bundles/org.simantics.diagram/src/org/simantics/diagram/adapter/ElementFactoryAdapter.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.Resource;\r
  16 import org.simantics.db.common.procedure.adapter.TransientCacheAsyncListener;\r
  17 import org.simantics.db.procedure.AsyncProcedure;\r
  18 import org.simantics.diagram.stubs.DiagramResource;\r
  19 import org.simantics.g2d.canvas.ICanvasContext;\r
  20 import org.simantics.g2d.diagram.IDiagram;\r
  21 import org.simantics.g2d.element.ElementClass;\r
  22 import org.simantics.g2d.element.IElement;\r
  23 \r
  24 /**\r
  25  * @author Tuukka Lehtonen\r
  26  */\r
  27 public class ElementFactoryAdapter implements ElementFactory {\r
  28 \r
  29     @Override\r
  30     public void create(AsyncReadGraph graph, ICanvasContext canvas, IDiagram diagram, Resource elementType,\r
  31             AsyncProcedure<ElementClass> procedure) {\r
  32         procedure.exception(graph, new UnsupportedOperationException(getClass().getName() + " does not support ElementFactory.create"));\r
  33     }\r
  34 \r
  35     protected Resource getElementClassBaseType(AsyncReadGraph graph) {\r
  36         return graph.getService(DiagramResource.class).Element;\r
  37     }\r
  38 \r
  39     @Override\r
  40     public void getClass(AsyncReadGraph graph, final ICanvasContext canvas, final IDiagram diagram,\r
  41             Resource elementResource, final AsyncProcedure<ElementClass> procedure) {\r
  42         // A most usual default implementation.\r
  43         graph.forSingleType(elementResource, getElementClassBaseType(graph), new AsyncProcedure<Resource>() {\r
  44             @Override\r
  45             public void exception(AsyncReadGraph graph, Throwable throwable) {\r
  46                 procedure.exception(graph, throwable);\r
  47             }\r
  48             @Override\r
  49             public void execute(AsyncReadGraph graph, Resource elementType) {\r
  50                 // Implements caching of element class requests.\r
  51                 graph.asyncRequest(new CreateElementClassRequest(ElementFactoryAdapter.this, elementType, canvas, diagram),\r
  52                         new TransientCacheAsyncListener<ElementClass>() {\r
  53                     @Override\r
  54                     public void exception(AsyncReadGraph graph, Throwable t) {\r
  55                         procedure.exception(graph, t);\r
  56                     }\r
  57                     @Override\r
  58                     public void execute(AsyncReadGraph graph, ElementClass result) {\r
  59                         //System.out.println("RESULT ELEMENTCLASS: " + System.identityHashCode(result) + ": " + result);\r
  60                         procedure.execute(graph, result);\r
  61                     }\r
  62                 });\r
  63             }\r
  64         });\r
  65     }\r
  66 \r
  67     @Override\r
  68     public void load(AsyncReadGraph graph, ICanvasContext canvas, IDiagram diagram, Resource elementResource,\r
  69             IElement element, AsyncProcedure<IElement> procedure) {\r
  70         procedure.exception(graph, new UnsupportedOperationException(getClass().getName() + " does not support ElementFactory.load"));\r
  71     }\r
  72 \r
  73 }\r