e5fefb456d
git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@659 fd906abe-77d9-0310-91a1-e0d9ade77398
77 lines
2.2 KiB
Python
77 lines
2.2 KiB
Python
#
|
|
# Copyright (c) 2005 Helmut Merz helmutm@cy55.de
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation; either version 2 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program; if not, write to the Free Software
|
|
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
#
|
|
|
|
"""
|
|
interface definitions for the Relations utility and relation objects.
|
|
|
|
$Id$
|
|
"""
|
|
|
|
from zope.interface import Interface, Attribute
|
|
|
|
|
|
class IRelationsRegistryUpdate(Interface):
|
|
""" Interface for registering and unregistering relations with a
|
|
relations registry.
|
|
"""
|
|
|
|
def register(relation):
|
|
""" Register the relation given with this registry.
|
|
"""
|
|
|
|
def unregister(relation):
|
|
""" Remove the relation given from this registry.
|
|
"""
|
|
|
|
|
|
class IRelationsRegistryQuery(Interface):
|
|
""" Interface for querying a relations registry.
|
|
"""
|
|
|
|
def query(**kw):
|
|
""" Return a sequence of relations that fulfill the criteria given.
|
|
|
|
Example: rr.queryRelations(first=someObject, second=anotherObject,
|
|
relationship=SomeRelationClass)
|
|
"""
|
|
|
|
|
|
class IRelationsRegistry(IRelationsRegistryUpdate, IRelationsRegistryQuery):
|
|
""" Local utility for registering (cataloguing) and searching relations.
|
|
"""
|
|
|
|
|
|
class IRelation(Interface):
|
|
""" Base interface for relations.
|
|
"""
|
|
|
|
|
|
class IDyadicRelation(IRelation):
|
|
""" Relation connecting two objects.
|
|
"""
|
|
|
|
first = Attribute('First object that belongs to the relation.')
|
|
second = Attribute('Second object that belongs to the relation.')
|
|
|
|
|
|
class ITriadicRelation(IDyadicRelation):
|
|
""" Relation connecting three objects.
|
|
"""
|
|
|
|
third = Attribute('Third object that belongs to the relation.')
|
|
|