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.graph.rules;
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14 import java.util.ArrayList;
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15 import java.util.Collection;
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17 import org.apache.log4j.Logger;
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18 import org.simantics.db.ReadGraph;
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19 import org.simantics.db.WriteGraph;
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20 import org.simantics.objmap.backward.IBackwardMapping;
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21 import org.simantics.objmap.bidirectional.IBidirectionalMappingRule;
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22 import org.simantics.objmap.exceptions.MappingException;
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23 import org.simantics.objmap.forward.IForwardMapping;
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24 import org.simantics.objmap.graph.rules.domain.IDomainAccessor;
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25 import org.simantics.objmap.graph.rules.range.IRangeAccessor;
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29 * A rule that synchronizes collection of elements between
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30 * domain and range accessors. Elements are mapped from
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31 * between domain and range during the synchronization.
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32 * @author Hannu Niemistö
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34 public class MappedElementsRule<Domain, Range> implements IBidirectionalMappingRule<Domain, Range> {
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36 static Logger LOGGER = Logger.getLogger("org.simantics.objmap");
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38 IDomainAccessor<Domain,Collection<Domain>> domainAccessor;
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39 IRangeAccessor<Range,Collection<Range>> rangeAccessor;
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41 public MappedElementsRule(IDomainAccessor<Domain,Collection<Domain>> domainAccessor,
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42 IRangeAccessor<Range,Collection<Range>> rangeAccessor) {
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43 this.domainAccessor = domainAccessor;
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44 this.rangeAccessor = rangeAccessor;
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48 public boolean updateDomain(WriteGraph g, IBackwardMapping<Domain, Range> map,
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49 Domain domainElement, Range rangeElement)
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50 throws MappingException {
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51 LOGGER.info(" MappedElementsRule.updateDomain");
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52 // Snapshot the accessed range value for concurrency safety.
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53 // NOTE: still assumes that the accessed collection is concurrent or
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54 // synchronized for toArray to be atomic.
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55 Collection<Range> value = rangeAccessor.get(rangeElement);
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56 Object[] rangeSnapshot = value.toArray();
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57 ArrayList<Domain> mappedValue = new ArrayList<Domain>(rangeSnapshot.length);
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58 for (Object obj : rangeSnapshot)
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59 mappedValue.add(map.inverseMap(g, (Range)obj));//map.inverseGet((Range)obj));
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60 return domainAccessor.set(g, domainElement, mappedValue);
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64 public boolean updateRange(ReadGraph g, IForwardMapping<Domain, Range> map,
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65 Domain domainElement, Range rangeElement)
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66 throws MappingException {
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67 LOGGER.info(" MappedElementsRule.updateRange");
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68 Collection<Domain> value = domainAccessor.get(g, domainElement);
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69 ArrayList<Range> mappedValue = new ArrayList<Range>(value.size());
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70 for(Domain r : value)
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71 mappedValue.add(map.map(g, r));//map.get(r));
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72 return rangeAccessor.set(rangeElement, mappedValue);
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75 public void createDomain(WriteGraph g, IBackwardMapping<Domain,Range> map, Domain domainElement, Range rangeElement) throws MappingException {
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76 updateDomain(g, map, domainElement, rangeElement);
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79 public void createRange(ReadGraph g, IForwardMapping<Domain,Range> map, Domain domainElement, Range rangeElement) throws MappingException {
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80 updateRange(g, map, domainElement, rangeElement);
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