gerrit.simantics Code Review - simantics/district.git/blob

   1 package org.simantics.district.network.ui.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 DistrictNetworkUIResource {
  12
  13     public final Resource NetworkProperties;
  14     public final Resource SelectionTab;
  15     public final Resource SelectionTabContribution;
  16
  17     public static class URIs {
  18         public static final String NetworkProperties = "http://www.simantics.org/DistrictNetworkUI-1.0/NetworkProperties";
  19         public static final String SelectionTab = "http://www.simantics.org/DistrictNetworkUI-1.0/SelectionTab";
  20         public static final String SelectionTabContribution = "http://www.simantics.org/DistrictNetworkUI-1.0/SelectionTabContribution";
  21     }
  22
  23     public static Resource getResourceOrNull(ReadGraph graph, String uri) {
  24         try {
  25             return graph.getResource(uri);
  26         } catch(DatabaseException e) {
  27             System.err.println(e.getMessage());
  28             return null;
  29         }
  30     }
  31
  32     public DistrictNetworkUIResource(ReadGraph graph) {
  33         NetworkProperties = getResourceOrNull(graph, URIs.NetworkProperties);
  34         SelectionTab = getResourceOrNull(graph, URIs.SelectionTab);
  35         SelectionTabContribution = getResourceOrNull(graph, URIs.SelectionTabContribution);
  36     }
  37
  38     public static DistrictNetworkUIResource getInstance(ReadGraph graph) {
  39         Session session = graph.getSession();
  40         DistrictNetworkUIResource ret = session.peekService(DistrictNetworkUIResource.class);
  41         if(ret == null) {
  42             QueryControl qc = graph.getService(QueryControl.class);
  43             ret = new DistrictNetworkUIResource(qc.getIndependentGraph(graph));
  44             session.registerService(DistrictNetworkUIResource.class, ret);
  45         }
  46         return ret;
  47     }
  48
  49     public static DistrictNetworkUIResource getInstance(RequestProcessor session) throws DatabaseException {
  50         DistrictNetworkUIResource ret = session.peekService(DistrictNetworkUIResource.class);
  51         if(ret == null) {
  52             ret = session.syncRequest(new Read<DistrictNetworkUIResource>() {
  53                 public DistrictNetworkUIResource perform(ReadGraph graph) throws DatabaseException {
  54                     QueryControl qc = graph.getService(QueryControl.class);
  55                     return new DistrictNetworkUIResource(qc.getIndependentGraph(graph));
  56                 }
  57             });
  58             session.registerService(DistrictNetworkUIResource.class, ret);
  59         }
  60         return ret;
  61     }
  62
  63 }
  64