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.Resource;
16 import org.simantics.db.exception.DatabaseException;
17 import org.simantics.db.procedure.AsyncProcedure;
18 import org.simantics.layer0.Layer0;
20 public class TypedParent extends ResourceAsyncRead2<Resource> {
22 public TypedParent(Resource resource, Resource type) {
23 super(resource, type);
27 public void perform(AsyncReadGraph graph, final AsyncProcedure<Resource> procedure) {
29 final Layer0 l0 = graph.getService(Layer0.class);
31 graph.forIsInstanceOf(resource, resource2, new AsyncProcedure<Boolean>() {
34 public void execute(AsyncReadGraph graph, Boolean isInstance) {
36 procedure.execute(graph, resource);
38 graph.forPossibleObject(resource, l0.PartOf, new AsyncProcedure<Resource>() {
41 public void execute(AsyncReadGraph graph, final Resource parent) {
44 procedure.exception(graph, new DatabaseException("Typed parent was not found."));
46 graph.asyncRequest(new TypedParent(parent, resource2), procedure);
52 public void exception(AsyncReadGraph graph, Throwable throwable) {
53 procedure.exception(graph, throwable);
61 public void exception(AsyncReadGraph graph, Throwable throwable) {
62 procedure.exception(graph, throwable);