Written a first DummyMigrationHandler and modified Model __init__ method to have a migration_handler arguments

Now Model as an attribute named migration_handler
DummyMigrationHandler has only one method : register_change

EditorialModel/migrationhandler/dummy.py

@@ -0,0 +1,14 @@
+# -*- coding: utf-8 -*-
+
+## Manage Model changes
+class DummyMigrationHandler(object):
+    
+    ## @brief Record a change in the EditorialModel and indicate wether or not it is possible to make it
+    # @note The states ( initial_state and new_state ) contains only fields that changes
+    # @param uid int : The uid of the change EmComponent
+    # @param initial_state dict : dict with field name as key and field value as value representing the original state
+    # @param new_state dict : dict with field name as key and field value as value representing the new state
+    # @return True if the modification is allowed False if not.
+    def register_change(self, uid, initial_state, new_state):
+        return True
+        

EditorialModel/model.py

@@ -3,6 +3,7 @@
 ## @file editorialmodel.py
 # Manage instance of an editorial model
 
+from EditorialModel.migrationhandler.dummy import DummyMigrationHandler
 from EditorialModel.classes import EmClass
 from EditorialModel.fieldgroups import EmFieldGroup
 from EditorialModel.fields import EmField
@@ -18,7 +19,8 @@ class Model(object):
     ## Constructor
     #
     # @param backend unknown: A backend object instanciated from one of the classes in the backend module
-    def __init__(self, backend):
+    def __init__(self, backend, migration_handler = None):
+        self.migration_handler = DummyMigrationHandler() if migration_handler is None else migration_handler
         self.backend = backend
         self._components = {'uids': {}, 'EmClass': [], 'EmType': [], 'EmField': [], 'EmFieldGroup': []}
         self.load()