1f72392904
git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@3111 fd906abe-77d9-0310-91a1-e0d9ade77398
130 lines
3.6 KiB
Python
130 lines
3.6 KiB
Python
#
|
|
# Copyright (c) 2009 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
|
|
#
|
|
|
|
"""
|
|
Common functionality.
|
|
|
|
$Id$
|
|
"""
|
|
|
|
from zope.app.intid.interfaces import IIntIds
|
|
from zope import component
|
|
|
|
|
|
class ContainerAttribute(object):
|
|
|
|
def __init__(self, factory, idAttr='name'):
|
|
self.factory = factory
|
|
self.idAttr = idAttr
|
|
self.data = {}
|
|
|
|
def create(self, id, **kw):
|
|
if self.idAttr not in kw:
|
|
kw[self.idAttr] = id
|
|
obj = self.factory(id)
|
|
for k, v in kw.items():
|
|
setattr(obj, k, v)
|
|
self.data[id] = obj
|
|
component.getUtility(IIntIds).register(obj)
|
|
return obj
|
|
|
|
def remove(self, id):
|
|
component.getUtility(IIntIds).unregister(self.data[id])
|
|
del self.data[id]
|
|
|
|
def get(self, id, default=None):
|
|
return self.data.get(id, default)
|
|
|
|
def __iter__(self):
|
|
return iter(self.data.values())
|
|
|
|
|
|
class RelationSet(object):
|
|
|
|
def __init__(self, parent, attributeName=None):
|
|
self.parent = parent
|
|
self.attributeName = attributeName
|
|
self.data = {}
|
|
|
|
def add(self, related):
|
|
self.data[related.name] = related
|
|
if self.attributeName:
|
|
value = getattr(related, self.attributeName)
|
|
if isinstance(value, RelationSet):
|
|
relatedData = value.data
|
|
relatedData[self.parent.name] = self.parent
|
|
else:
|
|
setattr(related, self.attributeName, self.parent)
|
|
|
|
def remove(self, related):
|
|
name = related.name
|
|
del self.data[name]
|
|
if self.attributeName:
|
|
value = getattr(related, self.attributeName)
|
|
if isinstance(value, RelationSet):
|
|
relatedData = value.data
|
|
del relatedData[self.parent.name]
|
|
else:
|
|
setattr(related, self.attributeName, None)
|
|
|
|
def __iter__(self):
|
|
for obj in self.data.values():
|
|
yield obj
|
|
|
|
|
|
class Relation(object):
|
|
|
|
def __init__(self, name, otherName):
|
|
self.name = name
|
|
self.otherName = otherName
|
|
|
|
def __get__(self, inst, class_=None):
|
|
if inst is None:
|
|
return self
|
|
return getattr(inst, self.name)
|
|
|
|
def __set__(self, inst, value):
|
|
existing = getattr(inst, self.name, None)
|
|
if existing is not None:
|
|
other = getattr(existing, self.otherName).data
|
|
for k, v in other.items():
|
|
if v != inst:
|
|
del other[k]
|
|
if value is not None:
|
|
other = getattr(value, self.otherName).data
|
|
other[inst.name] = inst
|
|
setattr(inst, self.name, value)
|
|
|
|
|
|
class BaseObject(object):
|
|
|
|
collection = RelationSet
|
|
|
|
|
|
# utility functions
|
|
|
|
def getUidForObject(obj, intIds=None):
|
|
if intIds is None:
|
|
intIds = component.getUtility(IIntIds)
|
|
return intIds.getId(obj)
|
|
|
|
def getObjectForUid(uid, intIds=None):
|
|
if intIds is None:
|
|
intIds = component.getUtility(IIntIds)
|
|
return intIds.getObject(uid)
|
|
|