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

   1 package org.simantics.db.layer0.request;\r
   2 \r
   3 import java.util.Collection;\r
   4 \r
   5 import org.simantics.db.ReadGraph;\r
   6 import org.simantics.db.Resource;\r
   7 import org.simantics.db.common.request.ResourceRead;\r
   8 import org.simantics.db.exception.DatabaseException;\r
   9 import org.simantics.db.layer0.variable.Variable;\r
  10 \r
  11 public class PossibleActiveRun extends ResourceRead<Variable> {\r
  12 \r
  13     public PossibleActiveRun(Resource model) {\r
  14         super(model);\r
  15     }\r
  16 \r
  17     public PossibleActiveRun(ReadGraph graph, Variable model) throws DatabaseException {\r
  18         super(model.getRepresents(graph));\r
  19     }\r
  20 \r
  21     @Override\r
  22     public Variable perform(ReadGraph graph) throws DatabaseException {\r
  23 \r
  24         Collection<Variable> result = graph.sync(new ActiveRuns(resource));\r
  25         if(result.size() == 1) return result.iterator().next();\r
  26         else return null;\r
  27 \r
  28     }\r
  29 \r
  30 }\r