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 java.util.Map;
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15 import java.util.concurrent.ConcurrentHashMap;
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16 import java.util.concurrent.atomic.AtomicInteger;
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18 import org.simantics.db.AsyncReadGraph;
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19 import org.simantics.db.Resource;
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20 import org.simantics.db.common.procedure.adapter.AsyncMultiProcedureAdapter;
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21 import org.simantics.db.common.procedure.adapter.AsyncProcedureAdapter;
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22 import org.simantics.db.procedure.AsyncProcedure;
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23 import org.simantics.layer0.Layer0;
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24 import org.simantics.operation.Layer0X;
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27 * Asynchronous version of {@link MappedParts}.
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29 * @author Tuukka Lehtonen
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31 public class AsyncMappedParts extends ResourceAsyncRead<Map<Resource, Resource>> {
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33 public AsyncMappedParts(Resource flat) {
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38 public void perform(AsyncReadGraph graph, final AsyncProcedure<Map<Resource, Resource>> procedure) {
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40 final AtomicInteger done = new AtomicInteger(1);
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41 final Layer0 l0 = graph.getService(Layer0.class);
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42 final Layer0X L0X = graph.getService(Layer0X.class);
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43 final Map<Resource, Resource> result = new ConcurrentHashMap<Resource, Resource>();
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45 graph.forEachObject(resource, l0.ConsistsOf, new AsyncMultiProcedureAdapter<Resource>() {
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47 public void execute(AsyncReadGraph graph, final Resource part) {
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48 done.incrementAndGet();
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49 graph.forPossibleObject(part, L0X.Represents, new AsyncProcedureAdapter<Resource>() {
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51 public void execute(AsyncReadGraph graph, Resource represents) {
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52 if (represents != null)
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53 result.put(represents, part);
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54 if(done.decrementAndGet() == 0) {
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55 procedure.execute(graph, result);
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61 public void exception(AsyncReadGraph graph, Throwable t) {
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62 procedure.exception(graph, t);
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65 public void finished(AsyncReadGraph graph) {
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66 if(done.decrementAndGet() == 0) {
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67 procedure.execute(graph, result);
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