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.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 public class PossibleTypedParent extends ResourceRead2<Resource> {
21 public PossibleTypedParent(Resource resource, Resource type) {
22 super(resource, type);
26 public Resource perform(ReadGraph graph) throws DatabaseException {
27 if (graph.isInstanceOf(resource, resource2)) {
30 Layer0 L0 = Layer0.getInstance(graph);
31 Resource possibleParent = graph.getPossibleObject(resource, L0.PartOf);
32 if (possibleParent != null) {
33 return graph.syncRequest(new PossibleTypedParent(possibleParent, resource2));