bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/request/LinkedFrom.java

   1 package org.simantics.db.layer0.request;\r
   2 \r
   3 import java.util.Collection;\r
   4 import java.util.HashSet;\r
   5 import java.util.Set;\r
   6 \r
   7 import org.simantics.db.ReadGraph;\r
   8 import org.simantics.db.Resource;\r
   9 import org.simantics.db.common.request.ResourceRead;\r
  10 import org.simantics.db.exception.DatabaseException;\r
  11 import org.simantics.layer0.Layer0;\r
  12 \r
  13 /**\r
  14  * @author Tuukka Lehtonen\r
  15  * @since 1.25.0\r
  16  */\r
  17 public class LinkedFrom extends ResourceRead<Set<Resource>> {\r
  18 \r
  19     public LinkedFrom(Resource resource) {\r
  20         super(resource);\r
  21     }\r
  22 \r
  23     @Override\r
  24     public Set<Resource> perform(ReadGraph graph) throws DatabaseException {\r
  25         Layer0 L0 = Layer0.getInstance(graph);\r
  26         HashSet<Resource> result = new HashSet<>();\r
  27         Collection<Resource> linkees = graph.getObjects(resource, L0.IsLinkedTo_Inverse);\r
  28         result.addAll(linkees);\r
  29         for (Resource linkee : linkees) {\r
  30             Set<Resource> deep = graph.sync(new LinkedFrom(linkee));\r
  31             result.addAll(deep);\r
  32         }\r
  33         return result;\r
  34     }\r
  35 \r
  36 }\r