1 /*******************************************************************************
2 * Copyright (c) 2007, 2018 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.layer0.request;
14 import org.simantics.datatypes.literal.GUID;
15 import org.simantics.db.ReadGraph;
16 import org.simantics.db.Resource;
17 import org.simantics.db.common.request.ResourceRead;
18 import org.simantics.db.exception.DatabaseException;
19 import org.simantics.layer0.Layer0;
21 public class PossibleGUID extends ResourceRead<String> {
23 public PossibleGUID(Resource resource) {
28 public String perform(ReadGraph graph) throws DatabaseException {
29 Layer0 L0 = Layer0.getInstance(graph);
30 GUID guid = graph.getPossibleRelatedValue(resource, L0.identifier, GUID.BINDING);
31 return guid != null ? guid.indexString() : null;