bundles/org.simantics.structural2/src/org/simantics/structural2/scl/FindPossibleComponentTypeRequest.java

   1 package org.simantics.structural2.scl;
   2
   3 import org.simantics.db.ReadGraph;
   4 import org.simantics.db.Resource;
   5 import org.simantics.db.common.request.ResourceRead;
   6 import org.simantics.db.exception.DatabaseException;
   7 import org.simantics.layer0.Layer0;
   8 import org.simantics.structural.stubs.StructuralResource2;
   9
  10 public class FindPossibleComponentTypeRequest extends ResourceRead<Resource> {
  11
  12         public FindPossibleComponentTypeRequest(Resource resource) {
  13                 super(resource);
  14         }
  15
  16         @Override
  17         public Resource perform(ReadGraph graph) throws DatabaseException {
  18                 StructuralResource2 STR = StructuralResource2.getInstance(graph);
  19                 Resource type = graph.getPossibleObject(resource, STR.Defines);
  20                 if(type != null)
  21                         return type;
  22
  23                 Layer0 L0 = Layer0.getInstance(graph);
  24                 Resource parent = graph.getPossibleObject(resource, L0.PartOf);
  25                 if(parent != null && graph.isInstanceOf(parent, STR.Composite))
  26                         return graph.syncRequest(new FindPossibleComponentTypeRequest(parent));
  27                 else
  28                         return null;
  29         }
  30
  31 }