bundles/org.simantics.diagram/src/org/simantics/diagram/profile/DiagramElementGroup.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.profile;\r
  13 \r
  14 import java.util.Collection;\r
  15 import java.util.HashSet;\r
  16 import java.util.Set;\r
  17 \r
  18 import org.simantics.db.ReadGraph;\r
  19 import org.simantics.db.RequestProcessor;\r
  20 import org.simantics.db.Resource;\r
  21 import org.simantics.db.common.primitiverequest.OrderedSet;\r
  22 import org.simantics.db.common.procedure.wrapper.SetListenerToSingleSetListener;\r
  23 import org.simantics.db.common.request.BinaryRead;\r
  24 import org.simantics.db.exception.DatabaseException;\r
  25 import org.simantics.db.procedure.SetListener;\r
  26 import org.simantics.diagram.stubs.DiagramResource;\r
  27 import org.simantics.scenegraph.profile.Group;\r
  28 \r
  29 /**\r
  30  * @author Tuukka Lehtonen\r
  31  */\r
  32 public abstract class DiagramElementGroup implements Group {\r
  33 \r
  34     protected DiagramResource DIA;\r
  35 \r
  36     public DiagramElementGroup(ReadGraph graph) {\r
  37         this.DIA = DiagramResource.getInstance(graph);\r
  38     }\r
  39 \r
  40     @Override\r
  41     public void trackItems(RequestProcessor processor, final Resource runtimeDiagram, final SetListener<Resource> listener) {\r
  42         processor.asyncRequest(new BinaryRead<Class<?>, Resource, Collection<Resource>>(getClass(), runtimeDiagram) {\r
  43 \r
  44             @Override\r
  45             public Set<Resource> perform(ReadGraph graph) throws DatabaseException {\r
  46                 HashSet<Resource> result = new HashSet<Resource>();\r
  47 \r
  48                 Resource realDiagram = graph.getPossibleObject(parameter2, DIA.RuntimeDiagram_HasConfiguration);\r
  49                 if (realDiagram == null)\r
  50                     return result;\r
  51 \r
  52                 Collection<Resource> elements = graph.syncRequest(new OrderedSet(realDiagram));\r
  53                 for (Resource element : elements) {\r
  54                     if (test(graph, element)) {\r
  55                         result.add(element);\r
  56                     }\r
  57                 }\r
  58 \r
  59                 return result;\r
  60             }\r
  61 \r
  62         }, new SetListenerToSingleSetListener<Resource>(listener));\r
  63     }\r
  64 \r
  65     protected abstract boolean test(ReadGraph graph, Resource element) throws DatabaseException;\r
  66 \r
  67 }\r