bundles/org.simantics.modeling/src/org/simantics/modeling/typicals/rules/InstanceOfRule.java

   1 /*******************************************************************************
   2  * Copyright (c) 2013 Association for Decentralized Information Management in
   3  * Industry THTH ry.
   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
   8  *
   9  * Contributors:
  10  *     Semantum Oy - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.modeling.typicals.rules;
  13
  14 import java.util.Collection;
  15
  16 import org.simantics.db.Resource;
  17 import org.simantics.db.WriteGraph;
  18 import org.simantics.db.common.utils.NameUtils;
  19 import org.simantics.db.exception.DatabaseException;
  20 import org.simantics.layer0.Layer0;
  21 import org.simantics.modeling.typicals.ITypicalSynchronizationRule;
  22 import org.simantics.modeling.typicals.TypicalInfo;
  23
  24 /**
  25  * Synchronizes L0.InstanceOf relations from template to instance.
  26  *
  27  * @author Tuukka Lehtonen
  28  */
  29 public enum InstanceOfRule implements ITypicalSynchronizationRule {
  30
  31     INSTANCE;
  32
  33     public static InstanceOfRule getInstance() {
  34         return INSTANCE;
  35     }
  36
  37     @Override
  38     public boolean synchronize(WriteGraph graph, Resource template, Resource instance, TypicalInfo info) throws DatabaseException {
  39         boolean changed = false;
  40         Layer0 L0 = Layer0.getInstance(graph);
  41         Collection<Resource> templateInstanceOf = graph.getObjects(template, L0.InstanceOf);
  42         Collection<Resource> instanceInstanceOf = graph.getObjects(instance, L0.InstanceOf);
  43
  44         for (Resource instanceOf : templateInstanceOf) {
  45             if (!graph.hasStatement(instance, L0.InstanceOf, instanceOf)) {
  46                 graph.claim(instance, L0.InstanceOf, instanceOf);
  47                 info.messageLog.add("\t\t\tadd type  " + NameUtils.getSafeName(graph, instanceOf));
  48                 changed = true;
  49             }
  50         }
  51         for (Resource instanceOf : instanceInstanceOf) {
  52             if (!templateInstanceOf.contains(instanceOf) && graph.hasStatement(instance, L0.InstanceOf, instanceOf)) {
  53                 graph.deny(instance, L0.InstanceOf, instanceOf);
  54                 info.messageLog.add("\t\t\tremove type " + NameUtils.getSafeName(graph, instanceOf));
  55                 changed = true;
  56             }
  57         }
  58
  59         return changed;
  60     }
  61
  62 }