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

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.diagram.synchronization.graph;\r
  13 \r
  14 import org.simantics.db.Resource;\r
  15 import org.simantics.db.WriteGraph;\r
  16 import org.simantics.db.common.utils.OrderedSetUtils;\r
  17 import org.simantics.db.exception.DatabaseException;\r
  18 import org.simantics.diagram.content.ConnectionUtil;\r
  19 import org.simantics.diagram.stubs.DiagramResource;\r
  20 import org.simantics.diagram.synchronization.CopyAdvisor;\r
  21 import org.simantics.diagram.synchronization.IModifiableSynchronizationContext;\r
  22 import org.simantics.diagram.synchronization.ModificationAdapter;\r
  23 import org.simantics.diagram.synchronization.SynchronizationHints;\r
  24 import org.simantics.diagram.synchronization.graph.layer.GraphLayerManager;\r
  25 import org.simantics.diagram.ui.DiagramModelHints;\r
  26 import org.simantics.g2d.diagram.DiagramHints;\r
  27 import org.simantics.g2d.diagram.DiagramMutator;\r
  28 import org.simantics.g2d.diagram.IDiagram;\r
  29 import org.simantics.g2d.element.ElementHints;\r
  30 import org.simantics.g2d.element.ElementUtils;\r
  31 import org.simantics.g2d.element.IElement;\r
  32 import org.simantics.layer0.Layer0;\r
  33 import org.simantics.structural.stubs.StructuralResource2;\r
  34 \r
  35 /**\r
  36  * @author Tuukka Lehtonen\r
  37  */\r
  38 public class AddConnection extends ModificationAdapter {\r
  39 \r
  40     IModifiableSynchronizationContext context;\r
  41     IDiagram                          diagram;\r
  42     Resource                          diagramResource;\r
  43     IElement                          element;\r
  44     Resource                          copyOf;\r
  45     Resource                          connectionClassResource;\r
  46 \r
  47     public AddConnection(IModifiableSynchronizationContext context, IDiagram diagram, IElement element) {\r
  48         super(ADD_CONNECTION_PRIORITY);\r
  49         this.context = context;\r
  50         this.diagram = diagram;\r
  51         this.diagramResource = diagram.getHint(DiagramModelHints.KEY_DIAGRAM_RESOURCE);\r
  52         assert this.diagramResource != null;\r
  53         this.element = element;\r
  54         this.copyOf = element.getHint(ElementHints.KEY_COPY_OF_OBJECT);\r
  55 \r
  56         this.connectionClassResource = ElementUtils.checkedAdapt(element.getElementClass(), Resource.class);\r
  57     }\r
  58 \r
  59     @Override\r
  60     public void perform(WriteGraph graph) throws DatabaseException {\r
  61         ConnectionUtil cu = new ConnectionUtil(graph);\r
  62         DiagramMutator mutator = diagram.getHint(DiagramHints.KEY_MUTATOR);\r
  63 \r
  64         Resource resource = null;\r
  65 \r
  66         // 3. Try to copy the element from an existing element if requested.\r
  67         if (copyOf != null) {\r
  68             CopyAdvisor ca = diagram.getHint(SynchronizationHints.COPY_ADVISOR);\r
  69             if (ca != null) {\r
  70                 Resource sourceDiagram = graph.getPossibleObject(copyOf, Layer0.getInstance(graph).PartOf);\r
  71                 if (sourceDiagram == null)\r
  72                     sourceDiagram = OrderedSetUtils.getSingleOwnerList(graph, copyOf, DiagramResource.getInstance(graph).Diagram);\r
  73                 resource = CopyAdvisorUtil.copy(context, graph, ca, copyOf, sourceDiagram, diagramResource);\r
  74                 if (resource != null) {\r
  75                     OrderedSetUtils.addFirst(graph, diagramResource, resource);\r
  76                 }\r
  77             }\r
  78         }\r
  79 \r
  80         if (resource == null)\r
  81             resource = cu.newConnection(diagramResource, connectionClassResource);\r
  82 \r
  83         if (copyOf != null)\r
  84             copyConnectionType(graph, copyOf, resource);\r
  85 \r
  86         element.setHint(ElementHints.KEY_OBJECT, resource);\r
  87         mutator.register(element, resource);\r
  88 \r
  89         GraphLayerManager glm = context.get(GraphSynchronizationHints.GRAPH_LAYER_MANAGER);\r
  90         if (glm != null) {\r
  91             glm.removeFromAllLayers(graph, resource);\r
  92             glm.putElementOnVisibleLayers(diagram, graph, resource);\r
  93         }\r
  94     }\r
  95 \r
  96     public static void copyConnectionType(WriteGraph graph, Resource source, Resource target) throws DatabaseException {\r
  97         // Copy HasConnectionType relation\r
  98         StructuralResource2 sr = StructuralResource2.getInstance(graph);\r
  99         Resource connectionType = graph.getPossibleObject(source, sr.HasConnectionType);\r
 100         if (connectionType != null) {\r
 101             graph.deny(target, sr.HasConnectionType);\r
 102             graph.claim(target, sr.HasConnectionType, null, connectionType);\r
 103         }\r
 104     }\r
 105 \r
 106 }\r