bundles/org.simantics.diagram/src/org/simantics/diagram/adapter/NodeClassRequest.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.Resource;
  16 import org.simantics.db.procedure.AsyncProcedure;
  17 import org.simantics.g2d.canvas.ICanvasContext;
  18 import org.simantics.g2d.diagram.IDiagram;
  19 import org.simantics.g2d.element.ElementClass;
  20
  21 public class NodeClassRequest extends BaseRequest2<Resource, ElementClass> {
  22
  23     private final IDiagram diagram;
  24     private final boolean exceptionOnAdaptionFailure;
  25
  26     public NodeClassRequest(ICanvasContext canvas, IDiagram diagram, Resource resource) {
  27         this(canvas, diagram, resource, false);
  28     }
  29
  30     public NodeClassRequest(ICanvasContext canvas, IDiagram diagram, Resource resource, boolean exceptionOnAdaptionFailure) {
  31         super(canvas, resource);
  32         this.diagram = diagram;
  33         this.exceptionOnAdaptionFailure = exceptionOnAdaptionFailure;
  34     }
  35
  36     @Override
  37     public void perform(AsyncReadGraph graph, final AsyncProcedure<ElementClass> procedure) {
  38
  39         graph.forAdapted(data, ElementFactory.class, new AsyncProcedure<ElementFactory>() {
  40
  41             @Override
  42             public void exception(AsyncReadGraph graph, Throwable throwable) {
  43                 if (exceptionOnAdaptionFailure)
  44                     procedure.exception(graph, throwable);
  45                 else
  46                     procedure.execute(graph, null);
  47             }
  48
  49             @Override
  50             public void execute(AsyncReadGraph graph, final ElementFactory factory) {
  51
  52                 if (factory == null) {
  53                     // Should never happen since we are using forAdapted
  54                     System.out.println("No factory in NodeClassRequest! " + this);
  55                     procedure.execute(graph, null);
  56                     return;
  57                 }
  58
  59                 factory.create(graph, canvas, diagram, data, new AsyncProcedure<ElementClass>() {
  60
  61                     @Override
  62                     public void exception(AsyncReadGraph graph, Throwable throwable) {
  63                         procedure.exception(graph, throwable);
  64                     }
  65
  66                     @Override
  67                     public void execute(AsyncReadGraph graph, ElementClass ec) {
  68 //                        System.out.println("Produced element class " + ec);
  69                         procedure.execute(graph, ec);
  70                     }
  71
  72                 });
  73
  74             }
  75
  76         });
  77
  78     }
  79
  80 }