First step of migration to zodb property sheets

* ERP5Type.PropertySheet becomes a dynamic module that returns strings
  instead of classes for compatibility:
  - the document classes can now use strings in property_sheets attribute
  - if a document uses a string instead of a class reference to point to a
    property sheet, it means that the property sheet can either be an old
    (filesytem, local, in a product) property sheet, or a zodb propertysheet

  For now, the contents of ERP5Type.PropertySheet (strings) are overwritten
  if a local PropertySheet is loaded from the disk. But with time, as
  property sheets will migrate to ZODB, the module will empty itself and
  contain only strings.

* Move all property sheets from all products to ERP5PropertySheetLegacy
  product. Only property sheets that were left 'as is' are CMF* property
  sheets.

This commit is mostly a move to another Product, and should have small
consequences on tests/existing instances.

However, if you used to import PropertySheets in custom/project code
in your custom Property Sheets, you will need to rename:
   from Products.*.PropertySheet.Foo import Foo
to:
   from Products.ERP5PropertySheetLegacy.Foo import Foo



git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@41639 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/PropertySheet/Assignment.py → product/ERP5PropertySheetLegacy/PropertySheet/Assignment.py

@@ -27,7 +27,7 @@
 #
 ##############################################################################
 
-from Products.ERP5.PropertySheet.Path import Path
+from Path import Path
 
 
 class Assignment(Path):

product/ERP5/PropertySheet/PackingList.py → product/ERP5PropertySheetLegacy/PropertySheet/PackingList.py

@@ -25,7 +25,7 @@
 #
 ##############################################################################
 
-from Products.ERP5.PropertySheet.Order import Order
+from Order import Order
 
 
 class PackingList(Order):

product/ERP5/PropertySheet/RoundingModel.py → product/ERP5PropertySheetLegacy/PropertySheet/RoundingModel.py

@@ -27,7 +27,7 @@
 #
 ##############################################################################
 
-from Products.ERP5.PropertySheet.DecimalOption import DecimalOption
+from DecimalOption import DecimalOption
 
 
 class RoundingModel(DecimalOption):

product/ERP5Type/PropertySheet/__init__.py

-from Base import Base
-from CacheFactory import CacheFactory
-from DublinCore import DublinCore
-from Folder import Folder
-from SimpleItem import SimpleItem
-from XMLObject import XMLObject
-from DocumentationHelper import DocumentationHelper
-from BaseType import BaseType
-from ActionInformation import ActionInformation
-from RoleInformation import RoleInformation
-from SortIndex import SortIndex
-from BaseCache import BaseCache
-from DistributedRamCache import DistributedRamCache
-from Url import Url
-from MemcachedPlugin import MemcachedPlugin
-from StandardProperty import StandardProperty
-from TranslatableProperty import TranslatableProperty
-from AcquiredProperty import AcquiredProperty
-from DynamicCategoryProperty import DynamicCategoryProperty
-from CategoryExistenceConstraint import CategoryExistenceConstraint
-from PropertyExistenceConstraint import PropertyExistenceConstraint
-from AttributeEqualityConstraint import AttributeEqualityConstraint
-from ContentExistenceConstraint import ContentExistenceConstraint
-from CategoryMembershipArityConstraint import CategoryMembershipArityConstraint
-from CategoryRelatedMembershipArityConstraint import \
-     CategoryRelatedMembershipArityConstraint
-from TALESConstraint import TALESConstraint
-from PropertyTypeValidityConstraint import PropertyTypeValidityConstraint

product/ERP5Type/__init__.py

@@ -40,6 +40,20 @@ document_class_registry = {}
 # similarly for mixins
 mixin_class_registry = {}
 
+# For early phases of bootstrap (and future ZODB property sheets)
+# ERP5Type.PropertySheet becomes a dynamic module that always
+# returns a string. ERP5Type.PropertySheet.doesnotexist for example
+# is 'doesnotexist'
+# Later on, if a local property sheet is imported from a product,
+# importLocalPropertySheet will load it as ERP5Type.PropertySheet.*
+# This is mostly a backwards compatible mechanism, to ensure that
+# old class definitions will still work with properties such as
+#    property_sheets = (ERP5Type.PropertySheet.YYY, ... )
+# after transforming 'YYY' into a ZODB property sheet
+from dynamic.dynamic_module import registerDynamicModule
+PropertySheet = registerDynamicModule('Products.ERP5Type.PropertySheet',
+                                      lambda name: name)
+
 # Switch(es) for ongoing development which require single code base
 
 # Update ERP5 Globals
@@ -54,7 +68,7 @@ document_classes = updateGlobals( this_module,
                                   permissions_module=Permissions,
                                   is_erp5_type=1 )
 
-import PropertySheet, ZopePatch
+import ZopePatch
 import interfaces
 
 import Products.Localizer # So that we make sure Globals.get_request is available