_namedtuple()
         pass
-    
-    ##@brief Transform the __confs attribute into imbricated namedtuple
+
+    # @brief Transform the __confs attribute into imbricated namedtuple
     #
     # For example an option named "foo" in a section named "hello.world" will
     # be acessible with self.__confs.hello.world.foo
@@ -257,7 +267,7 @@ class Settings(object, metaclass=MetaSettings):
             section_name = ""
             cur = section_tree
             for sec_part in spl:
-                section_name += sec_part+'.'
+                section_name += sec_part + '.'
                 if sec_part not in cur:
                     cur[sec_part] = dict()
                 cur = cur[sec_part]
@@ -267,35 +277,35 @@ class Settings(object, metaclass=MetaSettings):
                     raise SettingsError("Duplicated key for '%s.%s'" % (section_name, kname))
                 cur[kname] = kval
 
-        path = [ ('root', section_tree) ]
+        path = [('root', section_tree)]
         visited = set()
-        
+
         curname = 'root'
         nodename = 'Lodel2Settings'
         cur = section_tree
         while True:
             visited.add(nodename)
-            left = [    (kname, cur[kname])
-                        for kname in cur
-                        if nodename+'.'+kname.title() not in visited and isinstance(cur[kname], dict)
+            left = [(kname, cur[kname])
+                    for kname in cur
+                    if nodename + '.' + kname.title() not in visited and isinstance(cur[kname], dict)
                     ]
             if len(left) == 0:
                 name, leaf = path.pop()
                 typename = nodename.replace('.', '')
                 if len(path) == 0:
                     # END
-                    self.__confs = self.__tree2namedtuple(leaf,typename)
+                    self.__confs = self.__tree2namedtuple(leaf, typename)
                     break
                 else:
-                    path[-1][1][name] = self.__tree2namedtuple(leaf,typename)
+                    path[-1][1][name] = self.__tree2namedtuple(leaf, typename)
                 nodename = '.'.join(nodename.split('.')[:-1])
                 cur = path[-1][1]
             else:
                 curname, cur = left[0]
-                path.append( (curname, cur) )
+                path.append((curname, cur))
                 nodename += '.' + curname.title()
-    
-    ##@brief Forge a named tuple given a conftree node
+
+    # @brief Forge a named tuple given a conftree node
     # @param conftree dict : A conftree node
     # @param name str
     # @return a named tuple with fieldnames corresponding to conftree keys
@@ -303,11 +313,13 @@ class Settings(object, metaclass=MetaSettings):
         ResNamedTuple = namedtuple(name, conftree.keys())
         return ResNamedTuple(**conftree)
 
+
 class MetaSettingsRO(type):
+
     def __getattr__(self, name):
         return getattr(Settings.s, name)
-        
 
-## @brief A class that provide . notation read only access to configurations
+
+#  @brief A class that provide . notation read only access to configurations
 class SettingsRO(object, metaclass=MetaSettingsRO):
     pass

lodel/settings/settings_loader.py

@@ -8,28 +8,27 @@ from lodel.context import LodelContext
 
 LodelContext.expose_modules(globals(), {
     'lodel.logger': 'logger',
-    'lodel.settings.utils': ['SettingsError', 'SettingsErrors'],
-    'lodel.settings.validator': ['SettingsValidationError']})
+    'lodel.settings.utils': ['SettingsError', 'SettingsErrors']})
 
 ##@brief Merges and loads configuration files
 class SettingsLoader(object):
-    
+
     ## To avoid the DEFAULT section whose values are found in all sections, we
     # have to give it an unsual name
     DEFAULT_SECTION = 'lodel2_default_passaway_tip'
-    
+
     ## @brief Virtual filename when default value is used
     DEFAULT_FILENAME = 'default_value'
 
     ##@brief Constructor
     # @param conf_path str : conf.d path
-    def __init__(self,conf_path):
-        self.__conf_path=conf_path
-        self.__conf_sv=dict()
-        self.__conf=self.__merge()
+    def __init__(self, conf_path):
+        self.__conf_path = conf_path
+        self.__conf_sv = dict()
+        self.__conf = self.__merge()
         # Stores errors
         self.__errors_list = []
-    
+
     ##@brief Lists and merges files in settings_loader.conf_path
     # @return dict()
     def __merge(self):
@@ -38,26 +37,24 @@ class SettingsLoader(object):
         logger.debug("SettingsLoader found those settings files : %s" % (
             ', '.join(l_dir)))
 
-        for f_ini in l_dir:  
-            config = configparser.ConfigParser(default_section = self.DEFAULT_SECTION ,interpolation=None)
+        for f_ini in l_dir:
+            config = configparser.ConfigParser(default_section=self.DEFAULT_SECTION, interpolation=None)
             config.read(f_ini)
-            for section in [ s for s in config if s != self.DEFAULT_SECTION ]:
+            for section in [s for s in config if s != self.DEFAULT_SECTION]:
                 if section not in conf:
                     conf[section] = dict()
                 for param in config[section]:
-                    if param not in conf[section]: 
-                        conf[section][param]=dict()
+                    if param not in conf[section]:
+                        conf[section][param] = dict()
                         conf[section][param]['value'] = config[section][param]
                         conf[section][param]['file'] = f_ini
-                        self.__conf_sv[section + ':' + param]=f_ini
+                        self.__conf_sv[section + ':' + param] = f_ini
                     else:
-                        raise SettingsError("Error redeclaration of key %s in section %s. Found in %s and %s" % (
-            section,
-            param,
-            f_ini,
-            conf[section][param]['file']))
+                        raise SettingsError("Error redeclaration of key %s \
+                            in section %s. Found in %s and %s" % (\
+                            section, param, f_ini, conf[section][param]['file']))
         return conf
-    
+
     ##@brief Returns option if exists default_value else and validates
     # @param section str : name of the section
     # @param keyname str
@@ -65,8 +62,8 @@ class SettingsLoader(object):
     # @param default_value *
     # @param mandatory bool
     # @return the option
-    def getoption(self,section,keyname,validator,default_value=None,mandatory=False):
-        conf=self.__conf
+    def getoption(self, section, keyname, validator, default_value=None, mandatory=False):
+        conf = self.__conf
         if section not in conf:
             conf[section] = dict()
 
@@ -85,35 +82,31 @@ class SettingsLoader(object):
         if result is None:
             if default_value is None and mandatory:
                 msg = "Default value mandatory for option %s" % keyname
-                expt = SettingsError(   msg = msg,
-                                        key_id = section+'.'+keyname,
-                                        filename = sec[keyname]['file'])
+                expt = SettingsError(msg=msg, key_id=section+'.'+keyname, \
+                    filename=sec[keyname]['file'])
                 self.__errors_list.append(expt)
                 return
             else:
-                sec[keyname]=dict()
+                sec[keyname] = dict()
                 sec[keyname]['value'] = default_value
                 sec[keyname]['file'] = SettingsLoader.DEFAULT_FILENAME
                 result = default_value
-                logger.debug("Using default value for configuration key %s:%s" % (
-                    section, keyname))
+                logger.debug("Using default value for configuration key %s:%s" \
+                    % (section, keyname))
 
         try:
             return validator(result)
         except Exception as e:
             # Generating nice exceptions
             if False and sec[keyname]['file'] == SettingsLoader.DEFAULT_FILENAME:
-                expt = SettingsError(   msg = 'Mandatory settings not found',
-                                        key_id = section+'.'+keyname)
+                expt = SettingsError(msg='Mandatory settings not found', \
+                                    key_id=section+'.'+keyname)
                 self.__errors_list.append(expt)
             else:
-                expt = SettingsValidationError(
-                                                "For %s.%s : %s" % 
-                                                (section, keyname,e)
-                )
-                expt2 = SettingsError(  msg = str(expt),
-                                        key_id = section+'.'+keyname,
-                                        filename = sec[keyname]['file'])
+                #expt = ValidationError("For %s.%s : %s" % (section, keyname, e))
+                expt2 = SettingsError(msg=str(expt), \
+                                        key_id=section+'.'+keyname, \
+                                        filename=sec[keyname]['file'])
                 self.__errors_list.append(expt2)
             return
 
@@ -123,38 +116,38 @@ class SettingsLoader(object):
     # @param value str
     # @param validator callable : takes one argument value and raises validation fail
     # @return the option
-    def setoption(self,section,keyname,value,validator):
-        f_conf=copy.copy(self.__conf[section][keyname]['file'])
+    def setoption(self, section, keyname, value, validator):
+        f_conf = copy.copy(self.__conf[section][keyname]['file'])
         if f_conf == SettingsLoader.DEFAULT_FILENAME:
             f_conf = self.__conf_path + '/generated.ini'
 
-        conf=self.__conf
+        conf = self.__conf
         conf[section][keyname] = value
         config = configparser.ConfigParser()
         config.read(f_conf)
         if section not in config:
-            config[section]={}
+            config[section] = {}
         config[section][keyname] = validator(value)
-        
+
         with open(f_conf, 'w') as configfile:
             config.write(configfile)
-            
+
     ##@brief Saves new partial configuration. Writes in the conf files corresponding
     # @param sections dict
     # @param validators dict of callable : takes one argument value and raises validation fail
     def saveconf(self, sections, validators):
         for sec in sections:
             for kname in sections[sec]:
-                self.setoption(sec,kname,sections[sec][kname],validators[sec][kname])
-    
+                self.setoption(sec, kname, sections[sec][kname], validators[sec][kname])
+
     ##@brief Returns the section to be configured
     # @param section_prefix str
     # @param default_section str
     # @return the section as dict()
-    def getsection(self,section_prefix,default_section=None):
-        conf=copy.copy(self.__conf)
-       
-        sections=[]
+    def getsection(self, section_prefix, default_section=None):
+        conf = copy.copy(self.__conf)
+
+        sections = []
         if section_prefix in conf:
             sections.append(section_prefix)
         for sect_names in conf:
@@ -162,34 +155,33 @@ class SettingsLoader(object):
                 pass
             elif sect_names.startswith(section_prefix + '.'):
                 sections.append(sect_names)
-        if sections == [] and default_section: 
-             sections.append(section_prefix + '.' + default_section)
+        if sections == [] and default_section:
+            sections.append(section_prefix + '.' + default_section)
         elif sections == []:
             raise NameError("Not existing settings section : %s" % section_prefix)
-            
+
         return sections
-    
+
     ##@brief Returns invalid settings
     #
-    # This method returns all the settings that was not fecthed by 
+    # This method returns all the settings that was not fecthed by
     # getsection() method. For the Settings object it allows to know
     # the list of invalids settings keys
     # @return a dict with SECTION_NAME+":"+KEY_NAME as key and the filename
     # where the settings was found as value
     def getremains(self):
         return self.__conf_sv
-    
+
     ##@brief Raise a SettingsErrors exception if some confs remains
     #@note typically used at the end of Settings bootstrap
     def raise_errors(self):
         remains = self.getremains()
         err_l = self.__errors_list
         for key_id, filename in remains.items():
-            err_l.append(SettingsError( msg = "Invalid configuration key",
-                                        key_id = key_id,
-                                        filename = filename))
+            err_l.append(SettingsError(msg="Invalid configuration key", \
+                                    key_id=key_id, \
+                                    filename =filename))
         if len(err_l) > 0:
             raise SettingsErrors(err_l)
         else:
             return
-

lodel/utils/datetime.py

@@ -6,4 +6,4 @@ def get_utc_timestamp():
     d = datetime.datetime.utcnow()
     epoch = datetime.datetime(1970, 1, 1)
     t = (d - epoch).total_seconds()
-    return t
+    return t

lodel/utils/mlstring.py

@@ -5,9 +5,9 @@ import hashlib
 import json
 
 
-##@brief Stores multilangage string
+# @brief Stores multilangage string
 class MlString(object):
-    
+
     __default_lang = 'eng'
 
     langs = [
@@ -17,7 +17,7 @@ class MlString(object):
         'esp',
     ]
 
-    ##@brief Create a new MlString instance
+    # @brief Create a new MlString instance
     # @param arg str | dict : Can be a json string, a string or a dict. It could be also a MlString object
     def __init__(self, arg):
         self.values = dict()
@@ -31,11 +31,12 @@ class MlString(object):
         elif isinstance(arg, MlString):
             self.values = copy.copy(arg.values)
         else:
-            raise ValueError('<class str>, <class dict> or <class MlString> expected, but %s found' % type(arg))
-    
-    ##@brief Return a translation given a lang
+            raise ValueError(
+                '<class str>, <class dict> or <class MlString> expected, but %s found' % type(arg))
+
+    # @brief Return a translation given a lang
     # @param lang str | None : If None return default lang translation
-    def get(self, lang = None):
+    def get(self, lang=None):
         lang = self.__default_lang if lang is None else lang
         if not self.lang_is_valid(lang):
             raise ValueError("Invalid lang : '%s'" % lang)
@@ -44,7 +45,7 @@ class MlString(object):
         else:
             return str(self)
 
-    ##@brief Set a translation
+    # @brief Set a translation
     # @param lang str : the lang
     # @param val str | None:  the translation if None delete the translation
     def set(self, lang, val):
@@ -57,7 +58,7 @@ class MlString(object):
         else:
             self.values[lang] = val
 
-    ##@brief Checks that given lang is valid
+    # @brief Checks that given lang is valid
     # @param lang str : the lang
     @classmethod
     def lang_is_valid(cls, lang):
@@ -65,16 +66,16 @@ class MlString(object):
             raise ValueError('Invalid value for lang. Str expected but %s found' % type(lang))
         return lang in cls.langs
 
-    ##@brief Get or set the default lang
+    # @brief Get or set the default lang
     @classmethod
-    def default_lang(cls, lang = None):
+    def default_lang(cls, lang=None):
         if lang is None:
             return cls.__default_lang
         if not cls.lang_is_valid(lang):
             raise ValueError('lang "%s" is not valid"' % lang)
         cls.__default_lang = lang
-    
-    ##@brief Return a mlstring loaded from a json string
+
+    # @brief Return a mlstring loaded from a json string
     # @param json_str str : Json string
     @classmethod
     def from_json(cls, json_str):
@@ -89,13 +90,13 @@ class MlString(object):
     def d_hash(self):
         m = hashlib.md5()
         for lang in sorted(list(self.values.keys())):
-            m.update(bytes(lang+";"+self.values[lang], 'utf-8'))
+            m.update(bytes(lang + ";" + self.values[lang], 'utf-8'))
         return int.from_bytes(m.digest(), byteorder='big')
 
     def __eq__(self, a):
         return hash(self) == hash(a)
-    
-    ## @return The default langage translation or any available translation
+
+    # @return The default langage translation or any available translation
     def __str__(self):
         if self.__default_lang in self.values:
             return self.values[self.__default_lang]

lodel/validator/Makefile.am

@@ -0,0 +1,2 @@
+validator_PYTHON=*.py
+validatordir=$(pkgpythondir)/validator

lodel/validator/__init__.py

@@ -0,0 +1,6 @@
+#-*- coding: utf-8 -*-
+
+## @package lodel.validator Lodel2 validator package
+#
+
+

lodel/settings/validator.py → lodel/validator/validator.py

@@ -9,55 +9,63 @@ import copy
 
 from lodel.context import LodelContext
 LodelContext.expose_modules(globals(), {
+    'lodel.mlnamedobject.mlnamedobject': ['MlNamedObject'],
     'lodel.exceptions': ['LodelException', 'LodelExceptions',
-        'LodelFatalError', 'FieldValidationError']})
+                         'LodelFatalError', 'FieldValidationError']})
 
-## @package lodel.settings.validator Lodel2 settings validators/cast module
+# @package lodel.settings.validator Lodel2 settings validators/cast module
 #
-# Validator are registered in the SettingValidator class.
+# Validator are registered in the Validator class.
 # @note to get a list of registered default validators just run
 # <pre>$ python scripts/settings_validator.py</pre>
 
-##@brief Exception class that should be raised when a validation fails
-class SettingsValidationError(Exception):
+# @brief Exception class that should be raised when a validation fails
+
+
+class ValidationError(Exception):
     pass
 
-##@brief Handles settings validators
+# @brief Handles settings validators
 #
 # Class instance are callable objects that takes a value argument (the value to validate). It raises
-# a SettingsValidationError if validation fails, else it returns a properly
+# a ValidationError if validation fails, else it returns a properly
 # casted value.
 #@todo implement an IP validator and use it in multisite confspec
-class SettingValidator(object):
-    
+
+
+class Validator(MlNamedObject):
+
     _validators = dict()
     _description = dict()
-    
-    ##@brief Instanciate a validator
+
+    # @brief Instanciate a validator
     #@param name str : validator name
     #@param none_is_valid bool : if True None will be validated
     #@param **kwargs : more arguement for the validator
-    def __init__(self, name, none_is_valid = False, **kwargs):
+    def __init__(self, name, none_is_valid=False, display_name=None, help_text=None, **kwargs):
         if name is not None and name not in self._validators:
             raise LodelFatalError("No validator named '%s'" % name)
         self.__none_is_valid = none_is_valid
         self.__name = name
         self._opt_args = kwargs
+        if display_name is None:
+            display_name = name
+        super().__init__(display_name, help_text)
 
-    ##@brief Call the validator
+    # @brief Call the validator
     # @param value *
     # @return properly casted value
-    # @throw SettingsValidationError
+    # @throw ValidationError
     def __call__(self, value):
         if self.__none_is_valid and value is None:
             return None
         try:
             ret = self._validators[self.__name](value, **self._opt_args)
             return ret
-        except Exception as e:
-            raise SettingsValidationError(e)
-    
-    ##@brief Register a new validator
+        except Exception as exp:
+            raise ValidationError(exp)
+
+    # @brief Register a new validator
     # @param name str : validator name
     # @param callback callable : the function that will validate a value
     # @param description str
@@ -70,76 +78,68 @@ class SettingValidator(object):
             raise TypeError("Callable expected but got %s" % type(callback))
         cls._validators[name] = callback
         cls._description[name] = description
-    
-    ##@brief Get the validator list associated with description
+
+    # @brief Get the validator list associated with description
     @classmethod
     def validators_list(cls):
         return copy.copy(cls._description)
 
-    ##@brief Create and register a list validator
+    # @brief Create and register a list validator
     # @param elt_validator callable : The validator that will be used for validate each elt value
     # @param validator_name str
     # @param description None | str
     # @param separator str : The element separator
-    # @return A SettingValidator instance
+    # @return A Validator instance
     @classmethod
-    def create_list_validator(cls, validator_name, elt_validator, description = None, separator = ','):
+    def create_list_validator(cls, validator_name, elt_validator, description=None, separator=','):
         def list_validator(value):
             res = list()
-            errors = list()
             for elt in value.split(separator):
                 elt = elt_validator(elt)
                 if len(elt) > 0:
                     res.append(elt)
             return res
         description = "Convert value to an array" if description is None else description
-        cls.register_validator(
-                                validator_name,
-                                list_validator,
-                                description)
+        cls.register_validator(validator_name, list_validator, description)
         return cls(validator_name)
- 
-    ##@brief Create and register a list validator which reads an array and returns a string
+
+    # @brief Create and register a list validator which reads an array and returns a string
     # @param elt_validator callable : The validator that will be used for validate each elt value
     # @param validator_name str
     # @param description None | str
     # @param separator str : The element separator
-    # @return A SettingValidator instance
+    # @return A Validator instance
     @classmethod
-    def create_write_list_validator(cls, validator_name, elt_validator, description = None, separator = ','):
+    def create_write_list_validator(cls, validator_name, elt_validator, description=None, separator=','):
         def write_list_validator(value):
             res = ''
-            errors = list()
             for elt in value:
                 res += elt_validator(elt) + ','
-            return res[:len(res)-1]
+            return res[:len(res) - 1]
         description = "Convert value to a string" if description is None else description
-        cls.register_validator(
-                                validator_name,
-                                write_list_validator,
-                                description)
+        cls.register_validator(validator_name, write_list_validator, description)
         return cls(validator_name)
-    
-    ##@brief Create and register a regular expression validator
+
+    # @brief Create and register a regular expression validator
     # @param pattern str : regex pattern
     # @param validator_name str : The validator name
     # @param description str : Validator description
-    # @return a SettingValidator instance
+    # @return a Validator instance
     @classmethod
-    def create_re_validator(cls, pattern, validator_name, description = None):
+    def create_re_validator(cls, pattern, validator_name, description=None):
         def re_validator(value):
             if not re.match(pattern, value):
-                raise SettingsValidationError("The value '%s' doesn't match the following pattern '%s'" % pattern)
+                raise ValidationError(
+                    "The value '%s' doesn't match the following pattern '%s'"
+                    % pattern)
             return value
-        #registering the validator
-        cls.register_validator(
-                                validator_name,
-                                re_validator,
-                                ("Match value to '%s'" % pattern) if description is None else description)
+        # registering the validator
+        cls.register_validator(validator_name, re_validator,
+                               ("Match value to '%s'" % pattern)
+                               if description is None else description)
         return cls(validator_name)
 
-    
-    ## @return a list of registered validators
+    #  @return a list of registered validators
     @classmethod
     def validators_list_str(cls):
         result = ''
@@ -150,20 +150,26 @@ class SettingValidator(object):
             result += "\n"
         return result
 
-##@brief Integer value validator callback
+# @brief Integer value validator callback
+
+
 def int_val(value):
     return int(value)
 
-##@brief Output file validator callback
+# @brief Output file validator callback
 # @return A file object (if filename is '-' return sys.stderr)
+
+
 def file_err_output(value):
     if not isinstance(value, str):
-        raise SettingsValidationError("A string was expected but got '%s' " % value)
+        raise ValidationError("A string was expected but got '%s' " % value)
     if value == '-':
         return None
     return value
 
-##@brief Boolean value validator callback
+# @brief Boolean value validator callback
+
+
 def boolean_val(value):
     if isinstance(value, bool):
         return value
@@ -172,52 +178,66 @@ def boolean_val(value):
     elif value.strip().lower() == 'false' or value.strip() == '0':
         value = False
     else:
-        raise SettingsValidationError("A boolean was expected but got '%s' " % value)
+        raise ValidationError("A boolean was expected but got '%s' " % value)
     return bool(value)
 
-##@brief Validate a directory path
+# @brief Validate a directory path
+
+
 def directory_val(value):
-    res = SettingValidator('strip')(value)
+    res = Validator('strip')(value)
     if not os.path.isdir(res):
-        raise SettingsValidationError("Folowing path don't exists or is not a directory : '%s'"%res)
+        raise ValidationError("Following path don't exists or is not a directory : '%s'" % res)
     return res
 
-##@brief Validate a loglevel value
+# @brief Validate a loglevel value
+
+
 def loglevel_val(value):
     valids = ['DEBUG', 'INFO', 'WARNING', 'SECURITY', 'ERROR', 'CRITICAL']
     if value.upper() not in valids:
-        raise SettingsValidationError(
-                "The value '%s' is not a valid loglevel" % value)
+        raise ValidationError(
+            "The value '%s' is not a valid loglevel" % value)
     return value.upper()
 
-##@brief Validate a path
+# @brief Validate a path
+
+
 def path_val(value):
     if value is None or not os.path.exists(value):
-        raise SettingsValidationError(
-                "path '%s' doesn't exists" % value)
+        raise ValidationError(
+            "path '%s' doesn't exists" % value)
     return value
 
-##@brief Validate None
+# @brief Validate None
+
+
 def none_val(value):
     if value is None:
         return None
-    raise SettingsValidationError("This settings cannot be set in configuration file")
+    raise ValidationError("This settings cannot be set in configuration file")
+
+# @brief Validate a string
+
 
-##@brief Validate a string
 def str_val(value):
     try:
         return str(value)
-    except Exception as e:
-        raise SettingsValidationError("Not able to convert value to string : " + str(e))
+    except Exception as exp:
+        raise ValidationError("Can't to convert value to string: " + str(exp))
+
+# @brief Validate using a regex
+
 
-##@brief Validate using a regex
 def regex_val(value, pattern):
     if re.match(pattern, value) is None:
-        raise SettingsValidationError("The value '%s' is not validated by : \
-r\"%s\"" %(value, pattern))
+        raise ValidationError("The value '%s' is not validated by : \
+r\"%s\"" % (value, pattern))
     return value
 
-##@brief Validate a hostname (ipv4 or ipv6)
+# @brief Validate a hostname (ipv4 or ipv6)
+
+
 def host_val(value):
     if value == 'localhost':
         return value
@@ -225,37 +245,103 @@ def host_val(value):
     try:
         socket.inet_aton(value)
         return value
-    except (TypeError,OSError):
+    except (TypeError, OSError):
         pass
     try:
         socket.inet_pton(socket.AF_INET6, value)
         return value
-    except (TypeError,OSError):
+    except (TypeError, OSError):
         pass
     try:
         socket.getaddrinfo(value, 80)
         return value
-    except (TypeError,socket.gaierror):
+    except (TypeError, socket.gaierror):
         msg = "The value '%s' is not a valid host"
-        raise SettingsValidationError(msg % value)
+        raise ValidationError(msg % value)
+
+
+def custom_list_validator(value, validator_name, validator_kwargs=None):
+    validator_kwargs = dict() if validator_kwargs is None else validator_kwargs
+    validator = Validator(validator_name, **validator_kwargs)
+    for item in value.split():
+        validator(item)
+    return value.split()
 
-##@brief Validator for Editorial model component
+#
+#   Default validators registration
+#
+
+Validator.register_validator('custom_list', custom_list_validator,
+                             'A list validator that takes a "validator_name" as argument')
+
+Validator.register_validator('dummy', lambda value: value, 'Validate anything')
+
+Validator.register_validator('none', none_val, 'Validate None')
+
+Validator.register_validator('string', str_val, 'Validate string values')
+
+Validator.register_validator('strip', str.strip, 'String trim')
+
+Validator.register_validator('int', int_val, 'Integer value validator')
+
+Validator.register_validator('bool', boolean_val, 'Boolean value validator')
+
+Validator.register_validator('errfile', file_err_output,
+                             'Error output file validator (return stderr if filename is "-")')
+
+Validator.register_validator('directory', directory_val,
+                             'Directory path validator')
+
+Validator.register_validator('loglevel', loglevel_val, 'Loglevel validator')
+
+Validator.register_validator('path', path_val, 'path validator')
+
+Validator.register_validator('host', host_val, 'host validator')
+
+Validator.register_validator('regex', regex_val,
+                             'RegEx name validator (take re as argument)')
+
+Validator.create_list_validator('list', Validator('strip'), description="Simple list validator. Validate a list of values separated by ','",
+                                separator=',')
+
+Validator.create_list_validator(
+    'directory_list',
+    Validator('directory'),
+    description="Validator for a list of directory path separated with ','",
+    separator=',')
+
+Validator.create_write_list_validator(
+    'write_list',
+    Validator('directory'),
+    description="Validator for an array of values \
+        which will be set in a string, separated by ','",
+    separator=',')
+
+Validator.create_re_validator(
+    r'^https?://[^\./]+.[^\./]+/?.*$',
+    'http_url',
+    'Url validator')
+
+# @brief Validator for Editorial model component
 #
 # Designed to validate a conf that indicate a class.field in an EM
 #@todo modified the hardcoded dyncode import (it's a warning)
+
+
 def emfield_val(value):
-    LodelContext.expose_modules(globals(), {
-        'lodel.plugin.hooks': ['LodelHook']})
+    LodelContext.expose_modules(globals(),
+                                {'lodel.plugin.hooks': ['LodelHook']})
     spl = value.split('.')
     if len(spl) != 2:
         msg = "Expected a value in the form CLASSNAME.FIELDNAME but got : %s"
         raise SettingsValidationError(msg % value)
     value = tuple(spl)
-    #Late validation hook
+    # Late validation hook
+
     @LodelHook('lodel2_dyncode_bootstraped')
     def emfield_conf_check(hookname, caller, payload):
-        import leapi_dyncode as dyncode # <-- dirty & quick
-        classnames = { cls.__name__.lower():cls for cls in dyncode.dynclasses}
+        import leapi_dyncode as dyncode  # <-- dirty & quick
+        classnames = {cls.__name__.lower(): cls for cls in dyncode.dynclasses}
         if value[0].lower() not in classnames:
             msg = "Following dynamic class do not exists in current EM : %s"
             raise SettingsValidationError(msg % value[0])
@@ -265,13 +351,16 @@ def emfield_val(value):
             raise SettingsValidationError(msg % value)
     return value
 
-##@brief Validator for plugin name & optionnaly type
+# @brief Validator for plugin name & optionnaly type
 #
-#Able to check that the value is a plugin and if it is of a specific type
-def plugin_validator(value, ptype = None):
+# Able to check that the value is a plugin and if it is of a specific type
+
+
+def plugin_validator(value, ptype=None):
     LodelContext.expose_modules(globals(), {
         'lodel.plugin.hooks': ['LodelHook']})
     value = copy.copy(value)
+
     @LodelHook('lodel2_dyncode_bootstraped')
     def plugin_type_checker(hookname, caller, payload):
         LodelContext.expose_modules(globals(), {
@@ -284,133 +373,39 @@ def plugin_validator(value, ptype = None):
         except PluginError:
             msg = "No plugin named %s found"
             msg %= value
-            raise SettingsValidationError(msg)
+            raise ValidationError(msg)
         if plugin._type_conf_name.lower() != ptype.lower():
             msg = "A plugin of type '%s' was expected but found a plugin \
 named  '%s' that is a '%s' plugin"
             msg %= (ptype, value, plugin._type_conf_name)
-            raise SettingsValidationError(msg)
+            raise ValidationError(msg)
     return value
 
-def custom_list_validator(value, validator_name, validator_kwargs = None):
-    validator_kwargs = dict() if validator_kwargs is None else validator_kwargs
-    validator = SettingValidator(validator_name, **validator_kwargs)
-    for item in value.split():
-        validator(item)
-    return value.split()
-
-#
-#   Default validators registration
-#
 
-SettingValidator.register_validator(
+Validator.register_validator(
     'plugin',
     plugin_validator,
     'plugin name & type validator')
 
-SettingValidator.register_validator(
-    'custom_list',
-    custom_list_validator,
-    'A list validator that takes a "validator_name" as argument')
-
-SettingValidator.register_validator(
-    'dummy',
-    lambda value:value,
-    'Validate anything')
-
-SettingValidator.register_validator(
-    'none',
-    none_val,
-    'Validate None')
-
-SettingValidator.register_validator(
-    'string',
-    str_val,
-    'Validate string values')
-
-SettingValidator.register_validator(
-    'strip',
-    str.strip,
-    'String trim')
-
-SettingValidator.register_validator(
-    'int',
-    int_val,
-    'Integer value validator')
-
-SettingValidator.register_validator(
-    'bool',
-    boolean_val,
-    'Boolean value validator')
-
-SettingValidator.register_validator(
-    'errfile',
-    file_err_output,
-    'Error output file validator (return stderr if filename is "-")')
-
-SettingValidator.register_validator(
-    'directory',
-    directory_val,
-    'Directory path validator')
-
-SettingValidator.register_validator(
-    'loglevel',
-    loglevel_val,
-    'Loglevel validator')
-
-SettingValidator.register_validator(
-    'path',
-    path_val,
-    'path validator')
-
-SettingValidator.register_validator(
-    'host',
-    host_val,
-    'host validator')
-
-SettingValidator.register_validator(
+Validator.register_validator(
     'emfield',
     emfield_val,
     'EmField name validator')
 
-SettingValidator.register_validator(
-    'regex',
-    regex_val,
-    'RegEx name validator (take re as argument)')
-
-SettingValidator.create_list_validator(
-    'list',
-    SettingValidator('strip'),
-    description = "Simple list validator. Validate a list of values separated by ','",
-    separator = ',')
-
-SettingValidator.create_list_validator(
-    'directory_list',
-    SettingValidator('directory'),
-    description = "Validator for a list of directory path separated with ','",
-    separator = ',')
-SettingValidator.create_write_list_validator(
-    'write_list',
-    SettingValidator('directory'),
-    description = "Validator for an array of values which will be set in a string, separated by ','",
-    separator = ',')
-SettingValidator.create_re_validator(
-    r'^https?://[^\./]+.[^\./]+/?.*$',
-    'http_url',
-    'Url validator')
-
 #
 #   Lodel 2 configuration specification
 #
 
-##@brief Append a piece of confspec
+# @brief Append a piece of confspec
 #@note orig is modified during the process
 #@param orig dict : the confspec to update
 #@param section str : section name
 #@param key str
-#@param validator SettingValidator : the validator to use to check this configuration key's value
+#@param validator Validator : the validator to use to check this configuration key's value
 #@param default
 #@return new confspec
+
+
 def confspec_append(orig, section, key, validator, default):
     if section not in orig:
         orig[section] = dict()
@@ -418,41 +413,33 @@ def confspec_append(orig, section, key, validator, default):
         orig[section][key] = (default, validator)
     return orig
 
-##@brief Global specifications for lodel2 settings
+# @brief Global specifications for lodel2 settings
 LODEL2_CONF_SPECS = {
     'lodel2': {
-        'debug': (  True,
-                    SettingValidator('bool')),
-        'sitename': (   'noname',
-                        SettingValidator('strip')),
-        'runtest': (    False,
-                        SettingValidator('bool')),
+        'debug': (True, Validator('bool')),
+        'sitename': ('noname', Validator('strip')),
+        'runtest': (False, Validator('bool')),
     },
-    'lodel2.logging.*' : {
-        'level': (  'ERROR',
-                    SettingValidator('loglevel')),
-        'context': (    False,
-                        SettingValidator('bool')),
-        'filename': (   "-",
-                        SettingValidator('errfile', none_is_valid = False)),
-        'backupcount': (    5,
-                            SettingValidator('int', none_is_valid = False)),
-        'maxbytes': (   1024*10,
-                        SettingValidator('int', none_is_valid = False)),
+    'lodel2.logging.*': {
+        'level': ('ERROR', Validator('loglevel')),
+        'context': (False, Validator('bool')),
+        'filename': ("-", Validator('errfile', none_is_valid=False)),
+        'backupcount': (5, Validator('int', none_is_valid=False)),
+        'maxbytes': (1024 * 10, Validator('int', none_is_valid=False)),
     },
     'lodel2.editorialmodel': {
-        'emfile': ( 'em.pickle', SettingValidator('strip')),
-        'emtranslator': ( 'picklefile', SettingValidator('strip')),
-        'dyncode': ( 'leapi_dyncode.py', SettingValidator('strip')),
-        'groups': ( '', SettingValidator('list')),
-        'editormode': ( False, SettingValidator('bool')),
+        'emfile': ('em.pickle', Validator('strip')),
+        'emtranslator': ('picklefile', Validator('strip')),
+        'dyncode': ('leapi_dyncode.py', Validator('strip')),
+        'groups': ('', Validator('list')),
+        'editormode': (False, Validator('bool')),
     },
     'lodel2.datasources.*': {
-        'read_only': (False, SettingValidator('bool')),
-        'identifier': ( None, SettingValidator('string')),
+        'read_only': (False, Validator('bool')),
+        'identifier': (None, Validator('string')),
     },
     'lodel2.auth': {
-        'login_classfield': ('user.login', SettingValidator('emfield')),
-        'pass_classfield': ('user.password', SettingValidator('emfield')),
+        'login_classfield': ('user.login', Validator('emfield')),
+        'pass_classfield': ('user.password', Validator('emfield')),
     },
 }

nocontext_tests.py

@@ -1,12 +1,12 @@
 #-*- coding: utf-8 -*-
 
-##@brief Loader for tests which do not need an lodel installation
+# @brief Loader for tests which do not need an lodel installation
 #
 # Options
 ################
-# 
+#
 # @note We can pass the path to a directory to write results file, nocontext_tests.log
-# It has to be at first, otherwise it will not be taken 
+# It has to be at first, otherwise it will not be taken
 # and the default one, current directory, will be used.
 # The results are not displayed, only stored in nocontext_tests.log
 #
@@ -19,20 +19,22 @@
 #
 #
 
-import sys, os, os.path
+import sys
+import os
+import os.path
 import unittest
 
 
 loader = unittest.TestLoader()
 
 if ((len(sys.argv) > 1) and (sys.argv[1].startswith('-')) is False):
-	dpath = sys.argv[1]
+    dpath = sys.argv[1]
 else:
-	dpath = '.'
+    dpath = '.'
 
 suite = loader.discover('tests', pattern='nc_test*.py')
-with open(dpath+'/nocontext_tests.log', 'w') as logfile:
+with open(dpath + '/nocontext_tests.log', 'w') as logfile:
     unittest.TextTestRunner(
-    	logfile,
-        failfast = '-f' in sys.argv,
-        verbosity = 2 if '-v' in sys.argv else 1).run(suite)
+        logfile,
+        failfast='-f' in sys.argv,
+        verbosity=2 if '-v' in sys.argv else 1).run(suite)

scripts/settings_validator.py

@@ -2,5 +2,5 @@
 import sys
 import os, os.path
 sys.path.append(os.path.dirname(os.getcwd()+'/..'))
-from lodel.settings.validator import SettingValidator
-print(SettingValidator.validators_list_str())
+from lodel.validator.validator import Validator
+print(Validator.validators_list_str())

tests/settings/test_validator.py

@@ -5,52 +5,52 @@ from unittest import mock
 from unittest.mock import patch
 
 from lodel.exceptions import *
-from lodel.settings.validator import *
+from lodel.validator.validator import *
 
-class SettingValidatorTestCase(unittest.TestCase):
+class ValidatorTestCase(unittest.TestCase):
     
     def test_init_basic(self):
         """ Testing the SettingsValidator class instanciation"""
-        valid = SettingValidator('string')
+        valid = Validator('string')
         #trying to call it
         valid('test')
 
     def test_init_badname(self):
-        """ Testing SettingValidator instanciation with non existing validator
+        """ Testing Validator instanciation with non existing validator
             name"""
         with self.assertRaises(LodelFatalError):
-            SettingValidator('qklfhsdufgsdyfugigsdfsdlcknsdp')
+            Validator('qklfhsdufgsdyfugigsdfsdlcknsdp')
 
     def test_noneswitch(self):
         """ Testing the none_is_valid switch given at validator instanciation
         """
-        none_invalid = SettingValidator('int')
-        none_valid = SettingValidator('int', none_is_valid = True)
+        none_invalid = Validator('int')
+        none_valid = Validator('int', none_is_valid = True)
 
         none_valid(None)
-        with self.assertRaises(SettingsValidationError):
+        with self.assertRaises(ValidationError):
             none_invalid(None)
 
     def test_validator_registration(self):
-        """ Testing the register_validator method of SettingValidator """
+        """ Testing the register_validator method of Validator """
         mockfun = mock.MagicMock()
         vname = 'lfkjdshfkuhsdygsuuyfsduyf'
         testval = 'foo'
-        SettingValidator.register_validator(vname, mockfun, 'test validator')
+        Validator.register_validator(vname, mockfun, 'test validator')
         #Using registered validator
-        valid = SettingValidator(vname)
+        valid = Validator(vname)
         valid(testval)
         mockfun.assert_called_once_with(testval)
 
     def test_validator_optargs_forwarding(self):
-        """ Testing the ability for SettingValidator to forward optional
+        """ Testing the ability for Validator to forward optional
             arguments """
         mockfun = mock.MagicMock()
         vname = 'lkjdsfhsdiufhisduguig'
         testval = 'azertyuiop'
-        SettingValidator.register_validator(vname, mockfun, 'test validator')
+        Validator.register_validator(vname, mockfun, 'test validator')
         #Using registered validator with more arguments
-        valid = SettingValidator(vname,
+        valid = Validator(vname,
             arga = 'a', argb = 42, argc = '1337')
         valid(testval)
         mockfun.assert_called_once_with(