bundles/org.simantics.color.ontology/src/org/simantics/color/ColorResource.java

   1 package org.simantics.color;\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 ColorResource {\r
  12     \r
  13     public final Resource RGB;\r
  14         \r
  15     public static class URIs {\r
  16         public static final String RGB = "http://www.simantics.org/Color-1.1/RGB";\r
  17     }\r
  18     \r
  19     public static Resource getResourceOrNull(ReadGraph graph, String uri) {\r
  20         try {\r
  21             return graph.getResource(uri);\r
  22         } catch(DatabaseException e) {\r
  23             System.err.println(e.getMessage());\r
  24             return null;\r
  25         }\r
  26     }\r
  27     \r
  28     public ColorResource(ReadGraph graph) {\r
  29         RGB = getResourceOrNull(graph, URIs.RGB);\r
  30     }\r
  31     \r
  32     public static ColorResource getInstance(ReadGraph graph) {\r
  33         Session session = graph.getSession();\r
  34         ColorResource ret = session.peekService(ColorResource.class);\r
  35         if(ret == null) {\r
  36             QueryControl qc = graph.getService(QueryControl.class);\r
  37             ret = new ColorResource(qc.getIndependentGraph(graph));\r
  38             session.registerService(ColorResource.class, ret);\r
  39         }\r
  40         return ret;\r
  41     }\r
  42     \r
  43     public static ColorResource getInstance(RequestProcessor session) throws DatabaseException {\r
  44         ColorResource ret = session.peekService(ColorResource.class);\r
  45         if(ret == null) {\r
  46             ret = session.syncRequest(new Read<ColorResource>() {\r
  47                 public ColorResource perform(ReadGraph graph) throws DatabaseException {\r
  48                     QueryControl qc = graph.getService(QueryControl.class);\r
  49                     return new ColorResource(qc.getIndependentGraph(graph));\r
  50                 }\r
  51             });\r
  52             session.registerService(ColorResource.class, ret);\r
  53         }\r
  54         return ret;\r
  55     }\r
  56     \r
  57 }\r
  58 \r