1 /*******************************************************************************
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2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.diagram.synchronization.graph;
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14 import java.util.HashMap;
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16 import org.simantics.databoard.Bindings;
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17 import org.simantics.db.Resource;
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18 import org.simantics.db.WriteGraph;
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19 import org.simantics.db.common.CommentMetadata;
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20 import org.simantics.db.common.request.IndexRoot;
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21 import org.simantics.db.common.utils.OrderedSetUtils;
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22 import org.simantics.db.exception.DatabaseException;
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23 import org.simantics.db.layer0.adapter.Remover;
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24 import org.simantics.db.layer0.exception.CannotRemoveException;
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25 import org.simantics.db.layer0.util.RemoverUtil;
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26 import org.simantics.diagram.content.ConnectionUtil;
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27 import org.simantics.diagram.stubs.DiagramResource;
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28 import org.simantics.diagram.synchronization.ModificationAdapter;
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29 import org.simantics.layer0.Layer0;
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30 import org.simantics.scl.commands.Commands;
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33 * @author Tuukka Lehtonen
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35 public class RemoveElement extends ModificationAdapter {
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38 Resource removedElement;
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40 public RemoveElement(Resource diagram, Resource removed) {
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41 super(REMOVE_NODE_PRIORITY);
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44 throw new NullPointerException();
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46 throw new NullPointerException();
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48 this.diagram = diagram;
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49 this.removedElement = removed;
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53 public void perform(WriteGraph g) throws DatabaseException {
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54 Commands.get(g, "Simantics/Diagram/removeElement")
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55 .execute(g, g.syncRequest(new IndexRoot(diagram)), diagram, removedElement);
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58 public static void removeElement(WriteGraph g, Resource diagram, Resource removedElement) throws DatabaseException {
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59 boolean connection = g.isInstanceOf(removedElement, DiagramResource.getInstance(g).Connection);
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60 String elementName = "";
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61 // Remove element from all layers if possible.
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62 DiagramResource DIA = DiagramResource.getInstance(g);
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63 g.deny(removedElement, DIA.IsVisible);
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64 g.deny(removedElement, DIA.IsFocusable);
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67 ConnectionUtil cu = new ConnectionUtil(g);
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68 cu.removeConnection(removedElement);
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70 Remover r = RemoverUtil.getPossibleRemover(g, removedElement);
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72 String problem = r.canRemove(g, new HashMap<Object, Object>(4));
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73 if (problem != null) {
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74 throw new CannotRemoveException(problem);
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78 // Perform custom removals through ElementWriter adaption.
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79 // FIXME: should be able to use getSingleType if everything else goes correctly??
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80 Resource elementType = g.getPossibleType(removedElement, DiagramResource.getInstance(g).Element);
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81 if (elementType != null) {
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82 ElementWriter writer = g.adapt(elementType, ElementWriter.class);
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83 writer.removeFromGraph(g, removedElement);
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86 // Remove element from diagram
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87 OrderedSetUtils.remove(g, diagram, removedElement);
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88 elementName = g.getPossibleRelatedValue2(removedElement, Layer0.getInstance(g).HasName, Bindings.STRING);
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89 RemoverUtil.remove(g, removedElement);
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92 // Add comment to change set.
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93 CommentMetadata cm = g.getMetadata(CommentMetadata.class);
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94 g.addMetadata(cm.add("Removed element " + elementName + " " + removedElement));
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