bundles/org.simantics.structural2/src/org/simantics/structural2/queries/PossibleConnectionPointInfo.java

   1 package org.simantics.structural2.queries;
   2
   3 import org.simantics.db.ReadGraph;
   4 import org.simantics.db.Resource;
   5 import org.simantics.db.common.primitiverequest.IsSubrelationOf;
   6 import org.simantics.db.common.procedure.adapter.TransientCacheAsyncListener;
   7 import org.simantics.db.common.request.ResourceRead;
   8 import org.simantics.db.exception.DatabaseException;
   9 import org.simantics.db.layer0.request.PropertyInfo;
  10 import org.simantics.db.layer0.request.PropertyInfoRequest;
  11 import org.simantics.structural.stubs.StructuralResource2;
  12
  13 public class PossibleConnectionPointInfo extends ResourceRead<PropertyInfo> {
  14
  15         public PossibleConnectionPointInfo(Resource resource) {
  16                 super(resource);
  17         }
  18
  19         @Override
  20         public PropertyInfo perform(ReadGraph graph) throws DatabaseException {
  21
  22                 PropertyInfo info = graph.syncRequest(new PropertyInfoRequest(resource), TransientCacheAsyncListener.<PropertyInfo>instance());
  23                 if(info != null && !info.isHasProperty) {
  24                         StructuralResource2 STR = StructuralResource2.getInstance(graph);
  25                         if(graph.syncRequest(new IsSubrelationOf(resource, STR.IsConnectedTo), TransientCacheAsyncListener.<Boolean>instance())) {
  26                                 if (info.name != null) return info;
  27                         }
  28                 }
  29                 return null;
  30
  31         }
  32
  33 }