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