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