bundles/org.simantics.db.common/src/org/simantics/db/common/request/PossibleOwner.java

   1 package org.simantics.db.common.request;\r
   2 \r
   3 import java.util.Collections;\r
   4 \r
   5 import org.simantics.db.ReadGraph;\r
   6 import org.simantics.db.Resource;\r
   7 import org.simantics.db.common.utils.CommonDBUtils;\r
   8 import org.simantics.db.exception.DatabaseException;\r
   9 import org.simantics.layer0.Layer0;\r
  10 \r
  11 public class PossibleOwner extends ResourceRead<Resource> {\r
  12 \r
  13     public PossibleOwner(Resource resource) {\r
  14         super(resource);\r
  15     }\r
  16 \r
  17     @Override\r
  18     public Resource perform(ReadGraph graph) throws DatabaseException {\r
  19         Layer0 L0 = Layer0.getInstance(graph);\r
  20         Resource directOwner = graph.getPossibleObject(resource, L0.IsOwnedBy);\r
  21         if(directOwner != null) return directOwner;\r
  22         return CommonDBUtils.getNearestOwner(graph, Collections.singleton(resource));\r
  23     }\r
  24     \r
  25 }