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;
14 import org.slf4j.Logger;
15 import org.slf4j.LoggerFactory;
17 import java.util.Objects;
19 import org.simantics.db.ReadGraph;
20 import org.simantics.db.WriteGraph;
21 import org.simantics.objmap.backward.IBackwardMapping;
22 import org.simantics.objmap.bidirectional.IBidirectionalMappingRule;
23 import org.simantics.objmap.exceptions.MappingException;
24 import org.simantics.objmap.forward.IForwardMapping;
25 import org.simantics.objmap.graph.rules.domain.IDomainAccessor;
26 import org.simantics.objmap.graph.rules.range.IRangeAccessor;
30 * A rule that synchronizes values between domain and
32 * @author Hannu Niemistö
34 public class ValueRule<Domain, Range> implements IBidirectionalMappingRule<Domain, Range> {
36 static Logger LOGGER = LoggerFactory.getLogger(ValueRule.class);
38 IDomainAccessor<Domain,Object> domainAccessor;
39 IRangeAccessor<Range,Object> rangeAccessor;
41 public ValueRule(IDomainAccessor<Domain,Object> domainAccessor,
42 IRangeAccessor<Range,Object> rangeAccessor) {
43 this.domainAccessor = domainAccessor;
44 this.rangeAccessor = rangeAccessor;
48 public boolean updateDomain(WriteGraph g, IBackwardMapping<Domain, Range> map,
49 Domain domainElement, Range rangeElement)
50 throws MappingException {
51 LOGGER.trace(" ValueRule.updateDomain");
52 Object value = rangeAccessor.get(rangeElement);
53 return domainAccessor.set(g, domainElement, value);
57 public boolean updateRange(ReadGraph g, IForwardMapping<Domain, Range> map,
58 Domain domainElement, Range rangeElement)
59 throws MappingException {
60 LOGGER.trace(" ValueRule.updateRange");
61 Object value = domainAccessor.get(g, domainElement);
62 return rangeAccessor.set(rangeElement, value);
66 public boolean checkChanges(ReadGraph g, IForwardMapping<Domain, Range> map, Domain domainElement,
67 Range rangeElement) throws MappingException {
68 Object value = rangeAccessor.get(rangeElement);
69 return Objects.equals(value, domainAccessor.get(g, domainElement));
72 public void createDomain(WriteGraph g, IBackwardMapping<Domain,Range> map, Domain domainElement, Range rangeElement) throws MappingException {
73 updateDomain(g, map, domainElement, rangeElement);
75 public void createRange(ReadGraph g, IForwardMapping<Domain,Range> map, Domain domainElement, Range rangeElement) throws MappingException {
76 updateRange(g, map, domainElement, rangeElement);