org.simantics.interop/src/org/simantics/interop/stubs/InteropResource.java

   1 package org.simantics.interop.stubs;\r
   2 \r
   3 import org.simantics.db.Resource;\r
   4 import org.simantics.db.ReadGraph;\r
   5 import org.simantics.db.request.Read;\r
   6 import org.simantics.db.Session;\r
   7 import org.simantics.db.exception.DatabaseException;\r
   8 \r
   9 public class InteropResource {\r
  10     \r
  11     public final Resource HasDestination;\r
  12     public final Resource HasSource;\r
  13     public final Resource ImportLibrary;\r
  14         \r
  15     public static class URIs {\r
  16         public static final String HasDestination = "http://www.simantics.org/Interop-1.0/HasDestination";\r
  17         public static final String HasSource = "http://www.simantics.org/Interop-1.0/HasSource";\r
  18         public static final String ImportLibrary = "http://www.simantics.org/Interop-1.0/ImportLibrary";\r
  19     }\r
  20     \r
  21     public static Resource getResourceOrNull(ReadGraph graph, String uri) {\r
  22         try {\r
  23             return graph.getResource(uri);\r
  24         } catch(DatabaseException e) {\r
  25             System.err.println(e.getMessage());\r
  26             return null;\r
  27         }\r
  28     }\r
  29     \r
  30     public InteropResource(ReadGraph graph) {\r
  31         HasDestination = getResourceOrNull(graph, URIs.HasDestination);\r
  32         HasSource = getResourceOrNull(graph, URIs.HasSource);\r
  33         ImportLibrary = getResourceOrNull(graph, URIs.ImportLibrary);\r
  34     }\r
  35     \r
  36     public static InteropResource getInstance(ReadGraph graph) {\r
  37         Session session = graph.getSession();\r
  38         InteropResource ret = session.peekService(InteropResource.class);\r
  39         if(ret == null) {\r
  40             ret = new InteropResource(graph);\r
  41             session.registerService(InteropResource.class, ret);\r
  42         }\r
  43         return ret;\r
  44     }\r
  45     \r
  46     public static InteropResource getInstance(Session session) throws DatabaseException {\r
  47         InteropResource ret = session.peekService(InteropResource.class);\r
  48         if(ret == null) {\r
  49             ret = session.syncRequest(new Read<InteropResource>() {\r
  50                 public InteropResource perform(ReadGraph graph) throws DatabaseException {\r
  51                     return new InteropResource(graph);\r
  52                 }\r
  53             });\r
  54             session.registerService(InteropResource.class, ret);\r
  55         }\r
  56         return ret;\r
  57     }\r
  58     \r
  59 }\r
  60 \r