##############################################################################
#
# Copyright (c) 2002-2009 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.
#
##############################################################################
"""Interfaces for cache.
"""
__docformat__ = 'restructuredtext'

from zope.interface import Interface


class ICache(Interface):
    """Interface for caches."""

    def invalidate(ob, key=None):
        """Invalidates cached entries that apply to the given object.

        `ob` is an object location.  If `key` is specified, only
        invalidates entry for the given key.  Otherwise invalidates
        all entries for the object.
        """

    def invalidateAll():
        """Invalidates all cached entries."""

    def query(ob, key=None, default=None):
        """Returns the cached data previously stored by `set()`.

        `ob` is the location of the content object being cached.  `key` is
        a mapping of keywords and values which should all be used to
        select a cache entry.
        """

    def set(data, ob, key=None):
        """Stores the result of executing an operation."""