bundles/org.simantics.diagram/src/org/simantics/diagram/adapter/EdgeRequest.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.diagram.adapter;\r
  13 \r
  14 import org.simantics.db.AsyncReadGraph;\r
  15 import org.simantics.db.common.procedure.adapter.ListenerSupport;\r
  16 import org.simantics.db.common.procedure.adapter.TransientCacheAsyncListener;\r
  17 import org.simantics.db.procedure.AsyncProcedure;\r
  18 import org.simantics.diagram.content.EdgeResource;\r
  19 import org.simantics.diagram.stubs.DiagramResource;\r
  20 import org.simantics.diagram.synchronization.ErrorHandler;\r
  21 import org.simantics.g2d.canvas.ICanvasContext;\r
  22 import org.simantics.g2d.diagram.IDiagram;\r
  23 import org.simantics.g2d.element.ElementClass;\r
  24 import org.simantics.g2d.element.ElementHints;\r
  25 import org.simantics.g2d.element.IElement;\r
  26 import org.simantics.g2d.element.impl.Element;\r
  27 \r
  28 /**\r
  29  * @author Antti Villberg\r
  30  */\r
  31 public class EdgeRequest extends BaseRequest2<EdgeResource, IElement> {\r
  32 \r
  33     final ErrorHandler errorHandler;\r
  34     final ListenerSupport listenerSupport;\r
  35     final IDiagram diagram;\r
  36     final ConnectionSegmentAdapter adapter;\r
  37 \r
  38     public EdgeRequest(ICanvasContext canvas, ErrorHandler errorHandler, ListenerSupport listenerSupport, IDiagram diagram, ConnectionSegmentAdapter adapter, EdgeResource resource) {\r
  39         super(canvas, resource);\r
  40 \r
  41         assert(adapter != null);\r
  42 \r
  43         this.errorHandler = errorHandler;\r
  44         this.listenerSupport = listenerSupport;\r
  45         this.diagram = diagram;\r
  46         this.adapter = adapter;\r
  47     }\r
  48 \r
  49     @Override\r
  50     public void perform(AsyncReadGraph graph, final AsyncProcedure<IElement> procedure) {\r
  51 //        final ITask task = ThreadLogger.getInstance().begin("NodeRequest2 " + data.getResourceId());\r
  52         final DiagramResource dr = graph.getService(DiagramResource.class);\r
  53 \r
  54         graph.forHasStatement(data.first(), new AsyncProcedure<Boolean>() {\r
  55 \r
  56             @Override\r
  57             public void exception(AsyncReadGraph graph, Throwable throwable) {\r
  58                 procedure.exception(graph, throwable);\r
  59             }\r
  60 \r
  61             @Override\r
  62             public void execute(AsyncReadGraph graph, Boolean result) {\r
  63                 if (!result) {\r
  64                     procedure.execute(graph, null);\r
  65                     return;\r
  66                 }\r
  67 \r
  68                 graph.asyncRequest(new ConnectionInfoRequest(dr, data), new TransientCacheAsyncListener<ConnectionInfo>() {\r
  69 \r
  70                     @Override\r
  71                     public void exception(AsyncReadGraph graph, Throwable throwable) {\r
  72                         errorHandler.error("ConnectionInfoRequest failure", throwable);\r
  73                     }\r
  74 \r
  75                     @Override\r
  76                     public void execute(AsyncReadGraph graph, final ConnectionInfo info) {\r
  77                         adapter.getClass(graph, data, info, listenerSupport, canvas, diagram, new AsyncProcedure<ElementClass>() {\r
  78                             @Override\r
  79                             public void exception(AsyncReadGraph graph, Throwable throwable) {\r
  80                                 errorHandler.error("ConnectionSegmentAdapter(" + adapter + ").getClass failure", throwable);\r
  81                             }\r
  82 \r
  83                             @Override\r
  84                             public void execute(AsyncReadGraph graph, final ElementClass clazz) {\r
  85                                 if (clazz == null) {\r
  86                                     procedure.execute(graph, null);\r
  87                                     return;\r
  88                                 }\r
  89 \r
  90 //                                final ITask task = ThreadLogger.getInstance().begin("SpawnEdge");\r
  91                                 graph.asyncRequest(new SpawnEdgeRequest(canvas, clazz, data), new AsyncProcedure<IElement>() {\r
  92                                     @Override\r
  93                                     public void exception(AsyncReadGraph graph, Throwable throwable) {\r
  94                                         errorHandler.error("SpawnEdgeRequest failure", throwable);\r
  95                                     }\r
  96 \r
  97                                     @Override\r
  98                                     public void execute(AsyncReadGraph graph, IElement element) {\r
  99 //                                        task.finish();\r
 100                                         // Tell the procedure to use this element\r
 101                                         procedure.execute(graph, element);\r
 102 \r
 103                                         // Create a separate element for\r
 104                                         // loading the edge which\r
 105                                         // will then be updated into\r
 106                                         // element by the listener in\r
 107                                         // the connection segment adapter.\r
 108                                         IElement loadingElement = Element.spawnNew(clazz);\r
 109                                         loadingElement.setHint(ElementHints.KEY_OBJECT, data);\r
 110 \r
 111                                         adapter.load(graph, data, info, listenerSupport, canvas, diagram, loadingElement);\r
 112                                     }\r
 113                                 });\r
 114                             }\r
 115                         });\r
 116                     }\r
 117                 });\r
 118             }\r
 119         });\r
 120     }\r
 121 \r
 122 }\r