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.Arrays;
16 import org.simantics.databoard.binding.Binding;
17 import org.simantics.databoard.binding.OptionalBinding;
18 import org.simantics.db.ReadGraph;
19 import org.simantics.db.Resource;
20 import org.simantics.db.Statement;
21 import org.simantics.db.WriteGraph;
22 import org.simantics.db.exception.BindingException;
23 import org.simantics.db.exception.DatabaseException;
24 import org.simantics.db.exception.DoesNotContainValueException;
25 import org.simantics.db.exception.ServiceException;
26 import org.simantics.layer0.Layer0;
27 import org.simantics.objmap.exceptions.MappingException;
28 import org.slf4j.Logger;
29 import org.slf4j.LoggerFactory;
32 * Accesses a value attached to the element by given functional relation.
33 * @author Hannu Niemist�
35 public class RelatedValueAccessor implements IDomainAccessor<Resource,Object> {
37 static Logger LOGGER = LoggerFactory.getLogger(RelatedValueAccessor.class);
43 public RelatedValueAccessor(Resource relation, Resource valueType, Binding valueBinding) {
44 this.relation = relation;
45 this.valueType = valueType;
46 this.valueBinding = valueBinding;
50 public Object get(ReadGraph g, Resource element) throws MappingException {
52 LOGGER.trace(" RelatedValueAccessor.get");
53 Resource valueResource = g.getPossibleObject(element, relation);
54 if(valueResource == null)
56 return getValue(g, valueResource);
57 } catch (DatabaseException e) {
58 throw new MappingException(e);
63 public boolean set(WriteGraph g, Resource element, Object value)
64 throws MappingException {
66 LOGGER.trace(" RelatedValueAccessor.set");
67 Statement valueStatement = g.getPossibleStatement(element, relation);
68 if(valueStatement == null) {
71 Resource valueResource = g.newResource();
72 g.claim(valueResource, Layer0.getInstance(g).InstanceOf, null,
74 g.claim(element, relation, valueResource);
75 claimValue(g, valueResource, value);
81 if (!valueStatement.isAsserted(element)) {
82 g.deny(valueStatement.getObject());
88 Object currentValue = getValue(g, valueStatement.getObject());
89 if(equals(currentValue,value))
91 if (!valueStatement.isAsserted(element))
92 g.claimValue(valueStatement.getObject(), value);
94 Resource valueResource = g.newResource();
95 g.claim(valueResource, Layer0.getInstance(g).InstanceOf, null,
97 g.claim(element, relation, valueResource);
98 claimValue(g, valueResource, value);
102 } catch (DatabaseException e) {
103 throw new MappingException(e);
108 private Object getValue(ReadGraph g, Resource valueResource)
109 throws DoesNotContainValueException, BindingException, ServiceException {
110 if (valueBinding != null) {
111 return g.getValue(valueResource, getBaseBinding(valueBinding));
114 return g.getValue(valueResource);
118 private void claimValue(WriteGraph g, Resource valueResource, Object value) throws ServiceException {
119 if (valueBinding != null)
120 g.claimValue(valueResource, value, getBaseBinding(valueBinding));
122 g.claimValue(valueResource, value);
125 private static Binding getBaseBinding(Binding binding) {
126 return binding instanceof OptionalBinding ? ((OptionalBinding)binding).getComponentBinding() : binding;
129 private boolean equals(Object o1, Object o2) {
130 if (valueBinding != null)
131 return valueBinding.equals(o1, o2);
133 if (o1 instanceof boolean[])
134 Arrays.equals((boolean[])o1,(boolean[])o2);
135 if (o1 instanceof int[])
136 Arrays.equals((int[])o1,(int[])o2);
137 if (o1 instanceof float[])
138 Arrays.equals((float[])o1,(float[])o2);
139 if (o1 instanceof double[])
140 Arrays.equals((double[])o1,(double[])o2);
141 if (o1 instanceof byte[])
142 Arrays.equals((byte[])o1,(byte[])o2);
143 return o1.equals(o2);