bundles/org.simantics.diagram/src/org/simantics/diagram/synchronization/graph/PropertyModification.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in 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  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.diagram.synchronization.graph;
  13
  14 import java.util.Arrays;
  15
  16 import org.simantics.databoard.binding.Binding;
  17 import org.simantics.db.Resource;
  18 import org.simantics.db.WriteGraph;
  19 import org.simantics.db.common.CommentMetadata;
  20 import org.simantics.db.common.utils.NameUtils;
  21 import org.simantics.db.exception.DatabaseException;
  22 import org.simantics.diagram.synchronization.ModificationAdapter;
  23
  24 /**
  25  * @author Tuukka Lehtonen
  26  */
  27 public class PropertyModification extends ModificationAdapter {
  28     private final Resource owner;
  29     private final Resource relation;
  30     private final Resource type;
  31     private final Object value;
  32     private final Binding binding;
  33
  34     public PropertyModification(Resource propertyOwner, Resource propertyRelation, Resource propertyType, Object value, Binding binding) {
  35         super(LOW_PRIORITY);
  36         this.owner = propertyOwner;
  37         this.relation = propertyRelation;
  38         this.type = propertyType;
  39         this.value = value;
  40         this.binding = binding;
  41     }
  42
  43         private final boolean arrayEquals(Object av1, Object av2) {
  44                 if (av2 == null)
  45                         return false;
  46                 Class<?> c1 = av1.getClass().getComponentType();
  47                 Class<?> c2 = av2.getClass().getComponentType();
  48                 if (c2 == null || !c1.equals(c2))
  49                         return false;
  50                 boolean p1 = c1.isPrimitive();
  51                 boolean p2 = c2.isPrimitive();
  52                 if (p1 != p2)
  53                         return false;
  54                 if (!p1)
  55                         return Arrays.equals((Object[]) av1, (Object[]) av2);
  56                 if (boolean.class.equals(c1))
  57                         return Arrays.equals((boolean[]) av1, (boolean[]) av2);
  58                 else if (byte.class.equals(c1))
  59                         return Arrays.equals((byte[]) av1, (byte[]) av2);
  60                 else if (int.class.equals(c1))
  61                         return Arrays.equals((int[]) av1, (int[]) av2);
  62                 else if (long.class.equals(c1))
  63                         return Arrays.equals((long[]) av1, (long[]) av2);
  64                 else if (float.class.equals(c1))
  65                         return Arrays.equals((float[]) av1, (float[]) av2);
  66                 else if (double.class.equals(c1))
  67                         return Arrays.equals((double[]) av1, (double[]) av2);
  68                 throw new RuntimeException("??? Contact application querySupport.");
  69         }
  70
  71     private boolean sameValue(Object oldValue, Object newValue) {
  72                 if (newValue.getClass().isArray()) {
  73                         return arrayEquals(newValue, oldValue);
  74                 } else {
  75                         return newValue.equals(oldValue);
  76                 }
  77     }
  78
  79     @Override
  80     public void perform(WriteGraph g) throws DatabaseException {
  81
  82         Object existing = g.getPossibleRelatedValue(owner, relation, binding);
  83         if(!sameValue(existing, value)) {
  84                 g.markUndoPoint();
  85             DiagramGraphUtil.setRelatedValue(g, owner, relation, type, value, binding);
  86                 // Add comment to change set.
  87                 CommentMetadata cm = g.getMetadata(CommentMetadata.class);
  88                 g.addMetadata(cm.add("Changed property " + NameUtils.getSafeName(g, relation)));
  89         }
  90
  91     }
  92 }