org.simantics.proconf.g3d/src/org/simantics/proconf/g3d/base/AppearanceProviderRegistry.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007 VTT Technical Research Centre of Finland and others.\r
   3  * All rights reserved. This program and the accompanying materials\r
   4  * are made available under the terms of the Eclipse Public License v1.0\r
   5  * which accompanies this distribution, and is available at\r
   6  * http://www.eclipse.org/legal/epl-v10.html\r
   7  *\r
   8  * Contributors:\r
   9  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  10  *******************************************************************************/\r
  11 package org.simantics.proconf.g3d.base;\r
  12 \r
  13 import java.util.ArrayList;\r
  14 import java.util.Collection;\r
  15 import java.util.Collections;\r
  16 import java.util.HashMap;\r
  17 import java.util.List;\r
  18 import java.util.Map;\r
  19 \r
  20 import org.eclipse.core.runtime.CoreException;\r
  21 import org.eclipse.core.runtime.IConfigurationElement;\r
  22 import org.eclipse.core.runtime.IExtension;\r
  23 import org.eclipse.core.runtime.IExtensionPoint;\r
  24 import org.eclipse.core.runtime.Platform;\r
  25 import org.eclipse.core.runtime.dynamichelpers.ExtensionTracker;\r
  26 import org.eclipse.core.runtime.dynamichelpers.IExtensionChangeHandler;\r
  27 import org.eclipse.core.runtime.dynamichelpers.IExtensionTracker;\r
  28 import org.eclipse.core.runtime.dynamichelpers.IFilter;\r
  29 import org.simantics.db.Resource;\r
  30 import org.simantics.layer0.utils.IEntity;\r
  31 import org.simantics.utils.ui.ErrorLogger;\r
  32 \r
  33 import com.jme.renderer.Renderer;\r
  34 import com.jme.scene.state.RenderState;\r
  35 \r
  36 public class AppearanceProviderRegistry implements IExtensionChangeHandler {\r
  37     private static AppearanceProviderRegistry instance;\r
  38     //public final static String ELEMENT_NAME = "Appearance";\r
  39     public final static String NAMESPACE = "org.simantics.proconf.g3d";\r
  40     public final static String EP_NAME = "appearance";\r
  41     \r
  42     private ExtensionTracker tracker;\r
  43     \r
  44     private List<AppearanceProviderExtension> extensions = new ArrayList<AppearanceProviderExtension>();\r
  45     private Map<Resource,AppearanceProvider> providers;\r
  46     \r
  47     private AppearanceProviderRegistry() {\r
  48         providers = new HashMap<Resource,AppearanceProvider>();\r
  49         \r
  50         tracker = new ExtensionTracker();\r
  51                 \r
  52                 IExtensionPoint ep = Platform.getExtensionRegistry().getExtensionPoint(NAMESPACE,EP_NAME);\r
  53                 loadExtensions(ep.getConfigurationElements());\r
  54                 \r
  55                 IFilter filter = ExtensionTracker.createExtensionPointFilter(ep);\r
  56                 tracker.registerHandler(this, filter);\r
  57     }\r
  58     \r
  59     private void close() {\r
  60                 tracker.close();\r
  61                 tracker = null;\r
  62                 extensions = new ArrayList<AppearanceProviderExtension>();\r
  63         }\r
  64     \r
  65     public static synchronized AppearanceProviderRegistry getInstance() {\r
  66         if (instance==null) instance = new AppearanceProviderRegistry();\r
  67         return instance;\r
  68     }\r
  69     \r
  70     public static synchronized void dispose() {\r
  71                 if (instance != null) {\r
  72                         instance.close();\r
  73                         instance = null;\r
  74                 }       \r
  75         }\r
  76     \r
  77     public synchronized List<AppearanceProviderExtension> getExtensions() {\r
  78                 return Collections.unmodifiableList(extensions);\r
  79         }\r
  80     \r
  81     private synchronized void loadExtensions(IConfigurationElement[] elements) {\r
  82                 for (IConfigurationElement el : elements) {\r
  83                         String id = el.getAttribute("id");\r
  84                         try {\r
  85                                 Object o = el.createExecutableExtension("class");\r
  86                                 AppearanceProviderExtension ext = new AppearanceProviderExtension(id,(AppearanceProvider)o);\r
  87                                 tracker.registerObject(el.getDeclaringExtension(), ext, IExtensionTracker.REF_STRONG);\r
  88                                 extensions.add(ext);\r
  89                         } catch (CoreException e) {\r
  90                                 ErrorLogger.defaultLogError("Cannot create java interface for GeometryProvider " + id, e);\r
  91                         }\r
  92                 }\r
  93         }\r
  94     \r
  95     private Map<Resource,AppearanceProvider> getProviderMap() {\r
  96         return providers;\r
  97     }\r
  98     \r
  99     public static Collection<RenderState> getAppearance(IEntity thing, Renderer renderer) {\r
 100         AppearanceProvider provider = getAppearanceProvider(thing);\r
 101         return provider.getAppearanceFromResource(thing, renderer);\r
 102     }\r
 103     \r
 104     public static AppearanceProvider getAppearanceProvider(IEntity thing) {\r
 105         Collection<IEntity> types = thing.getRelatedObjects(thing.getGraph().getBuiltins().InstanceOf);\r
 106         \r
 107         //Resource types[] = OntologyUtils.getTypes(resource);\r
 108         for (IEntity t : types) {\r
 109                 AppearanceProvider provider = getInstance().getProviderMap().get(t.getResource());\r
 110                 if (provider == null) {\r
 111                 //for (Extension<GeometryProvider> e : getInstance().getExtensions()) {\r
 112                         for (AppearanceProviderExtension e : getInstance().getExtensions()) {\r
 113                     if (e.provider.canHandle(thing)) {\r
 114                         getInstance().getProviderMap().put(t.getResource(), e.provider);\r
 115                         return e.provider;\r
 116                     }\r
 117                 }\r
 118                 \r
 119             } else {\r
 120                 return provider;\r
 121             }\r
 122         }\r
 123         \r
 124         return null;\r
 125     }\r
 126     \r
 127     @Override\r
 128     public void addExtension(IExtensionTracker tracker, IExtension extension) {\r
 129         loadExtensions(extension.getConfigurationElements());\r
 130     }\r
 131     \r
 132     @Override\r
 133         public synchronized void removeExtension(IExtension extension, Object[] objects) {\r
 134                 for (Object o : objects) {\r
 135                         AppearanceProviderExtension ext = (AppearanceProviderExtension) o;\r
 136                         tracker.unregisterObject(extension, ext);\r
 137                         extensions.remove(ext);\r
 138                 }\r
 139         }\r
 140     \r
 141     public class AppearanceProviderExtension {\r
 142                 public String id;\r
 143                 public AppearanceProvider provider;\r
 144                 \r
 145                 public AppearanceProviderExtension(String id, AppearanceProvider provider) {\r
 146                         this.id = id;\r
 147                         this.provider = provider;\r
 148                 }\r
 149         }\r
 150 }\r