1 /*******************************************************************************
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2 * Copyright (c) 2007, 2013 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.objmap.structural.rules.domain;
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14 import java.util.Arrays;
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16 import org.apache.log4j.Logger;
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17 import org.simantics.db.ReadGraph;
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18 import org.simantics.db.Resource;
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19 import org.simantics.db.Statement;
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20 import org.simantics.db.WriteGraph;
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21 import org.simantics.db.exception.DatabaseException;
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22 import org.simantics.layer0.Layer0;
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23 import org.simantics.objmap.exceptions.MappingException;
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24 import org.simantics.objmap.graph.rules.domain.IDomainAccessor;
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25 import org.simantics.objmap.structural.StructuralResource;
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28 public class RelatedValueAccessor implements IDomainAccessor<StructuralResource,Object> {
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30 static Logger LOGGER = Logger.getLogger("org.simantics.objmap");
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34 boolean useTypeResource;
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36 private boolean preventStructuralChanges = true;
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37 private boolean preventStructuralRootChanges = true;
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39 public RelatedValueAccessor(Resource relation, Resource valueType, boolean useTypeResource) {
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40 this.relation = relation;
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41 this.valueType = valueType;
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42 this.useTypeResource = useTypeResource;
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45 public RelatedValueAccessor(Resource relation, Resource valueType, boolean useTypeResource, boolean preventStructuralChanges, boolean preventStructuralRootChanges) {
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46 this.relation = relation;
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47 this.valueType = valueType;
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48 this.useTypeResource = useTypeResource;
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49 this.preventStructuralChanges = preventStructuralChanges;
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50 this.preventStructuralRootChanges = preventStructuralRootChanges;
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53 private boolean preventChange(StructuralResource element) {
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54 return preventStructuralChanges && element.isStructural() && (!element.isStructuralRoot()||preventStructuralRootChanges);
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58 public Object get(ReadGraph g, StructuralResource element) throws MappingException {
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60 LOGGER.info(" RelatedValueAccessor.get");
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61 Resource res = getServiceResource(g, element);
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64 Resource valueResource = g.getPossibleObject(res, relation);
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65 if(valueResource == null)
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67 return g.getValue(valueResource);
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68 } catch (DatabaseException e) {
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69 throw new MappingException(e);
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74 public boolean set(WriteGraph g, StructuralResource relement, Object value)
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75 throws MappingException {
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77 LOGGER.info(" RelatedValueAccessor.set");
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79 Resource element = getServiceResource(g, relement);
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80 if (element == null)
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82 Statement valueStatement = g.getPossibleStatement(element, relation);
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83 if(valueStatement == null) {
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86 if (preventChange(relement))
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88 Resource valueResource = g.newResource();
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89 g.claim(valueResource, Layer0.getInstance(g).InstanceOf, null,
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91 g.claim(element, relation, valueResource);
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92 g.claimValue(valueResource, value);
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97 if (preventChange(relement))
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99 if (!valueStatement.isAsserted(element)) {
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100 g.deny(valueStatement.getObject());
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107 Object currentValue = g.getValue(valueStatement.getObject());
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108 if(equals(currentValue,value))
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110 if (preventChange(relement))
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112 if (!valueStatement.isAsserted(element))
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113 g.claimValue(valueStatement.getObject(), value);
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115 Resource valueResource = g.newResource();
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116 g.claim(valueResource, Layer0.getInstance(g).InstanceOf, null,
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118 g.claim(element, relation, valueResource);
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119 g.claimValue(valueResource, value);
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123 } catch (DatabaseException e) {
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124 throw new MappingException(e);
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129 private Resource getServiceResource(ReadGraph g, StructuralResource element) {
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130 if (!useTypeResource)
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131 return element.getResource();
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132 return element.getTypeResource();
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135 private boolean equals(Object o1, Object o2) {
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136 if (o1 instanceof boolean[])
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137 Arrays.equals((boolean[])o1,(boolean[])o2);
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138 if (o1 instanceof int[])
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139 Arrays.equals((int[])o1,(int[])o2);
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140 if (o1 instanceof float[])
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141 Arrays.equals((float[])o1,(float[])o2);
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142 if (o1 instanceof double[])
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143 Arrays.equals((double[])o1,(double[])o2);
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144 if (o1 instanceof byte[])
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145 Arrays.equals((byte[])o1,(byte[])o2);
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146 return o1.equals(o2);
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