bundles/org.simantics.diagram/src/org/simantics/diagram/content/ConnectionPartRequest.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.diagram.content;
  13
  14 import java.util.HashSet;
  15 import java.util.concurrent.ConcurrentLinkedQueue;
  16 import java.util.concurrent.atomic.AtomicInteger;
  17
  18 import org.simantics.db.AsyncReadGraph;
  19 import org.simantics.db.Resource;
  20 import org.simantics.db.common.request.ResourceAsyncRead;
  21 import org.simantics.db.procedure.AsyncMultiProcedure;
  22 import org.simantics.db.procedure.AsyncProcedure;
  23 import org.simantics.diagram.stubs.DiagramResource;
  24 import org.simantics.diagram.synchronization.ErrorHandler;
  25
  26 /**
  27  * @author Antti Villberg
  28  * @author Tuukka Lehtonen
  29  */
  30 public class ConnectionPartRequest extends ResourceAsyncRead<ConnectionPartData> {
  31
  32     final ErrorHandler    errorHandler;
  33
  34     final DiagramResource dr;
  35
  36     public ConnectionPartRequest(ErrorHandler errorHandler, DiagramResource dr, Resource resource) {
  37         super(resource);
  38         this.errorHandler = errorHandler;
  39         this.dr = dr;
  40     }
  41
  42     @Override
  43     public void perform(AsyncReadGraph graph, final AsyncProcedure<ConnectionPartData> procedure) {
  44
  45         final AtomicInteger ready = new AtomicInteger(3);
  46         final ConnectionPartData result = new ConnectionPartData();
  47         final HashSet<EdgeResource> connectorEdges = new HashSet<EdgeResource>();
  48         final HashSet<EdgeResource> branchEdges = new HashSet<EdgeResource>();
  49
  50         result.edges = connectorEdges;
  51         result.branchPoints = new ConcurrentLinkedQueue<Resource>();
  52
  53         AsyncMultiProcedure<Resource> locationProcedure = new AsyncMultiProcedure<Resource>() {
  54
  55             @Override
  56             public void exception(AsyncReadGraph graph, Throwable throwable) {
  57                 errorHandler.error("forEachObject(connection, Has I/O) failure", throwable);
  58             }
  59
  60             @Override
  61             public void execute(AsyncReadGraph graph, final Resource location) {
  62
  63                 ready.incrementAndGet();
  64
  65                 graph.forEachObject(location, dr.AreConnected, new AsyncMultiProcedure<Resource>() {
  66
  67                     @Override
  68                     public void exception(AsyncReadGraph graph, Throwable throwable) {
  69                         errorHandler.error("forEachObject(:I/O Connector, Are Connected) failure", throwable);
  70                     }
  71
  72                     @Override
  73                     public void execute(AsyncReadGraph graph, Resource connectedTo) {
  74                         synchronized (connectorEdges) {
  75                             connectorEdges.add(new EdgeResource(location, connectedTo));
  76                         }
  77                     }
  78
  79                     @Override
  80                     public void finished(AsyncReadGraph graph) {
  81                         if (ready.decrementAndGet() == 0) {
  82                             connectorEdges.addAll(branchEdges);
  83                             procedure.execute(graph, result);
  84                         }
  85                     }
  86
  87                 });
  88
  89             }
  90
  91             @Override
  92             public void finished(AsyncReadGraph graph) {
  93                 if (ready.decrementAndGet() == 0) {
  94                     connectorEdges.addAll(branchEdges);
  95                     procedure.execute(graph, result);
  96                 }
  97             }
  98
  99         };
 100
 101         AsyncMultiProcedure<Resource> locationProcedure2 = new AsyncMultiProcedure<Resource>() {
 102
 103             @Override
 104             public void exception(AsyncReadGraph graph, Throwable throwable) {
 105                 errorHandler.error("forEachObject(connection, Has Branch Point) failure", throwable);
 106             }
 107
 108             @Override
 109             public void execute(AsyncReadGraph graph, final Resource location) {
 110
 111                 ready.incrementAndGet();
 112
 113                 result.branchPoints.add(location);
 114
 115                 graph.forEachObject(location, dr.AreConnected, new AsyncMultiProcedure<Resource>() {
 116
 117                     @Override
 118                     public void exception(AsyncReadGraph graph, Throwable throwable) {
 119                         errorHandler.error("forEachObject(:Branch Point, Are Connected) failure", throwable);
 120                     }
 121
 122                     @Override
 123                     public void execute(AsyncReadGraph graph, Resource connectedTo) {
 124                         synchronized (branchEdges) {
 125                             branchEdges.add(new EdgeResource(location, connectedTo));
 126                         }
 127                     }
 128
 129                     @Override
 130                     public void finished(AsyncReadGraph graph) {
 131                         if (ready.decrementAndGet() == 0) {
 132                             connectorEdges.addAll(branchEdges);
 133                             procedure.execute(graph, result);
 134                         }
 135                     }
 136
 137                 });
 138
 139             }
 140
 141             @Override
 142             public void finished(AsyncReadGraph graph) {
 143                 if (ready.decrementAndGet() == 0) {
 144                     connectorEdges.addAll(branchEdges);
 145                     procedure.execute(graph, result);
 146                 }
 147             }
 148
 149         };
 150
 151         AsyncMultiProcedure<Resource> locationProcedure3 = new AsyncMultiProcedure<Resource>() {
 152
 153             @Override
 154             public void exception(AsyncReadGraph graph, Throwable throwable) {
 155                 errorHandler.error("forEachObject(connection, Has I/O) failure", throwable);
 156             }
 157
 158             @Override
 159             public void execute(AsyncReadGraph graph, final Resource location) {
 160
 161                 ready.incrementAndGet();
 162
 163                 graph.forEachObject(location, dr.AreConnected, new AsyncMultiProcedure<Resource>() {
 164
 165                     @Override
 166                     public void exception(AsyncReadGraph graph, Throwable throwable) {
 167                         errorHandler.error("forEachObject(:I/O Connector, Are Connected) failure", throwable);
 168                     }
 169
 170                     @Override
 171                     public void execute(AsyncReadGraph graph, Resource connectedTo) {
 172                         synchronized (connectorEdges) {
 173                             connectorEdges.add(new EdgeResource(connectedTo, location));
 174                         }
 175                     }
 176
 177                     @Override
 178                     public void finished(AsyncReadGraph graph) {
 179                         if (ready.decrementAndGet() == 0) {
 180                             connectorEdges.addAll(branchEdges);
 181                             procedure.execute(graph, result);
 182                         }
 183                     }
 184
 185                 });
 186
 187             }
 188
 189             @Override
 190             public void finished(AsyncReadGraph graph) {
 191                 if (ready.decrementAndGet() == 0) {
 192                     connectorEdges.addAll(branchEdges);
 193                     procedure.execute(graph, result);
 194                 }
 195             }
 196
 197         };
 198
 199         graph.forEachObject(resource, dr.HasPlainConnector, locationProcedure);
 200         graph.forEachObject(resource, dr.HasBranchPoint, locationProcedure2);
 201         graph.forEachObject(resource, dr.HasArrowConnector, locationProcedure3);
 202
 203     }
 204
 205 }