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