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##############################################################################
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#
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# Copyright (c) 2002 Zope Foundation and Contributors.
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# All Rights Reserved.
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#
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# This software is subject to the provisions of the Zope Public License,
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# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
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# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
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# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
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# FOR A PARTICULAR PURPOSE.
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#
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##############################################################################
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"""Interface-specific exceptions
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"""
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from __future__ import absolute_import
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class Invalid(Exception):
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"""A specification is violated
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"""
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class DoesNotImplement(Invalid):
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""" This object does not implement """
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def __init__(self, interface):
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self.interface = interface
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def __str__(self):
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return """An object does not implement interface %(interface)s
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""" % self.__dict__
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class BrokenImplementation(Invalid):
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"""An attribute is not completely implemented.
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"""
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def __init__(self, interface, name):
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self.interface=interface
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self.name=name
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def __str__(self):
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return """An object has failed to implement interface %(interface)s
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The %(name)s attribute was not provided.
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""" % self.__dict__
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class BrokenMethodImplementation(Invalid):
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"""An method is not completely implemented.
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"""
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def __init__(self, method, mess):
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self.method=method
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self.mess=mess
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def __str__(self):
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return """The implementation of %(method)s violates its contract
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because %(mess)s.
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""" % self.__dict__
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class InvalidInterface(Exception):
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"""The interface has invalid contents
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"""
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class BadImplements(TypeError):
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"""An implementation assertion is invalid
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because it doesn't contain an interface or a sequence of valid
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implementation assertions.
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"""
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