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