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 org.simantics.db.AsyncReadGraph;
15 import org.simantics.db.ReadGraph;
16 import org.simantics.db.Resource;
17 import org.simantics.db.exception.DatabaseException;
18 import org.simantics.db.procedure.AsyncProcedure;
19 import org.simantics.layer0.Layer0;
21 public class PossibleTypedParent extends ResourceRead2<Resource> {
23 public PossibleTypedParent(Resource resource, Resource type) {
24 super(resource, type);
29 public Resource perform(ReadGraph graph) throws DatabaseException {
30 if(graph.isInstanceOf(resource, resource2)) {
33 Layer0 L0 = Layer0.getInstance(graph);
34 Resource possibleParent = graph.getPossibleObject(resource, L0.PartOf);
35 if(possibleParent != null) {
36 return graph.syncRequest(new PossibleTypedParent(possibleParent, resource2));
44 // public void perform(AsyncReadGraph graph, final AsyncProcedure<Resource> procedure) {
46 // final Layer0 l0 = graph.getService(Layer0.class);
48 // graph.forIsInstanceOf(resource, resource2, new AsyncProcedure<Boolean>() {
51 // public void execute(AsyncReadGraph graph, Boolean isInstance) {
53 // procedure.execute(graph, resource);
56 // graph.forPossibleObject(resource, l0.PartOf, new AsyncProcedure<Resource>() {
59 // public void execute(AsyncReadGraph graph, final Resource parent) {
61 // if(parent == null) {
62 // procedure.execute(graph, null);
64 // graph.asyncRequest(new PossibleTypedParent(parent, resource2), procedure);
70 // public void exception(AsyncReadGraph graph, Throwable throwable) {
71 // procedure.exception(graph, throwable);
80 // public void exception(AsyncReadGraph graph, Throwable throwable) {
81 // procedure.exception(graph, throwable);