dc0993ecc5
git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@1226 fd906abe-77d9-0310-91a1-e0d9ade77398
46 lines
1.3 KiB
Python
46 lines
1.3 KiB
Python
#
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# Copyright (c) 2006 Helmut Merz helmutm@cy55.de
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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"""
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Represent positions that require certain knowledge.
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$Id$
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"""
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from zope.interface import implements
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from cybertools.knowledge.interfaces import IPosition
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class Position(object):
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implements(IPosition)
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def __init__(self):
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self._requirements = {}
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def getRequirements(self):
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return self._requirements
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def requires(self, obj):
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self._requirements[obj] = True
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obj._requiringPositions.add(self)
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def removeRequirement(self, obj):
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del self._requirements[obj]
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del obj._requiringPositions[self]
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