org.simantics.district.region.ontology/src/org/simantics/district/region/ontology/DiagramRegionsResource.java

   1 package org.simantics.district.region.ontology;
   2
   3 import org.simantics.db.RequestProcessor;
   4 import org.simantics.db.Resource;
   5 import org.simantics.db.ReadGraph;
   6 import org.simantics.db.request.Read;
   7 import org.simantics.db.Session;
   8 import org.simantics.db.exception.DatabaseException;
   9 import org.simantics.db.service.QueryControl;
  10
  11 public class DiagramRegionsResource {
  12
  13     public final Resource Region;
  14     public final Resource Region_area;
  15     public final Resource Region_area_Inverse;
  16     public final Resource hasRegion;
  17     public final Resource regionOf;
  18
  19     public static class URIs {
  20         public static final String Region = "http://www.simantics.org/DistrictDiagramRegions-1.0/Region";
  21         public static final String Region_area = "http://www.simantics.org/DistrictDiagramRegions-1.0/Region/area";
  22         public static final String Region_area_Inverse = "http://www.simantics.org/DistrictDiagramRegions-1.0/Region/area/Inverse";
  23         public static final String hasRegion = "http://www.simantics.org/DistrictDiagramRegions-1.0/hasRegion";
  24         public static final String regionOf = "http://www.simantics.org/DistrictDiagramRegions-1.0/regionOf";
  25     }
  26
  27     public static Resource getResourceOrNull(ReadGraph graph, String uri) {
  28         try {
  29             return graph.getResource(uri);
  30         } catch(DatabaseException e) {
  31             System.err.println(e.getMessage());
  32             return null;
  33         }
  34     }
  35
  36     public DiagramRegionsResource(ReadGraph graph) {
  37         Region = getResourceOrNull(graph, URIs.Region);
  38         Region_area = getResourceOrNull(graph, URIs.Region_area);
  39         Region_area_Inverse = getResourceOrNull(graph, URIs.Region_area_Inverse);
  40         hasRegion = getResourceOrNull(graph, URIs.hasRegion);
  41         regionOf = getResourceOrNull(graph, URIs.regionOf);
  42     }
  43
  44     public static DiagramRegionsResource getInstance(ReadGraph graph) {
  45         Session session = graph.getSession();
  46         DiagramRegionsResource ret = session.peekService(DiagramRegionsResource.class);
  47         if(ret == null) {
  48             QueryControl qc = graph.getService(QueryControl.class);
  49             ret = new DiagramRegionsResource(qc.getIndependentGraph(graph));
  50             session.registerService(DiagramRegionsResource.class, ret);
  51         }
  52         return ret;
  53     }
  54
  55     public static DiagramRegionsResource getInstance(RequestProcessor session) throws DatabaseException {
  56         DiagramRegionsResource ret = session.peekService(DiagramRegionsResource.class);
  57         if(ret == null) {
  58             ret = session.syncRequest(new Read<DiagramRegionsResource>() {
  59                 public DiagramRegionsResource perform(ReadGraph graph) throws DatabaseException {
  60                     QueryControl qc = graph.getService(QueryControl.class);
  61                     return new DiagramRegionsResource(qc.getIndependentGraph(graph));
  62                 }
  63             });
  64             session.registerService(DiagramRegionsResource.class, ret);
  65         }
  66         return ret;
  67     }
  68
  69 }
  70