21 class DummyCursorError(Exception): pass

    21 def use_interfaces(obj):

    22 class RaiseCursor:

    22     from cubicweb.selectors import implements

    23     @classmethod

    23     try:

    24     def execute(cls, rql, args=None, eid_key=None):

    24         # XXX deprecated

    25         raise DummyCursorError()

    25         return sorted(obj.accepts_interfaces) 

    26     except AttributeError:

    27         try:

    28             impl = obj.__select__.search_selector(implements)

    29             if impl:

    30                 return sorted(impl.expected_ifaces)

    31         except AttributeError:

    32             pass # old-style vobject classes with no accepts_interfaces

    33         return ()

    34 

    35 def expand_parent_classes(iface):

    36     res = [iface]

    37     for parent in iface.__bases__:

    38         res += expand_parent_classes(parent)

    39     return res