8477eb47b9
git-svn-id: svn://svn.cy55.de/Zope3/src/loops/trunk@1091 fd906abe-77d9-0310-91a1-e0d9ade77398
263 lines
8.4 KiB
Python
263 lines
8.4 KiB
Python
#
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# Copyright (c) 2005 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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Definition of the Concept and related classes.
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$Id$
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"""
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from zope.app import zapi
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from zope.app.container.btree import BTreeContainer
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from zope.app.container.contained import Contained
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from zope.cachedescriptors.property import Lazy
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from zope.component import adapts
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from zope.interface import implements
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from zope import schema
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from zope.security.proxy import removeSecurityProxy
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from persistent import Persistent
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from cybertools.relation import DyadicRelation
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from cybertools.relation.registry import getRelations
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from cybertools.relation.registry import getRelationSingle, setRelationSingle
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from cybertools.relation.interfaces import IRelationRegistry, IRelatable
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from interfaces import IConcept, IConceptRelation, IConceptView
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from interfaces import IConceptManager, IConceptManagerContained
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from interfaces import ILoopsContained
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from interfaces import ISearchableText
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# relation classes
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class ConceptRelation(DyadicRelation):
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""" A relation between concept objects.
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"""
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implements(IConceptRelation)
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def __init__(self, first, second, predicate=None):
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super(ConceptRelation, self).__init__(first, second)
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if predicate is None:
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context = first is not None and first or second
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cm = context.getLoopsRoot().getConceptManager()
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predicate = cm.getDefaultPredicate()
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self.predicate = predicate
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def getPredicateName(self):
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baseName = super(ConceptRelation, self).getPredicateName()
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id = zapi.getUtility(IRelationRegistry).getUniqueIdForObject(self.predicate)
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return '.'.join((baseName, str(id)))
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class ResourceRelation(DyadicRelation):
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""" A relation between a concept and a resource object.
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"""
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implements(IConceptRelation)
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# concept
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class Concept(Contained, Persistent):
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implements(IConcept, IConceptManagerContained, IRelatable)
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proxyInterface = IConceptView
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_title = u''
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def getTitle(self): return self._title
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def setTitle(self, title): self._title = title
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title = property(getTitle, setTitle)
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def getConceptType(self):
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cm = self.getLoopsRoot().getConceptManager()
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typeRelation = ConceptRelation(None, self, cm.getTypePredicate())
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rel = getRelationSingle(self, typeRelation, forSecond=True)
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return rel and rel.first or None
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def setConceptType(self, concept):
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if self.getConceptType() != concept:
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cm = self.getLoopsRoot().getConceptManager()
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typeRelation = ConceptRelation(removeSecurityProxy(concept), self,
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cm.getTypePredicate())
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setRelationSingle(typeRelation, forSecond=True)
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conceptType = property(getConceptType, setConceptType)
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def __init__(self, title=u''):
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self.title = title
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def getLoopsRoot(self):
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return zapi.getParent(self).getLoopsRoot()
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# concept relations
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def getChildren(self, relationships=None):
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if relationships is None:
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relationships = [ConceptRelation(self, None)]
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rels = getRelations(first=self, relationships=relationships)
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return [r.second for r in rels]
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# TODO: sort...
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def getParents(self, relationships=None):
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if relationships is None:
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relationships = [ConceptRelation(None, self)]
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rels = getRelations(second=self, relationships=relationships)
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return [r.first for r in rels]
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def assignChild(self, concept, relationship=ConceptRelation):
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registry = zapi.getUtility(IRelationRegistry)
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rel = relationship(self, concept)
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registry.register(rel)
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# TODO (?): avoid duplicates
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def assignParent(self, concept, relationship=ConceptRelation):
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concept.assignChild(self, relationship)
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def deassignChildren(self, concept, relationships=None):
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if relationships is None:
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relationships = [ConceptRelation(self, None)]
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registry = zapi.getUtility(IRelationRegistry)
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relations = []
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for rs in relationships:
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relations.extend(registry.query(first=self, second=concept,
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relationship=rs))
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for rel in relations:
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registry.unregister(rel)
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def deassignParents(self, concept, relationships=None):
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concept.deassignChildren(self, relationships)
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# resource relations
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def getResources(self, relationships=None):
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if relationships is None:
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relationships = [ResourceRelation]
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rels = getRelations(first=self, relationships=relationships)
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return [r.second for r in rels]
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# TODO: sort...
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def assignResource(self, resource, relationship=ResourceRelation):
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registry = zapi.getUtility(IRelationRegistry)
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registry.register(relationship(self, resource))
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# TODO (?): avoid duplicates
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def deassignResource(self, resource, relationships=None):
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if relationships is None:
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relationships = [ResourceRelation]
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registry = zapi.getUtility(IRelationRegistry)
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relations = registry.query(first=self, second=resource,
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relationships=relationships)
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for rel in relations:
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registry.unregister(relation)
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# concept manager
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class ConceptManager(BTreeContainer):
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implements(IConceptManager, ILoopsContained)
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typeConcept = None
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typePredicate = None
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defaultPredicate = None
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def getLoopsRoot(self):
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return zapi.getParent(self)
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def getTypePredicate(self):
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if self.typePredicate is None:
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self.typePredicate = self['hasType']
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return self.typePredicate
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def getTypeConcept(self):
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if self.typeConcept is None:
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self.typeConcept = self['type']
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return self.typeConcept
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def getDefaultPredicate(self):
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if self.defaultPredicate is None:
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self.defaultPredicate = self['standard']
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return self.defaultPredicate
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def getViewManager(self):
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return self.getLoopsRoot().getViewManager()
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# adapters and similar components
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class ConceptSourceList(object):
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implements(schema.interfaces.IIterableSource)
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def __init__(self, context):
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#self.context = context
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self.context = removeSecurityProxy(context)
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root = self.context.getLoopsRoot()
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self.concepts = root.getConceptManager()
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def __iter__(self):
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for obj in self.concepts.values():
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yield obj
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def __len__(self):
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return len(self.concepts)
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class ConceptTypeSourceList(object):
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implements(schema.interfaces.IIterableSource)
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def __init__(self, context):
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self.context = context
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#self.context = removeSecurityProxy(context)
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root = self.context.getLoopsRoot()
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self.concepts = root.getConceptManager()
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def __iter__(self):
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return iter(self.conceptTypes)
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@Lazy
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def conceptTypes(self):
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result = []
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cm = self.concepts
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typeObject = cm.getTypeConcept()
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unknownType = self.concepts.get('unknown')
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if typeObject is not None:
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typeRelation = ConceptRelation(None, typeObject, cm.getTypePredicate())
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types = typeObject.getChildren((typeRelation,))
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if typeObject not in types:
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result.append(typeObject)
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if unknownType is not None and unknownType not in types:
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result.append(unknownType)
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result.extend(types)
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return result
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def __len__(self):
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return len(self.conceptTypes)
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class SearchableText(object):
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implements(ISearchableText)
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adapts(IConcept)
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def __init__(self, context):
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self.context = context
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def searchableText(self):
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context = self.context
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return ' '.join((zapi.getName(context), context.title,))
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