ListIndexRoots.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.SingletonRead;
   8 import org.simantics.db.exception.DatabaseException;
   9 import org.simantics.db.layer0.util.Layer0Utils;
  10
  11 /**
  12  * Returns a set of index roots.
  13  *
  14  * @author Antti Villberg
  15  */
  16 public class ListIndexRoots extends SingletonRead<Collection<Resource>> {
  17
  18     public ListIndexRoots() {
  19     }
  20
  21     @Override
  22     public Collection<Resource> perform(ReadGraph graph) throws DatabaseException {
  23         return Layer0Utils.listIndexRoots(graph);
  24     }
  25
  26 }