1 /*******************************************************************************
2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.db.common.request;
14 import org.simantics.db.ReadGraph;
15 import org.simantics.db.Resource;
16 import org.simantics.db.exception.DatabaseException;
17 import org.simantics.layer0.Layer0;
19 final public class PossibleObjectWithName extends TernaryRead<Resource, Resource, String, Resource> {
21 public PossibleObjectWithName(Resource resource, Resource predicate, String name) {
22 super(resource, predicate, name);
26 public Resource perform(ReadGraph graph) throws DatabaseException {
27 Layer0 b = Layer0.getInstance(graph);
28 Resource result = null;
29 for(Resource object : graph.getObjects(parameter, parameter2)) {
30 String name = graph.getPossibleRelatedValue(object, b.HasName);
31 if(parameter3.equals(name)) {
32 if(result != null) return null;