def assertLocation(adapter, parent):
"""Assert locatable adapters.
This function asserts that the adapter get location-proxied unless it does
not provide ILocation itself. Further more the returned locatable adapter
get its parent set unless its __parent__ attribute is not None.
see adapter.txt
"""
# handle none-locatable adapters (A)
if not ILocation.providedBy(adapter):
locatable = LocationProxy(adapter)
locatable.__parent__ = parent
return locatable
# handle locatable, parentless adapters (B)
if adapter.__parent__ is None:
adapter.__parent__ = parent
return adapter
# handle locatable, parentful adapters (C)
else:
return adapter
def _customizeUnprotected(self, adapter, context):
if (ILocation.providedBy(adapter)
and adapter.__parent__ is None):
adapter.__parent__ = context
return adapter
