| /******************************************************************************* |
| * Copyright (c) 2006 Sybase, Inc. 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: |
| * Sybase, Inc. - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jst.pagedesigner.dnd.internal; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.core.runtime.IExtension; |
| import org.eclipse.core.runtime.IExtensionPoint; |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.jst.jsf.common.ui.internal.logging.Logger; |
| import org.eclipse.jst.pagedesigner.IJMTConstants; |
| import org.eclipse.jst.pagedesigner.PDPlugin; |
| import org.eclipse.jst.pagedesigner.dnd.ILocalDropHandler; |
| |
| /** |
| * Read the registry to find out all the LocalDropHandlers. |
| * |
| * @author mengbo |
| */ |
| public class RegistryReader { |
| final private static Logger _log = PDPlugin.getLogger(RegistryReader.class); |
| |
| private static ILocalDropHandler[] _handlers = null; |
| |
| public static synchronized ILocalDropHandler[] getAllHandlers() { |
| if (_handlers == null) { |
| _handlers = readAllHandlers(); |
| } |
| return _handlers; |
| |
| } |
| |
| private static ILocalDropHandler[] readAllHandlers() { |
| List result = new ArrayList(); |
| IExtensionPoint extensionPoint = Platform.getExtensionRegistry() |
| .getExtensionPoint(PDPlugin.getPluginId(), |
| IJMTConstants.EXTENSION_POINT_PAGEDESIGNER); |
| IExtension[] extensions = extensionPoint.getExtensions(); |
| |
| for (int i = 0; i < extensions.length; i++) { |
| IExtension ext = extensions[i]; |
| IConfigurationElement[] dropHandlers = ext |
| .getConfigurationElements(); |
| |
| for (int j = 0; j < dropHandlers.length; j++) { |
| if (dropHandlers[j].getName().equals( |
| IJMTConstants.LOCAL_DROP_HANDLER)) { |
| dropHandlers[j].getAttribute("class"); |
| Object obj; |
| try { |
| obj = dropHandlers[j] |
| .createExecutableExtension("class"); |
| |
| if (obj instanceof ILocalDropHandler) { |
| result.add(obj); |
| } |
| } catch (CoreException e) { |
| _log.info("CoreException", e); |
| } |
| } |
| } |
| } |
| ILocalDropHandler[] ret = new ILocalDropHandler[result.size()]; |
| result.toArray(ret); |
| return ret; |
| } |
| } |