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

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.db.common.request;
  13
  14 import java.util.HashSet;
  15 import java.util.Set;
  16
  17 import org.simantics.db.ReadGraph;
  18 import org.simantics.db.Resource;
  19 import org.simantics.db.exception.DatabaseException;
  20
  21 final public class ObjectsWithSupertype extends ResourceRead3<Set<Resource>> {
  22
  23     public ObjectsWithSupertype(Resource subject, Resource subrelationOf, Resource instanceOf) {
  24         super(subject, subrelationOf, instanceOf);
  25     }
  26
  27     @Override
  28     public Set<Resource> perform(ReadGraph graph) throws DatabaseException {
  29
  30         Set<Resource> result = new HashSet<Resource>();
  31         for(Resource object : graph.getObjects(resource, resource2)) {
  32                 if(graph.isInheritedFrom(object, resource3)) result.add(object);
  33         }
  34         return result;
  35
  36     }
  37
  38 }