bundles/org.simantics.diagram/src/org/simantics/diagram/adapter/ConnectionRequest2.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 java.util.List;
  15
  16 import org.simantics.db.AsyncReadGraph;
  17 import org.simantics.db.Resource;
  18 import org.simantics.db.common.primitiverequest.Adapter;
  19 import org.simantics.db.common.procedure.adapter.TransientCacheAsyncListener;
  20 import org.simantics.db.procedure.AsyncProcedure;
  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.diagram.handler.SubstituteElementClass;
  25 import org.simantics.g2d.element.ElementClass;
  26 import org.simantics.g2d.element.IElement;
  27 import org.simantics.scl.runtime.tuple.Tuple3;
  28
  29 /**
  30  * @author Antti Villberg
  31  */
  32 public class ConnectionRequest2 extends BaseRequest2<Resource, Tuple3> {
  33
  34     final IDiagram diagram;
  35     final ErrorHandler errorHandler;
  36
  37     public ConnectionRequest2(ICanvasContext canvas, IDiagram diagram, Resource resource, ErrorHandler errorHandler) {
  38         super(canvas, resource);
  39         this.diagram = diagram;
  40         this.errorHandler = errorHandler;
  41     }
  42
  43     @Override
  44     public void perform(AsyncReadGraph graph, final AsyncProcedure<Tuple3> procedure) {
  45
  46         graph.forHasStatement(data, new AsyncProcedure<Boolean>() {
  47
  48             @Override
  49             public void exception(AsyncReadGraph graph, Throwable throwable) {
  50                 procedure.exception(graph, throwable);
  51             }
  52
  53             @Override
  54             public void execute(AsyncReadGraph graph, Boolean result) {
  55
  56                 if (!result) {
  57                     procedure.execute(graph, null);
  58                     return;
  59                 }
  60
  61                 graph.asyncRequest(new Adapter<ElementFactory>(data, ElementFactory.class), new TransientCacheAsyncListener<ElementFactory>() {
  62
  63                     @Override
  64                     public void exception(AsyncReadGraph graph, Throwable throwable) {
  65                         errorHandler.error("Unexpected ElementFactory adaption failure", throwable);
  66                         procedure.execute(graph, null);
  67                     }
  68
  69                     @Override
  70                     public void execute(AsyncReadGraph graph, final ElementFactory factory) {
  71
  72                         graph.asyncRequest(new GetElementClassRequest(factory, data, canvas, diagram), new TransientCacheAsyncListener<ElementClass>() {
  73
  74                             @Override
  75                             public void exception(AsyncReadGraph graph, Throwable throwable) {
  76                                 errorHandler.error("Unexpected ElementClass creation failure", throwable);
  77                                 procedure.execute(graph, null);
  78                             }
  79
  80                             @Override
  81                             public void execute(AsyncReadGraph graph, ElementClass mutableClazz) {
  82
  83                                 List<SubstituteElementClass> substitutes = diagram.getDiagramClass().getItemsByClass(SubstituteElementClass.class);
  84                                 for (SubstituteElementClass subs : substitutes) {
  85                                     mutableClazz = subs.substitute(diagram, mutableClazz);
  86                                 }
  87                                 final ElementClass ec = mutableClazz;
  88
  89                                 graph.asyncRequest(new SpawnRequest(canvas, ec, data), new TransientCacheAsyncListener<IElement>() {
  90
  91                                     @Override
  92                                     public void exception(AsyncReadGraph graph, Throwable throwable) {
  93                                         errorHandler.error("Unexpected SpawnRequest failure", throwable);
  94                                         procedure.execute(graph, null);
  95                                     }
  96
  97                                     @Override
  98                                     public void execute(AsyncReadGraph graph, IElement element) {
  99                                         procedure.execute(graph, new Tuple3(element, ec, factory));
 100                                     }
 101                                 });
 102                             }
 103                         });
 104                     }
 105                 });
 106             }
 107         });
 108     }
 109
 110 }