[Zope-Checkins] CVS: Zope3/lib/python/Zope/ContextWrapper - ContainmentIterator.py:1.1.2.1

[Jim Fulton]

Update of /cvs-repository/Zope3/lib/python/Zope/ContextWrapper
In directory cvs.zope.org:/tmp/cvs-serv24687

Added Files:
      Tag: Zope-3x-branch
	ContainmentIterator.py 
Log Message:
Added containment iterators for wrapped objects.


=== Added File Zope3/lib/python/Zope/ContextWrapper/ContainmentIterator.py ===
##############################################################################
#
# Copyright (c) 2001 Zope Corporation and Contributors. All Rights Reserved.
# 
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (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
# 
##############################################################################
"""

Revision information: $Id: ContainmentIterator.py,v 1.1.2.1 2001/12/28 18:58:40 jim Exp $
"""

from Zope.ContextWrapper import Wrapper, getinnercontext

class ContainmentIterator:

    def __init__(self, obj):
        self._ob = Wrapper(None, obj)

    def __iter__(self):
        return self
    
    def next(self):
        ob = self._ob
        if type(ob) is not Wrapper:
            raise StopIteration

        ob = getinnercontext(ob)
        self._ob = ob
        return ob