1 /*******************************************************************************
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2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.browsing.ui.graph.tester;
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14 import java.util.Collection;
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16 import org.simantics.browsing.ui.NodeContext;
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17 import org.simantics.browsing.ui.NodeQueryManager;
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18 import org.simantics.browsing.ui.Tester;
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19 import org.simantics.browsing.ui.graph.impl.CommonKeys;
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20 import org.simantics.db.ReadGraph;
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21 import org.simantics.db.RequestProcessor;
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22 import org.simantics.db.Resource;
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23 import org.simantics.db.common.request.ReadRequest;
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24 import org.simantics.db.exception.DatabaseException;
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25 import org.simantics.utils.Container;
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28 * @author Tuukka Lehtonen
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30 public class HasRelatedObjectsTester implements Tester {
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32 private Resource relation;
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34 public HasRelatedObjectsTester(Resource relation) {
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35 this.relation = relation;
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38 public HasRelatedObjectsTester(RequestProcessor processor, final String relationUri) throws DatabaseException {
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39 processor.syncRequest(new ReadRequest() {
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41 public void run(ReadGraph graph) throws DatabaseException {
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42 relation = graph.getResource(relationUri);
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48 public boolean test(NodeQueryManager manager, NodeContext context) {
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49 Container<Collection<Resource>> objects = manager.query(context, new CommonKeys.RelatedObjectsKey(relation));
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50 return !objects.get().isEmpty();
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