bundles/org.simantics.diagram/src/org/simantics/diagram/adapter/DiagramContentRequest.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.adapter;
  13
  14 import gnu.trove.list.array.TIntArrayList;
  15 import gnu.trove.map.hash.THashMap;
  16 import gnu.trove.procedure.TIntProcedure;
  17 import gnu.trove.set.hash.THashSet;
  18
  19 import java.util.ArrayList;
  20 import java.util.Set;
  21 import java.util.concurrent.atomic.AtomicInteger;
  22
  23 import org.simantics.db.AsyncReadGraph;
  24 import org.simantics.db.ReadGraph;
  25 import org.simantics.db.Resource;
  26 import org.simantics.db.common.procedure.adapter.ProcedureAdapter;
  27 import org.simantics.db.exception.DatabaseException;
  28 import org.simantics.db.procedure.AsyncMultiProcedure;
  29 import org.simantics.db.procedure.AsyncProcedure;
  30 import org.simantics.diagram.content.ConnectionPartData;
  31 import org.simantics.diagram.content.ConnectionPartRequest;
  32 import org.simantics.diagram.content.DiagramContents;
  33 import org.simantics.diagram.content.EdgeResource;
  34 import org.simantics.diagram.content.RouteGraphConnectionPartData;
  35 import org.simantics.diagram.content.RouteGraphConnectionPartRequest;
  36 import org.simantics.diagram.stubs.DiagramResource;
  37 import org.simantics.diagram.synchronization.ErrorHandler;
  38 import org.simantics.g2d.canvas.ICanvasContext;
  39
  40 /**
  41  * @author Tuukka Lehtonen
  42  */
  43 public class DiagramContentRequest extends BaseRequest<Resource, DiagramContents> {
  44
  45     int previousElementCount = 32;
  46     ErrorHandler errorHandler;
  47
  48     public DiagramContentRequest(ICanvasContext canvas, Resource resource, ErrorHandler errorHandler) {
  49         super(canvas, resource);
  50         this.errorHandler = errorHandler;
  51     }
  52
  53     @Override
  54     public DiagramContents perform(ReadGraph g) throws DatabaseException {
  55
  56         final DiagramResource DIA = DiagramResource.getInstance(g);
  57         final DiagramContents result = new DiagramContents();
  58
  59         result.elements =   new ArrayList<Resource>(previousElementCount);
  60         result.nodeSet = new THashSet<Resource>();
  61         result.connectionSet = new THashSet<Resource>();
  62         result.connectionSegments = new THashSet<EdgeResource>();
  63         result.branchPoints = new THashSet<Resource>();
  64         result.routeGraphConnectionSet = new THashSet<Resource>();
  65         result.routeLinks = new THashSet<EdgeResource>();
  66         result.routeLines = new THashSet<Resource>();
  67         result.routePoints = new THashSet<Resource>();
  68
  69         result.partToConnection = new THashMap<Object, Resource>();
  70
  71         // These help loading result.elements in the correct order.
  72         final AtomicInteger index = new AtomicInteger();
  73         final TIntArrayList unrecognizedElementIndices = new TIntArrayList();
  74
  75         g.forOrderedSet(data, new AsyncMultiProcedure<Resource>() {
  76
  77             @Override
  78             public void execute(AsyncReadGraph graph, final Resource component) {
  79
  80                 // Must add the elements to the result set here in order to
  81                 // keep their order the same as in the ordered set.
  82                 final int elementIndex = index.getAndIncrement();
  83                 result.elements.add(component);
  84
  85                 graph.forTypes(component, new AsyncProcedure<Set<Resource>>() {
  86
  87                     @Override
  88                     public void exception(AsyncReadGraph graph, Throwable t) {
  89                         if (errorHandler != null)
  90                             errorHandler.error(t.getMessage(), t);
  91                     }
  92
  93                     @Override
  94                     public void execute(AsyncReadGraph graph, Set<Resource> types) {
  95                         if (types.contains(DIA.Connection)) {
  96                             if (types.contains(DIA.RouteGraphConnection)) {
  97                                 graph.asyncRequest(new RouteGraphConnectionPartRequest(errorHandler, DIA, component),
  98                                         new ProcedureAdapter<RouteGraphConnectionPartData>() {
  99                                     @Override
 100                                     public void execute(RouteGraphConnectionPartData partData) {
 101                                         synchronized (result) {
 102                                             for (EdgeResource link : partData.links) {
 103                                                 result.routeLinks.add(link);
 104                                                 result.partToConnection.put(link, component);
 105                                                 result.connectionToParts.add(component, link);
 106                                             }
 107                                             for (Resource line : partData.routeLines) {
 108                                                 result.routeLines.add(line);
 109                                                 result.connectionToParts.add(component, line);
 110                                                 result.partToConnection.put(line, component);
 111                                             }
 112                                             for (Resource point : partData.routePoints) {
 113                                                 result.routePoints.add(point);
 114                                                 result.connectionToParts.add(component, point);
 115                                                 result.partToConnection.put(point, component);
 116                                             }
 117                                         }
 118                                     }
 119                                 });
 120
 121                                 synchronized (result.routeGraphConnectionSet) {
 122                                     result.routeGraphConnectionSet.add(component);
 123                                 }
 124                             } else {
 125                                 graph.asyncRequest(new ConnectionPartRequest(errorHandler, DIA, component),
 126                                         new ProcedureAdapter<ConnectionPartData>() {
 127                                     @Override
 128                                     public void execute(ConnectionPartData partData) {
 129                                         synchronized (result) {
 130                                             for (EdgeResource er : partData.edges) {
 131                                                 result.connectionSegments.add(er);
 132                                                 result.partToConnection.put(er, component);
 133                                                 result.connectionToParts.add(component, er);
 134                                             }
 135                                             for (Resource bp : partData.branchPoints) {
 136                                                 result.branchPoints.add(bp);
 137                                                 result.connectionToParts.add(component, bp);
 138                                                 result.partToConnection.put(bp, component);
 139                                             }
 140                                         }
 141                                     }
 142                                 });
 143
 144                                 synchronized (result.connectionSet) {
 145                                     result.connectionSet.add(component);
 146                                 }
 147                             }
 148                         }
 149                         else if (types.contains(DIA.Element)) {
 150                             synchronized (result.nodeSet) {
 151                                 result.nodeSet.add(component);
 152                             }
 153                         }
 154                         else {
 155                             synchronized (unrecognizedElementIndices) {
 156                                 // Unrecognized element, mark it to be
 157                                 // removed after everything is processed.
 158                                 unrecognizedElementIndices.add(elementIndex);
 159                             }
 160                         }
 161                     }
 162
 163                 });
 164
 165             }
 166
 167             @Override
 168             public void finished(AsyncReadGraph graph) {
 169                 // Remove elements that were not recognized in descending order.
 170                 unrecognizedElementIndices.sort();
 171                 unrecognizedElementIndices.forEachDescending(new TIntProcedure() {
 172                     @Override
 173                     public boolean execute(int index) {
 174                         result.elements.remove(index);
 175                         return true;
 176                     }
 177                 });
 178
 179                 // Help successive request executions by remembering the previous
 180                 // element count. This will relieve some ArrayList reallocation
 181                 // strain down the road.
 182                 previousElementCount = result.elements.size();
 183             }
 184
 185             @Override
 186             public void exception(AsyncReadGraph graph, Throwable t) {
 187                 if (errorHandler != null)
 188                     errorHandler.error(t.getMessage(), t);
 189             }
 190         });
 191
 192         return result;
 193     }
 194 }