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