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 org.apache.log4j.Logger;
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15 import org.simantics.db.ReadGraph;
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16 import org.simantics.db.Resource;
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17 import org.simantics.db.WriteGraph;
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18 import org.simantics.db.exception.DatabaseException;
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19 import org.simantics.objmap.exceptions.MappingException;
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20 import org.simantics.objmap.graph.rules.domain.IDomainAccessor;
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21 import org.simantics.objmap.structural.StructuralResource;
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24 public class RelatedObjectAccessor implements IDomainAccessor<StructuralResource,StructuralResource> {
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26 static Logger LOGGER = Logger.getLogger("org.simantics.objmap");
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29 boolean useTypeResource;
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31 private boolean preventStructuralChanges = true;
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32 private boolean preventStructuralRootChanges = true;
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34 public RelatedObjectAccessor(Resource relation, boolean useTypeResource) {
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35 this.relation = relation;
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36 this.useTypeResource = useTypeResource;
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39 public RelatedObjectAccessor(Resource relation, boolean useTypeResource, boolean preventStructuralChanges, boolean preventStructuralRootChanges) {
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40 this.relation = relation;
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41 this.useTypeResource = useTypeResource;
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42 this.preventStructuralChanges = preventStructuralChanges;
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43 this.preventStructuralRootChanges = preventStructuralRootChanges;
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46 private boolean preventChange(StructuralResource element) {
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47 return preventStructuralChanges && element.isStructural() && (!element.isStructuralRoot()||preventStructuralRootChanges);
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51 public StructuralResource get(ReadGraph g, StructuralResource element) throws MappingException {
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53 LOGGER.info(" RelatedObjectAccessor.get");
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54 Resource res = getServiceResource(g, element);
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57 Resource r = g.getPossibleObject(res, relation);
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60 if (StructuralUtils.isStructuralInstance(g, r)) {
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61 return new StructuralResource(g, r, element.getContext(),r);
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63 return new StructuralResource(g, r, element.getContext());
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65 } catch (DatabaseException e) {
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66 throw new MappingException(e);
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71 public boolean set(WriteGraph g, StructuralResource selement, StructuralResource value)
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72 throws MappingException {
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74 LOGGER.info(" RelatedObjectAccessor.set");
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75 Resource element = getServiceResource(g, selement);
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76 if (element == null)
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78 Resource resource = g.getPossibleObject(element, relation);
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79 if(resource == null) {
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82 if (preventChange(selement))
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84 g.claim(element, relation, value.getResource());
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87 else if(resource.equals(value))
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90 if (preventChange(selement))
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92 g.deny(element, relation);
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94 g.claim(element, relation, value.getResource());
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97 } catch (DatabaseException e) {
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98 throw new MappingException(e);
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105 private Resource getServiceResource(ReadGraph g, StructuralResource element) {
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106 if(!useTypeResource)
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107 return element.getResource();
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108 return element.getTypeResource();
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