bundles/org.simantics.diagram/src/org/simantics/diagram/adapter/EdgeRequest.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 org.simantics.db.AsyncReadGraph;
  15 import org.simantics.db.common.procedure.adapter.ListenerSupport;
  16 import org.simantics.db.common.procedure.adapter.TransientCacheAsyncListener;
  17 import org.simantics.db.procedure.AsyncProcedure;
  18 import org.simantics.diagram.content.EdgeResource;
  19 import org.simantics.diagram.internal.DebugPolicy;
  20 import org.simantics.diagram.stubs.DiagramResource;
  21 import org.simantics.diagram.synchronization.ErrorHandler;
  22 import org.simantics.g2d.canvas.ICanvasContext;
  23 import org.simantics.g2d.diagram.IDiagram;
  24 import org.simantics.g2d.element.ElementClass;
  25 import org.simantics.g2d.element.ElementHints;
  26 import org.simantics.g2d.element.IElement;
  27 import org.simantics.g2d.element.impl.Element;
  28
  29 /**
  30  * @author Antti Villberg
  31  */
  32 public class EdgeRequest extends BaseRequest2<EdgeResource, IElement> {
  33
  34     final GraphToDiagramSynchronizer synchronizer;
  35     final ErrorHandler errorHandler;
  36     final ListenerSupport listenerSupport;
  37     final IDiagram diagram;
  38     final ConnectionSegmentAdapter adapter;
  39
  40     public EdgeRequest(GraphToDiagramSynchronizer synchronizer, ICanvasContext canvas, ErrorHandler errorHandler, ListenerSupport listenerSupport, IDiagram diagram, ConnectionSegmentAdapter adapter, EdgeResource resource) {
  41         super(canvas, resource);
  42
  43         assert(adapter != null);
  44         assert(synchronizer != null);
  45
  46         this.synchronizer = synchronizer;
  47         this.errorHandler = errorHandler;
  48         this.listenerSupport = listenerSupport;
  49         this.diagram = diagram;
  50         this.adapter = adapter;
  51     }
  52
  53     @Override
  54     public void perform(AsyncReadGraph graph, final AsyncProcedure<IElement> procedure) {
  55 //        final ITask task = ThreadLogger.getInstance().begin("NodeRequest2 " + data.getResourceId());
  56         final DiagramResource dr = graph.getService(DiagramResource.class);
  57
  58         graph.forHasStatement(data.first(), new AsyncProcedure<Boolean>() {
  59
  60             @Override
  61             public void exception(AsyncReadGraph graph, Throwable throwable) {
  62                 procedure.exception(graph, throwable);
  63             }
  64
  65             @Override
  66             public void execute(AsyncReadGraph graph, Boolean result) {
  67                 if (!result) {
  68                     procedure.execute(graph, null);
  69                     return;
  70                 }
  71
  72                 graph.asyncRequest(new ConnectionInfoRequest(dr, data), new TransientCacheAsyncListener<ConnectionInfo>() {
  73
  74                     @Override
  75                     public void exception(AsyncReadGraph graph, Throwable throwable) {
  76                         errorHandler.error("ConnectionInfoRequest failure", throwable);
  77                     }
  78
  79                     @Override
  80                     public void execute(AsyncReadGraph graph, final ConnectionInfo info) {
  81                         adapter.getClass(graph, data, info, listenerSupport, canvas, diagram, new AsyncProcedure<ElementClass>() {
  82                             @Override
  83                             public void exception(AsyncReadGraph graph, Throwable throwable) {
  84                                 errorHandler.error("ConnectionSegmentAdapter(" + adapter + ").getClass failure", throwable);
  85                             }
  86
  87                             @Override
  88                             public void execute(AsyncReadGraph graph, final ElementClass clazz) {
  89                                 if (clazz == null) {
  90                                     procedure.execute(graph, null);
  91                                     return;
  92                                 }
  93
  94 //                                final ITask task = ThreadLogger.getInstance().begin("SpawnEdge");
  95                                 graph.asyncRequest(new SpawnEdgeRequest(canvas, clazz, data), new AsyncProcedure<IElement>() {
  96                                     @Override
  97                                     public void exception(AsyncReadGraph graph, Throwable throwable) {
  98                                         errorHandler.error("SpawnEdgeRequest failure", throwable);
  99                                     }
 100
 101                                     @Override
 102                                     public void execute(AsyncReadGraph graph, IElement element) {
 103
 104                                         if (DebugPolicy.DEBUG_EDGE_LOAD)
 105                                             System.out.println("    SPAWNED EDGE SEGMENT: " + element + " " + data);
 106
 107                                         // Register this for updates to work correctly
 108                                         synchronizer.mapElementIfNew(data, element);
 109
 110 //                                        task.finish();
 111                                         // Tell the procedure to use this element
 112                                         procedure.execute(graph, element);
 113
 114                                         // Create a separate element for
 115                                         // loading the edge which
 116                                         // will then be updated into
 117                                         // element by the listener in
 118                                         // the connection segment adapter.
 119                                         IElement loadingElement = Element.spawnNew(clazz);
 120                                         loadingElement.setHint(ElementHints.KEY_OBJECT, data);
 121
 122                                         adapter.load(graph, data, info, listenerSupport, canvas, diagram, loadingElement);
 123                                     }
 124                                 });
 125                             }
 126                         });
 127                     }
 128                 });
 129             }
 130         });
 131     }
 132
 133 }