+/*******************************************************************************\r
+ * Copyright (c) 2007 VTT Technical Research Centre of Finland and others.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.proconf.g3d.base;\r
+\r
+import java.util.ArrayList;\r
+import java.util.Collection;\r
+import java.util.Collections;\r
+import java.util.HashMap;\r
+import java.util.List;\r
+import java.util.Map;\r
+\r
+import org.eclipse.core.runtime.CoreException;\r
+import org.eclipse.core.runtime.IConfigurationElement;\r
+import org.eclipse.core.runtime.IExtension;\r
+import org.eclipse.core.runtime.IExtensionPoint;\r
+import org.eclipse.core.runtime.Platform;\r
+import org.eclipse.core.runtime.dynamichelpers.ExtensionTracker;\r
+import org.eclipse.core.runtime.dynamichelpers.IExtensionChangeHandler;\r
+import org.eclipse.core.runtime.dynamichelpers.IExtensionTracker;\r
+import org.eclipse.core.runtime.dynamichelpers.IFilter;\r
+import org.simantics.db.Resource;\r
+import org.simantics.layer0.utils.IEntity;\r
+import org.simantics.utils.ui.ErrorLogger;\r
+\r
+import com.jme.renderer.Renderer;\r
+import com.jme.scene.state.RenderState;\r
+\r
+public class AppearanceProviderRegistry implements IExtensionChangeHandler {\r
+ private static AppearanceProviderRegistry instance;\r
+ //public final static String ELEMENT_NAME = "Appearance";\r
+ public final static String NAMESPACE = "org.simantics.proconf.g3d";\r
+ public final static String EP_NAME = "appearance";\r
+ \r
+ private ExtensionTracker tracker;\r
+ \r
+ private List<AppearanceProviderExtension> extensions = new ArrayList<AppearanceProviderExtension>();\r
+ private Map<Resource,AppearanceProvider> providers;\r
+ \r
+ private AppearanceProviderRegistry() {\r
+ providers = new HashMap<Resource,AppearanceProvider>();\r
+ \r
+ tracker = new ExtensionTracker();\r
+ \r
+ IExtensionPoint ep = Platform.getExtensionRegistry().getExtensionPoint(NAMESPACE,EP_NAME);\r
+ loadExtensions(ep.getConfigurationElements());\r
+ \r
+ IFilter filter = ExtensionTracker.createExtensionPointFilter(ep);\r
+ tracker.registerHandler(this, filter);\r
+ }\r
+ \r
+ private void close() {\r
+ tracker.close();\r
+ tracker = null;\r
+ extensions = new ArrayList<AppearanceProviderExtension>();\r
+ }\r
+ \r
+ public static synchronized AppearanceProviderRegistry getInstance() {\r
+ if (instance==null) instance = new AppearanceProviderRegistry();\r
+ return instance;\r
+ }\r
+ \r
+ public static synchronized void dispose() {\r
+ if (instance != null) {\r
+ instance.close();\r
+ instance = null;\r
+ } \r
+ }\r
+ \r
+ public synchronized List<AppearanceProviderExtension> getExtensions() {\r
+ return Collections.unmodifiableList(extensions);\r
+ }\r
+ \r
+ private synchronized void loadExtensions(IConfigurationElement[] elements) {\r
+ for (IConfigurationElement el : elements) {\r
+ String id = el.getAttribute("id");\r
+ try {\r
+ Object o = el.createExecutableExtension("class");\r
+ AppearanceProviderExtension ext = new AppearanceProviderExtension(id,(AppearanceProvider)o);\r
+ tracker.registerObject(el.getDeclaringExtension(), ext, IExtensionTracker.REF_STRONG);\r
+ extensions.add(ext);\r
+ } catch (CoreException e) {\r
+ ErrorLogger.defaultLogError("Cannot create java interface for GeometryProvider " + id, e);\r
+ }\r
+ }\r
+ }\r
+ \r
+ private Map<Resource,AppearanceProvider> getProviderMap() {\r
+ return providers;\r
+ }\r
+ \r
+ public static Collection<RenderState> getAppearance(IEntity thing, Renderer renderer) {\r
+ AppearanceProvider provider = getAppearanceProvider(thing);\r
+ return provider.getAppearanceFromResource(thing, renderer);\r
+ }\r
+ \r
+ public static AppearanceProvider getAppearanceProvider(IEntity thing) {\r
+ Collection<IEntity> types = thing.getRelatedObjects(thing.getGraph().getBuiltins().InstanceOf);\r
+ \r
+ //Resource types[] = OntologyUtils.getTypes(resource);\r
+ for (IEntity t : types) {\r
+ AppearanceProvider provider = getInstance().getProviderMap().get(t.getResource());\r
+ if (provider == null) {\r
+ //for (Extension<GeometryProvider> e : getInstance().getExtensions()) {\r
+ for (AppearanceProviderExtension e : getInstance().getExtensions()) {\r
+ if (e.provider.canHandle(thing)) {\r
+ getInstance().getProviderMap().put(t.getResource(), e.provider);\r
+ return e.provider;\r
+ }\r
+ }\r
+ \r
+ } else {\r
+ return provider;\r
+ }\r
+ }\r
+ \r
+ return null;\r
+ }\r
+ \r
+ @Override\r
+ public void addExtension(IExtensionTracker tracker, IExtension extension) {\r
+ loadExtensions(extension.getConfigurationElements());\r
+ }\r
+ \r
+ @Override\r
+ public synchronized void removeExtension(IExtension extension, Object[] objects) {\r
+ for (Object o : objects) {\r
+ AppearanceProviderExtension ext = (AppearanceProviderExtension) o;\r
+ tracker.unregisterObject(extension, ext);\r
+ extensions.remove(ext);\r
+ }\r
+ }\r
+ \r
+ public class AppearanceProviderExtension {\r
+ public String id;\r
+ public AppearanceProvider provider;\r
+ \r
+ public AppearanceProviderExtension(String id, AppearanceProvider provider) {\r
+ this.id = id;\r
+ this.provider = provider;\r
+ }\r
+ }\r
+}\r