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

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