| /******************************************************************************* |
| * Copyright (c) 2000, 2008 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.core.internal.adapter; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| import org.eclipse.core.internal.runtime.AdapterManager; |
| import org.eclipse.core.internal.runtime.IAdapterManagerProvider; |
| import org.eclipse.core.runtime.*; |
| |
| /** |
| * Portions of the AdapterManager that deal with the Eclipse extension registry |
| * were moved into this class. |
| */ |
| public final class AdapterManagerListener implements IRegistryEventListener, IAdapterManagerProvider { |
| public static final String ADAPTER_POINT_ID = "org.eclipse.core.runtime.adapters"; //$NON-NLS-1$ |
| |
| private AdapterManager theAdapterManager; |
| |
| /** |
| * Constructs a new adapter manager. |
| */ |
| public AdapterManagerListener() { |
| theAdapterManager = AdapterManager.getDefault(); |
| theAdapterManager.registerLazyFactoryProvider(this); |
| } |
| |
| /** |
| * Loads adapters registered with the adapters extension point from |
| * the plug-in registry. Note that the actual factory implementations |
| * are loaded lazily as they are needed. |
| */ |
| public boolean addFactories(AdapterManager adapterManager) { |
| IExtensionPoint point = RegistryFactory.getRegistry().getExtensionPoint(ADAPTER_POINT_ID); |
| if (point == null) |
| return false; |
| |
| boolean factoriesAdded = false; |
| IExtension[] extensions = point.getExtensions(); |
| for (int i = 0; i < extensions.length; i++) { |
| IConfigurationElement[] elements = extensions[i].getConfigurationElements(); |
| for (int j = 0; j < elements.length; j++) { |
| AdapterFactoryProxy proxy = AdapterFactoryProxy.createProxy(elements[j]); |
| if (proxy != null) { |
| adapterManager.registerFactory(proxy, proxy.getAdaptableType()); |
| factoriesAdded = true; |
| } |
| } |
| } |
| RegistryFactory.getRegistry().addListener(this, ADAPTER_POINT_ID); |
| return factoriesAdded; |
| } |
| |
| private void registerExtension(IExtension extension) { |
| IConfigurationElement[] elements = extension.getConfigurationElements(); |
| for (int j = 0; j < elements.length; j++) { |
| AdapterFactoryProxy proxy = AdapterFactoryProxy.createProxy(elements[j]); |
| if (proxy != null) |
| theAdapterManager.registerFactory(proxy, proxy.getAdaptableType()); |
| } |
| } |
| |
| public synchronized void added(IExtension[] extensions) { |
| for (int i = 0; i < extensions.length; i++) |
| registerExtension(extensions[i]); |
| theAdapterManager.flushLookup(); |
| } |
| |
| public synchronized void removed(IExtension[] extensions) { |
| theAdapterManager.flushLookup(); |
| for (int i = 0; i < extensions.length; i++) { |
| for (Iterator it = theAdapterManager.getFactories().values().iterator(); it.hasNext();) { |
| for (Iterator it2 = ((List) it.next()).iterator(); it2.hasNext();) { |
| IAdapterFactory factory = (IAdapterFactory) it2.next(); |
| if (!(factory instanceof AdapterFactoryProxy)) |
| continue; |
| if (((AdapterFactoryProxy) factory).originatesFrom(extensions[i])) |
| it2.remove(); |
| } |
| } |
| } |
| } |
| |
| public synchronized void added(IExtensionPoint[] extensionPoints) { |
| // nothing to do |
| } |
| |
| public synchronized void removed(IExtensionPoint[] extensionPoints) { |
| // all extensions should have been removed by this point by #removed(IExtension[] extensions) |
| // nothing to do |
| } |
| |
| /* |
| * Shuts down the listener by removing the registry change listener. Should only be |
| * invoked during platform shutdown. |
| */ |
| public synchronized void stop() { |
| RegistryFactory.getRegistry().removeListener(this); |
| } |
| } |