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vocabulary.py
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vocabulary.py
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##############################################################################
#
# Copyright (c) 2003 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Vocabulary that provides a list of all interfaces its context provides.
$Id$
"""
__docformat__ = 'restructuredtext'
from zope.interface import classProvides, providedBy
from zope.security.proxy import removeSecurityProxy
from zope.schema.vocabulary import SimpleVocabulary, SimpleTerm
from zope.schema.interfaces import IVocabularyFactory
from zope.component.interface import interfaceToName
class ObjectInterfacesVocabulary(SimpleVocabulary):
"""A vocabulary that provides a list of all interfaces that its context
provides.
Here a quick demonstration:
>>> from zope.interface import Interface, implements
>>> class I1(Interface):
... pass
>>> class I2(Interface):
... pass
>>> class I3(I2):
... pass
>>> class Object(object):
... implements(I3, I1)
>>> vocab = ObjectInterfacesVocabulary(Object())
>>> import pprint
>>> names = [term.token for term in vocab]
>>> names.sort()
>>> pprint.pprint(names)
['zope.app.interface.vocabulary.I1',
'zope.app.interface.vocabulary.I2',
'zope.app.interface.vocabulary.I3',
'zope.interface.Interface']
"""
classProvides(IVocabularyFactory)
def __init__(self, context):
# Remove the security proxy so the values from the vocabulary
# are the actual interfaces and not proxies.
component = removeSecurityProxy(context)
interfaces = providedBy(component).flattened()
terms = [SimpleTerm(interface, interfaceToName(context, interface))
for interface in interfaces]
super(ObjectInterfacesVocabulary, self).__init__(terms)