bundles/org.simantics.diagram/src/org/simantics/diagram/synchronization/graph/layer/GraphLayerUtil.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.layer;
  13
  14 import org.simantics.db.Resource;
  15 import org.simantics.db.WriteGraph;
  16 import org.simantics.db.exception.DatabaseException;
  17 import org.simantics.db.exception.ManyObjectsForFunctionalRelationException;
  18 import org.simantics.db.exception.ServiceException;
  19 import org.simantics.diagram.stubs.DiagramResource;
  20 import org.simantics.layer0.Layer0;
  21
  22 /**
  23  * Utilities for manipulating diagram layers in the graph.
  24  *
  25  * @author Tuukka Lehtonen
  26  */
  27 public final class GraphLayerUtil {
  28
  29     WriteGraph      graph;
  30     Layer0          l0;
  31     DiagramResource dia;
  32
  33     public GraphLayerUtil(WriteGraph graph) {
  34         this.graph = graph;
  35         this.l0 = Layer0.getInstance(graph);
  36         this.dia = DiagramResource.getInstance(graph);
  37     }
  38
  39     public GraphLayer createLayer(String layerName, boolean active) throws DatabaseException {
  40         Resource layer = graph.newResource();
  41         graph.claim(layer, l0.InstanceOf, null, dia.Layer);
  42
  43         // Assign tagging relations
  44         Resource visibleTag = newTag(dia.IsVisible);
  45         Resource focusableTag = newTag(dia.IsFocusable);
  46         graph.claim(layer, dia.HasVisibleTag, visibleTag);
  47         graph.claim(layer, dia.HasFocusableTag, focusableTag);
  48
  49         // Assign shared name property for all, the layer and the tags
  50         Resource name = graph.newResource();
  51         graph.claim(name, l0.InstanceOf, null, l0.String);
  52         graph.claimValue(name, layerName);
  53
  54         graph.claim(layer, l0.HasName, name);
  55         graph.claim(visibleTag, l0.HasName, name);
  56         graph.claim(focusableTag, l0.HasName, name);
  57
  58         setLayerActive(layer, active);
  59
  60         return new GraphLayer(layerName, layer, visibleTag, focusableTag);
  61     }
  62
  63     public Resource newTag(Resource baseTag) throws DatabaseException {
  64         Resource tag = graph.newResource();
  65         graph.claim(tag, l0.SubrelationOf, baseTag);
  66         graph.claim(tag, l0.InverseOf, tag);
  67         return tag;
  68     }
  69
  70     public void setLayerActive(Resource layer, boolean active) throws ManyObjectsForFunctionalRelationException, ServiceException {
  71         graph.claimLiteral(layer, dia.IsActive, Boolean.valueOf(active));
  72     }
  73
  74 }