org.simantics.interop/src/org/simantics/interop/stubs/InteropResource.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.interop.stubs;\r
  13 \r
  14 \r
  15 import org.simantics.db.Resource;\r
  16 import org.simantics.db.ReadGraph;\r
  17 import org.simantics.db.request.Read;\r
  18 import org.simantics.db.Session;\r
  19 import org.simantics.db.exception.DatabaseException;\r
  20 \r
  21 public class InteropResource {\r
  22     \r
  23     public final Resource ImportLibrary;\r
  24     public final Resource InteropFeature;\r
  25     \r
  26     public static class URIs {\r
  27         public static final String ImportLibrary = "http://www.simantics.org/Interoperability-1.0/Types/ImportLibrary";\r
  28         public static final String InteropFeature = "http://www.simantics.org/Interoperability-1.0/InteropFeature";\r
  29     }\r
  30     \r
  31     public static Resource getResourceOrNull(ReadGraph graph, String uri) {\r
  32         try {\r
  33             return graph.getResource(uri);\r
  34         } catch(DatabaseException e) {\r
  35             System.err.println(e.getMessage());\r
  36             return null;\r
  37         }\r
  38     }\r
  39     \r
  40     public InteropResource(ReadGraph graph) {\r
  41         ImportLibrary = getResourceOrNull(graph, URIs.ImportLibrary);\r
  42         InteropFeature = getResourceOrNull(graph, URIs.InteropFeature);\r
  43     }\r
  44     \r
  45     public static InteropResource getInstance(ReadGraph graph) {\r
  46         Session session = graph.getSession();\r
  47         InteropResource ret = session.peekService(InteropResource.class);\r
  48         if(ret == null) {\r
  49             ret = new InteropResource(graph);\r
  50             session.registerService(InteropResource.class, ret);\r
  51         }\r
  52         return ret;\r
  53     }\r
  54     \r
  55     public static InteropResource getInstance(Session session) throws DatabaseException {\r
  56         InteropResource ret = session.peekService(InteropResource.class);\r
  57         if(ret == null) {\r
  58             ret = session.syncRequest(new Read<InteropResource>() {\r
  59                 public InteropResource perform(ReadGraph graph) throws DatabaseException {\r
  60                     return new InteropResource(graph);\r
  61                 }\r
  62             });\r
  63             session.registerService(InteropResource.class, ret);\r
  64         }\r
  65         return ret;\r
  66     }\r
  67     \r
  68 }\r
  69 \r