bundles/org.simantics.action.ontology/src/org/simantics/action/ontology/ActionResource.java

   1 package org.simantics.action.ontology;\r
   2 \r
   3 import org.simantics.db.RequestProcessor;\r
   4 import org.simantics.db.Resource;\r
   5 import org.simantics.db.ReadGraph;\r
   6 import org.simantics.db.request.Read;\r
   7 import org.simantics.db.Session;\r
   8 import org.simantics.db.exception.DatabaseException;\r
   9 import org.simantics.db.service.QueryControl;\r
  10 \r
  11 public class ActionResource {\r
  12     \r
  13     public final Resource Action;\r
  14     public final Resource DropAction;\r
  15         \r
  16     public static class URIs {\r
  17         public static final String Action = "http://www.simantics.org/Action-1.1/Action";\r
  18         public static final String DropAction = "http://www.simantics.org/Action-1.1/DropAction";\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 ActionResource(ReadGraph graph) {\r
  31         Action = getResourceOrNull(graph, URIs.Action);\r
  32         DropAction = getResourceOrNull(graph, URIs.DropAction);\r
  33     }\r
  34     \r
  35     public static ActionResource getInstance(ReadGraph graph) {\r
  36         Session session = graph.getSession();\r
  37         ActionResource ret = session.peekService(ActionResource.class);\r
  38         if(ret == null) {\r
  39             QueryControl qc = graph.getService(QueryControl.class);\r
  40             ret = new ActionResource(qc.getIndependentGraph(graph));\r
  41             session.registerService(ActionResource.class, ret);\r
  42         }\r
  43         return ret;\r
  44     }\r
  45     \r
  46     public static ActionResource getInstance(RequestProcessor session) throws DatabaseException {\r
  47         ActionResource ret = session.peekService(ActionResource.class);\r
  48         if(ret == null) {\r
  49             ret = session.syncRequest(new Read<ActionResource>() {\r
  50                 public ActionResource perform(ReadGraph graph) throws DatabaseException {\r
  51                     QueryControl qc = graph.getService(QueryControl.class);\r
  52                     return new ActionResource(qc.getIndependentGraph(graph));\r
  53                 }\r
  54             });\r
  55             session.registerService(ActionResource.class, ret);\r
  56         }\r
  57         return ret;\r
  58     }\r
  59     \r
  60 }\r
  61 \r