1 /*******************************************************************************
2 * Copyright (c) 2007, 2013 Association for Decentralized Information Management
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v1.0
6 * which accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.objmap.graph.rules.domain;
14 import java.util.Collection;
16 import org.slf4j.Logger;
17 import org.slf4j.LoggerFactory;
18 import org.simantics.db.ReadGraph;
19 import org.simantics.db.Resource;
20 import org.simantics.db.WriteGraph;
21 import org.simantics.db.exception.DatabaseException;
22 import org.simantics.objmap.exceptions.MappingException;
25 * Accesses the set of objects attached to the element by the given relation.
26 * @author Hannu Niemistö
28 public class RelatedObjectsAccessor implements IDomainAccessor<Resource,Collection<Resource>> {
30 static Logger LOGGER = LoggerFactory.getLogger(RelatedObjectsAccessor.class);
33 boolean deleteExtraObjects;
35 public RelatedObjectsAccessor(Resource relation, boolean deleteExtraObjects) {
37 this.relation = relation;
38 this.deleteExtraObjects = deleteExtraObjects;
42 public Collection<Resource> get(ReadGraph g, Resource element) throws MappingException {
44 LOGGER.info(" RelatedObjectsAccessor.get");
45 return g.getObjects(element, relation);
46 } catch (DatabaseException e) {
47 throw new MappingException(e);
52 public boolean set(WriteGraph g, Resource element, Collection<Resource> value)
53 throws MappingException {
55 LOGGER.info(" RelatedObjectsAccessor.set");
56 return MappingUtils.synchronizeStatements(g, element, relation,
57 value.toArray(new Resource[value.size()]), deleteExtraObjects);
58 } catch (DatabaseException e) {
59 throw new MappingException(e);