ZODB Components: providesIFoo() getters were only created for FS Interfaces (MR !1099).

Add them to BaseAccessorHolder (like `Base Category` accessors) instead of
Base class so they can be regenerated on reset while not having to remove
ZODB Components from Base class on reset.

This means that providesIFoo() will only be available on Portal Type classes
whereas before it was working for direct Document instanciation, but the latter
has been banned for several years anyway and the few remaining ones have been
fixed (23b2b5fd, e791d08a).

Also, instead of Base.provides() being a CachingMethod() (does not work with
resets), create a method dynamically on the Portal Type class (erp5.portal_type.Foo),
as not caching at all is ~18 times slower.

product/ERP5Type/Base.py

@@ -800,17 +800,34 @@ class Base(
     self.reindexObject()
 
   security.declarePublic('provides')
+  @classmethod
   def provides(cls, interface_name):
     """
-    Check if the current class provides a particular interface from ERP5Type's
-    interfaces registry
+    Check if the current class provides a particular interface from Interface
+    Components and fallback on ERP5Type's interfaces registry
     """
-    interface = getattr(interfaces, interface_name, None)
-    if interface is not None:
-      return interface.implementedBy(cls)
-    return False
-  provides = classmethod(CachingMethod(provides, 'Base.provides',
-                                       cache_factory='erp5_ui_long'))
+    from Products.ERP5Type.dynamic.portal_type_class import _importComponentClass
+    import erp5.component.interface
+    interface = _importComponentClass(erp5.component.interface, interface_name)
+    if interface is None:
+      try:
+        interface = getattr(interfaces, interface_name)
+      except AttributeError:
+        # provides() is public (DoS)
+        return False
+
+    return_value = interface.implementedBy(cls)
+    # XXX: All classes should already be 'erp5.portal_type'...
+    if cls.__module__ == 'erp5.portal_type':
+      # provides() is usually called through providesI<interface_name>() and
+      # not directly, so optimize this common use case
+      #
+      # XXX:
+      # - Optimize provides() too?
+      # - Create PortalTypeClassCachingMethod() if caching to erp5.portal_type.XXX
+      #   is useful elsewhere?
+      setattr(cls, 'provides' + interface_name, lambda _: return_value)
+    return return_value
 
   def _aq_key(self):
     return (self.portal_type, self.__class__)

product/ERP5Type/Utils.py

@@ -721,15 +721,15 @@ def registerBaseCategories(property_sheet):
     base_category_dict[bc] = 1
 
 def importLocalInterface(module_id, path = None, is_erp5_type=False):
-  def provides(class_id):
-    # Create interface getter
-    accessor_name = 'provides' + class_id
-    setattr(BaseClass, accessor_name, lambda self: self.provides(class_id))
-    BaseClass.security.declarePublic(accessor_name)
+  """
+  Import filesystem Interface and add it to Products.ERP5Type.interfaces,
+  only meaningful for filesystem Interface as they can all be loaded at
+  ERP5 startup.
+
+  Corresponding providesI<class_id> accessor is added to BaseAccessorHolder.
+  """
   class_id = "I" + convertToUpperCase(module_id)
-  if is_erp5_type:
-    provides(class_id)
-  else:
+  if not is_erp5_type:
     if path is None:
       instance_home = getConfiguration().instancehome
       path = os.path.join(instance_home, "interfaces")
@@ -742,7 +742,6 @@ def importLocalInterface(module_id, path = None, is_erp5_type=False):
     for k, v in module.__dict__.iteritems():
       if type(v) is InterfaceClass and v is not Interface:
         setattr(interfaces, k, v)
-        provides(class_id)
 
 def importLocalConstraint(class_id, path = None):
   import Products.ERP5Type.Constraint

product/ERP5Type/dynamic/accessor_holder.py

@@ -151,6 +151,14 @@ def _generateBaseAccessorHolder(portal):
                                         base_category_id,
                                         category_tool)
 
+  # Create providesIFoo() getters of ZODB/FS Interface classes
+  def provides(class_id):
+    accessor_name = 'provides' + class_id
+    setattr(accessor_holder, accessor_name, lambda self: self.provides(class_id))
+    accessor_holder.security.declarePublic(accessor_name)
+  for class_id in portal.portal_types.getInterfaceTypeList():
+    provides(class_id)
+
   erp5.accessor_holder.registerAccessorHolder(accessor_holder)
   return accessor_holder
 

product/ERP5Type/tests/testDynamicClassGeneration.py

@@ -3036,6 +3036,7 @@ class %s(Interface):
     methods from Person Document
     """
     import erp5.portal_type
+    import erp5.accessor_holder
     person_type = self.portal.portal_types.Person
     person_type_class = erp5.portal_type.Person
 
@@ -3043,6 +3044,8 @@ class %s(Interface):
     self.tic()
     self.failIfModuleImportable('ITestPortalType')
     self.assertFalse('ITestPortalType' in person_type.getInterfaceTypeList())
+    self.failIfHasAttribute(erp5.accessor_holder.BaseAccessorHolder,
+                            'providesITestPortalType')
 
     component.validate()
     self.assertModuleImportable('ITestPortalType')
@@ -3053,6 +3056,16 @@ class %s(Interface):
     person_type_class.loadClass()
     implemented_by_list = list(implementedBy(person_type_class))
     self.assertFalse(ITestPortalType in implemented_by_list)
+    self.assertHasAttribute(erp5.accessor_holder.BaseAccessorHolder,
+                            'providesITestPortalType')
+    self.assertHasAttribute(person_type_class, 'providesITestPortalType')
+    new_person = self.portal.person_module.newContent(portal_type='Person')
+    self.assertFalse('providesITestPortalType' in person_type_class.__dict__)
+    self.assertFalse(new_person.providesITestPortalType())
+    self.assertTrue('providesITestPortalType' in person_type_class.__dict__)
+    # Called again to check the alias created on erp5.portal_type.Person on
+    # the first call of providesITestPortalType() (optimization)
+    self.assertFalse(new_person.providesITestPortalType())
     person_original_interface_type_list = list(person_type.getTypeInterfaceList())
     try:
       person_type.setTypeInterfaceList(person_original_interface_type_list +
@@ -3064,9 +3077,15 @@ class %s(Interface):
       implemented_by_list = list(implementedBy(person_type_class))
       self.assertTrue(ITestPortalType in implemented_by_list)
 
+      self.assertFalse('providesITestPortalType' in person_type_class.__dict__)
+      self.assertTrue(new_person.providesITestPortalType())
+      self.assertTrue('providesITestPortalType' in person_type_class.__dict__)
+      self.assertTrue(new_person.providesITestPortalType())
+
     finally:
       person_type.setTypeInterfaceList(person_original_interface_type_list)
       self.commit()
+      self.assertFalse(new_person.providesITestPortalType())
 
 from Products.ERP5Type.Core.MixinComponent import MixinComponent
 class TestZodbMixinComponent(TestZodbInterfaceComponent):