bundles/org.simantics.db.common/src/org/simantics/db/common/request/MappedPartsAsync.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   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
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.db.common.request;
  13
  14 import java.util.HashMap;
  15 import java.util.Map;
  16
  17 import org.simantics.db.AsyncReadGraph;
  18 import org.simantics.db.Resource;
  19 import org.simantics.db.common.ProcedureBarrier;
  20 import org.simantics.db.procedure.AsyncMultiProcedure;
  21 import org.simantics.db.procedure.AsyncProcedure;
  22 import org.simantics.layer0.Layer0;
  23 import org.simantics.operation.Layer0X;
  24
  25 public class MappedPartsAsync extends ResourceAsyncRead<Map<Resource, Resource>> {
  26
  27     public MappedPartsAsync(Resource realization) {
  28         super(realization);
  29     }
  30
  31     @Override
  32     public void perform(AsyncReadGraph graph, final AsyncProcedure<Map<Resource, Resource>> procedure) {
  33
  34         final Layer0 L0 = graph.getService(Layer0.class);
  35         final Layer0X L0X = graph.getService(Layer0X.class);
  36         final HashMap<Resource, Resource> result = new HashMap<Resource, Resource>();
  37         final ProcedureBarrier<Map<Resource, Resource>> ready = new ProcedureBarrier<Map<Resource, Resource>>(1);
  38
  39         graph.forEachObject(resource, L0.ConsistsOf, new AsyncMultiProcedure<Resource>() {
  40
  41                         @Override
  42                         public void execute(AsyncReadGraph graph, final Resource object) {
  43
  44                                 ready.incrementAndGet();
  45
  46                                 graph.forEachObject(object, L0X.Represents, new AsyncMultiProcedure<Resource>() {
  47
  48                                         @Override
  49                                         public void execute(AsyncReadGraph graph, Resource mapped) {
  50
  51                                                 synchronized(result) {
  52                                                         result.put(mapped, object);
  53                                                 }
  54
  55                                         }
  56
  57                                         @Override
  58                                         public void finished(AsyncReadGraph graph) {
  59
  60                                                 ready.dec(graph, procedure, result);
  61
  62                                         }
  63
  64                                         @Override
  65                                         public void exception(AsyncReadGraph graph, Throwable throwable) {
  66
  67                                                 ready.except(throwable);
  68                                                 ready.dec(graph, procedure, result);
  69
  70                                         }
  71
  72                                 });
  73
  74                         }
  75
  76                         @Override
  77                         public void finished(AsyncReadGraph graph) {
  78
  79                                 ready.dec(graph, procedure, result);
  80
  81                         }
  82
  83                         @Override
  84                         public void exception(AsyncReadGraph graph, Throwable throwable) {
  85
  86                                 ready.except(throwable);
  87                                 ready.dec(graph, procedure, result);
  88
  89                         }
  90
  91         });
  92
  93     }
  94
  95 //    @Override
  96 //    public Map<Resource, Resource> perform(ReadGraph graph) throws DatabaseException {
  97 //
  98 //        Builtins b = graph.getBuiltins();
  99 //        Map<Resource, Resource> result = new HashMap<Resource, Resource>();
 100 //
 101 //        for(Resource part : graph.syncRequest(new ObjectsWithType(resource, b.ConsistsOf, resource2))) {
 102 //              Resource represents = graph.getPossibleObject(part, b.Represents);
 103 //              if(represents != null) result.put(represents, part);
 104 //        }
 105 //
 106 //        return result;
 107 //
 108 //    }
 109
 110 }