bundles/org.simantics.diagram/src/org/simantics/diagram/synchronization/graph/BasicResources.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;\r
  13 \r
  14 import org.simantics.db.ReadGraph;\r
  15 import org.simantics.db.Session;\r
  16 import org.simantics.db.exception.DatabaseException;\r
  17 import org.simantics.db.request.Read;\r
  18 import org.simantics.diagram.stubs.DiagramResource;\r
  19 import org.simantics.diagram.stubs.G2DResource;\r
  20 import org.simantics.layer0.Layer0;\r
  21 import org.simantics.structural.stubs.StructuralResource2;\r
  22 \r
  23 /**\r
  24  * @author Tuukka Lehtonen\r
  25  */\r
  26 public final class BasicResources {\r
  27 \r
  28     public final Layer0              L0;\r
  29     public final G2DResource         G2D;\r
  30     public final DiagramResource     DIA;\r
  31     public final StructuralResource2 STR;\r
  32 \r
  33     public BasicResources(ReadGraph graph) {\r
  34         L0 = Layer0.getInstance(graph);\r
  35         G2D = G2DResource.getInstance(graph);\r
  36         DIA = DiagramResource.getInstance(graph);\r
  37         STR = StructuralResource2.getInstance(graph);\r
  38     }\r
  39 \r
  40     public static BasicResources getInstance(ReadGraph graph) {\r
  41         BasicResources br = graph.peekService(BasicResources.class);\r
  42         if (br == null) {\r
  43             br = new BasicResources(graph);\r
  44             graph.registerService(BasicResources.class, br);\r
  45         }\r
  46         return br;\r
  47     }\r
  48 \r
  49     public static BasicResources getInstance(Session session) throws DatabaseException {\r
  50         BasicResources ret = session.peekService(BasicResources.class);\r
  51         if(ret == null) {\r
  52             ret = session.syncRequest(new Read<BasicResources>() {\r
  53                 @Override\r
  54                 public BasicResources perform(ReadGraph graph) throws DatabaseException {\r
  55                     return new BasicResources(graph);\r
  56                 }\r
  57             });\r
  58             session.registerService(BasicResources.class, ret);\r
  59         }\r
  60         return ret;\r
  61     }\r
  62 \r
  63 }\r