1 /*******************************************************************************
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2 * Copyright (c) 2007 VTT Technical Research Centre of Finland and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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9 * VTT Technical Research Centre of Finland - initial API and implementation
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10 *******************************************************************************/
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11 package org.simantics.proconf.g3d.base;
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13 import java.util.ArrayList;
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14 import java.util.Collection;
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15 import java.util.Collections;
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16 import java.util.HashMap;
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17 import java.util.List;
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18 import java.util.Map;
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20 import org.eclipse.core.runtime.CoreException;
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21 import org.eclipse.core.runtime.IConfigurationElement;
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22 import org.eclipse.core.runtime.IExtension;
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23 import org.eclipse.core.runtime.IExtensionPoint;
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24 import org.eclipse.core.runtime.Platform;
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25 import org.eclipse.core.runtime.dynamichelpers.ExtensionTracker;
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26 import org.eclipse.core.runtime.dynamichelpers.IExtensionChangeHandler;
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27 import org.eclipse.core.runtime.dynamichelpers.IExtensionTracker;
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28 import org.eclipse.core.runtime.dynamichelpers.IFilter;
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29 import org.simantics.db.Resource;
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30 import org.simantics.layer0.utils.IEntity;
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31 import org.simantics.utils.ui.ErrorLogger;
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33 import com.jme.scene.Geometry;
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35 public class GeometryProviderRegistry implements IExtensionChangeHandler {
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36 private static GeometryProviderRegistry instance;
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37 public final static String ELEMENT_NAME = "Geometry";
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38 public final static String NAMESPACE = "org.simantics.proconf.g3d";
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39 public final static String EP_NAME = "geometry";
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41 private ExtensionTracker tracker;
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43 private List<GeometryProviderExtension> extensions = new ArrayList<GeometryProviderExtension>();
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44 private Map<Resource,GeometryProvider> providers;
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46 private GeometryProviderRegistry() {
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47 providers = new HashMap<Resource,GeometryProvider>();
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49 tracker = new ExtensionTracker();
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51 IExtensionPoint ep = Platform.getExtensionRegistry().getExtensionPoint(NAMESPACE,EP_NAME);
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52 loadExtensions(ep.getConfigurationElements());
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54 IFilter filter = ExtensionTracker.createExtensionPointFilter(ep);
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55 tracker.registerHandler(this, filter);
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58 private void close() {
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61 extensions = new ArrayList<GeometryProviderExtension>();
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64 public static synchronized GeometryProviderRegistry getInstance() {
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65 if (instance==null) instance = new GeometryProviderRegistry();
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69 public static synchronized void dispose() {
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70 if (instance != null) {
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76 public synchronized List<GeometryProviderExtension> getExtensions() {
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77 return Collections.unmodifiableList(extensions);
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80 private synchronized void loadExtensions(IConfigurationElement[] elements) {
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81 for (IConfigurationElement el : elements) {
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82 String id = el.getAttribute("id");
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84 Object o = el.createExecutableExtension("class");
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85 GeometryProviderExtension ext = new GeometryProviderExtension(id,(GeometryProvider)o);
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86 tracker.registerObject(el.getDeclaringExtension(), ext, IExtensionTracker.REF_STRONG);
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87 extensions.add(ext);
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88 } catch (CoreException e) {
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89 ErrorLogger.defaultLogError("Cannot create java interface for GeometryProvider " + id, e);
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94 private Map<Resource,GeometryProvider> getProviderMap() {
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98 public static Geometry[] getGeometry(IEntity thing, boolean transform) {
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99 GeometryProvider provider = getGeometryProvider(thing);
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100 return provider.getGeometryFromResource(thing, transform);
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103 public static GeometryProvider getGeometryProvider(IEntity thing) {
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104 Collection<IEntity> types = thing.getRelatedObjects(thing.getGraph().getBuiltins().InstanceOf);
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106 //Resource types[] = OntologyUtils.getTypes(resource);
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107 for (IEntity t : types) {
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108 GeometryProvider provider = getInstance().getProviderMap().get(t.getResource());
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109 if (provider == null) {
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110 //for (Extension<GeometryProvider> e : getInstance().getExtensions()) {
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111 for (GeometryProviderExtension e : getInstance().getExtensions()) {
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112 if (e.provider.canHandle(thing)) {
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113 getInstance().getProviderMap().put(t.getResource(), e.provider);
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123 throw new UnsupportedOperationException("Cannot handle resource " + thing);
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127 public void addExtension(IExtensionTracker tracker, IExtension extension) {
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128 loadExtensions(extension.getConfigurationElements());
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132 public synchronized void removeExtension(IExtension extension, Object[] objects) {
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133 for (Object o : objects) {
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134 GeometryProviderExtension ext = (GeometryProviderExtension) o;
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135 tracker.unregisterObject(extension, ext);
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136 extensions.remove(ext);
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140 public class GeometryProviderExtension {
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142 public GeometryProvider provider;
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144 public GeometryProviderExtension(String id, GeometryProvider provider) {
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146 this.provider = provider;
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