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##############################################################################
#
# Copyright (c) 2002 Zope Foundation 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.
#
##############################################################################
"""Interface-specific exceptions
"""
class Invalid(Exception):
"""A specification is violated
"""
class DoesNotImplement(Invalid):
""" This object does not implement """
def __init__(self, interface):
self.interface = interface
def __str__(self):
return """An object does not implement interface %(interface)s
""" % self.__dict__
class BrokenImplementation(Invalid):
"""An attribute is not completely implemented.
"""
def __init__(self, interface, name):
self.interface=interface
self.name=name
def __str__(self):
return """An object has failed to implement interface %(interface)s
The %(name)s attribute was not provided.
""" % self.__dict__
class BrokenMethodImplementation(Invalid):
"""An method is not completely implemented.
"""
def __init__(self, method, mess):
self.method=method
self.mess=mess
def __str__(self):
return """The implementation of %(method)s violates its contract
because %(mess)s.
""" % self.__dict__
class InvalidInterface(Exception):
"""The interface has invalid contents
"""
class BadImplements(TypeError):
"""An implementation assertion is invalid
because it doesn't contain an interface or a sequence of valid
implementation assertions.
"""