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