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 java.util.HashMap;
17 import org.simantics.db.ReadGraph;
18 import org.simantics.db.Resource;
19 import org.simantics.db.exception.DatabaseException;
20 import org.simantics.layer0.Layer0;
21 import org.simantics.operation.Layer0X;
24 * Given an input resource that consists of resources representing other
25 * resources, return a map: represented resource -> representing resource.
27 * @author Antti Villberg
29 public class MappedParts extends ResourceRead<Map<Resource, Resource>> {
31 public MappedParts(Resource flat) {
36 public Map<Resource, Resource> perform(ReadGraph graph) throws DatabaseException {
38 Layer0 l0 = Layer0.getInstance(graph);
39 Layer0X L0X = Layer0X.getInstance(graph);
40 Map<Resource, Resource> result = new HashMap<Resource, Resource>();
42 for (Resource part : graph.getObjects(resource, l0.ConsistsOf)) {
43 Resource represents = graph.getPossibleObject(part, L0X.Represents);
44 if (represents != null)
45 result.put(represents, part);