bundles/org.simantics.diagram/src/org/simantics/diagram/synchronization/graph/RemoveBranchpoint.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.Collection;
  15 import java.util.Iterator;
  16
  17 import org.simantics.db.Resource;
  18 import org.simantics.db.WriteGraph;
  19 import org.simantics.db.exception.DatabaseException;
  20 import org.simantics.diagram.content.ConnectionUtil;
  21 import org.simantics.diagram.stubs.DiagramResource;
  22 import org.simantics.diagram.synchronization.ModificationAdapter;
  23 import org.simantics.g2d.element.ElementHints;
  24 import org.simantics.g2d.element.IElement;
  25
  26 /**
  27  * @author Tuukka Lehtonen
  28  */
  29 public class RemoveBranchpoint extends ModificationAdapter {
  30
  31     Resource element;
  32
  33     public RemoveBranchpoint(IElement element) {
  34         super(REMOVE_BRANCH_PRIORITY);
  35         this.element = element.getHint(ElementHints.KEY_OBJECT);
  36         assert element != null;
  37     }
  38
  39     @Override
  40     public void perform(WriteGraph g) throws DatabaseException {
  41         DiagramResource dr = DiagramResource.getInstance(g);
  42         Collection<Resource> connectors = g.getObjects(element, dr.AreConnected);
  43
  44         ConnectionUtil cu = new ConnectionUtil(g);
  45         cu.removeConnectionPart(element);
  46
  47         // If this *was* a route point, reconnect the connectors previously
  48         // connected to the route point. Otherwise just leave it.
  49         if (connectors.size() == 2) {
  50             Iterator<Resource> it = connectors.iterator();
  51             Resource c1 = it.next();
  52             Resource c2 = it.next();
  53             cu.connect(c1, c2);
  54         }
  55     }
  56
  57 }