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

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