1 /*******************************************************************************
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2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.diagram.adapter;
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14 import org.simantics.db.AsyncReadGraph;
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15 import org.simantics.db.Resource;
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16 import org.simantics.db.common.primitiverequest.Adapter;
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17 import org.simantics.db.common.procedure.adapter.TransientCacheAsyncListener;
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18 import org.simantics.db.procedure.AsyncProcedure;
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19 import org.simantics.db.procedure.Listener;
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20 import org.simantics.diagram.synchronization.ErrorHandler;
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21 import org.simantics.g2d.canvas.ICanvasContext;
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22 import org.simantics.g2d.diagram.IDiagram;
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23 import org.simantics.g2d.element.ElementClass;
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24 import org.simantics.g2d.element.IElement;
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27 * @author Antti Villberg
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29 public class ConnectionRequest extends BaseRequest2<Resource, IElement> {
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31 final IDiagram diagram;
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32 final Listener<IElement> loadListener;
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33 final ErrorHandler errorHandler;
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35 public ConnectionRequest(ICanvasContext canvas, IDiagram diagram, Resource resource, ErrorHandler errorHandler, Listener<IElement> loadListener) {
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36 super(canvas, resource);
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37 this.diagram = diagram;
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38 this.errorHandler = errorHandler;
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39 this.loadListener = loadListener;
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43 public void perform(AsyncReadGraph graph, final AsyncProcedure<IElement> procedure) {
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45 graph.forHasStatement(data, new AsyncProcedure<Boolean>() {
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48 public void exception(AsyncReadGraph graph, Throwable throwable) {
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49 procedure.exception(graph, throwable);
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53 public void execute(AsyncReadGraph graph, Boolean result) {
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56 procedure.execute(graph, null);
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60 graph.asyncRequest(new Adapter<ElementFactory>(data, ElementFactory.class), new TransientCacheAsyncListener<ElementFactory>() {
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63 public void exception(AsyncReadGraph graph, Throwable throwable) {
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64 errorHandler.error("Unexpected ElementFactory adaption failure", throwable);
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65 procedure.execute(graph, null);
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69 public void execute(AsyncReadGraph graph, final ElementFactory factory) {
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71 graph.asyncRequest(new GetElementClassRequest(factory, data, canvas, diagram), new TransientCacheAsyncListener<ElementClass>() {
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74 public void exception(AsyncReadGraph graph, Throwable throwable) {
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75 errorHandler.error("Unexpected ElementClass creation failure", throwable);
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76 procedure.execute(graph, null);
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80 public void execute(AsyncReadGraph graph, final ElementClass ec) {
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82 graph.asyncRequest(new SpawnRequest(canvas, ec, data), new TransientCacheAsyncListener<IElement>() {
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85 public void exception(AsyncReadGraph graph, Throwable throwable) {
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86 errorHandler.error("Unexpected SpawnRequest failure", throwable);
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87 procedure.execute(graph, null);
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91 public void execute(AsyncReadGraph graph, IElement element) {
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93 procedure.execute(graph, element);
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95 if (loadListener != null) {
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96 //System.out.println("LoadRequest[" + (loadCounter++) + "] for " + data + ": " + element);
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97 graph.asyncRequest(new LoadRequest(canvas, diagram, factory, ec, data), loadListener);
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99 //System.out.println("Spawn[" + (spawnCounter++) + "] for " + data + ": " + element);
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100 factory.load(graph, canvas, diagram, data, element, new AsyncProcedure<IElement>() {
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102 public void exception(AsyncReadGraph graph, Throwable throwable) {
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103 errorHandler.error("Unexpected ElementFactory.load failure", throwable);
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106 public void execute(AsyncReadGraph graph, IElement result) {
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107 // Loading complete, don't care.
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