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.browsing.ui.graph.tester;
14 import java.util.Collection;
16 import org.simantics.browsing.ui.NodeContext;
17 import org.simantics.browsing.ui.NodeQueryManager;
18 import org.simantics.browsing.ui.Tester;
19 import org.simantics.browsing.ui.graph.impl.CommonKeys;
20 import org.simantics.db.ReadGraph;
21 import org.simantics.db.RequestProcessor;
22 import org.simantics.db.Resource;
23 import org.simantics.db.common.request.ReadRequest;
24 import org.simantics.db.exception.DatabaseException;
25 import org.simantics.utils.Container;
28 * @author Tuukka Lehtonen
30 public class HasRelatedObjectsTester implements Tester {
32 private Resource relation;
34 public HasRelatedObjectsTester(Resource relation) {
35 this.relation = relation;
38 public HasRelatedObjectsTester(RequestProcessor processor, final String relationUri) throws DatabaseException {
39 processor.syncRequest(new ReadRequest() {
41 public void run(ReadGraph graph) throws DatabaseException {
42 relation = graph.getResource(relationUri);
48 public boolean test(NodeQueryManager manager, NodeContext context) {
49 Container<Collection<Resource>> objects = manager.query(context, new CommonKeys.RelatedObjectsKey(relation));
50 return !objects.get().isEmpty();