| /******************************************************************************* |
| * 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.actions.link; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| 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; |
| |
| /** |
| * @author mengbo |
| * @version 1.5 |
| */ |
| public class ExtensionReader { |
| private static Logger _log = PDPlugin.getLogger(ExtensionReader.class); |
| |
| private static List<ILinkCreator> _handlers = null; |
| |
| private static final String ATTR_CLASS = "class"; //$NON-NLS-1$ |
| |
| /** |
| * @return the ext-pts for the link handler |
| * List is not modifiable |
| */ |
| public static synchronized List<ILinkCreator> getAllLinkHandlers() { |
| if (_handlers == null) { |
| _handlers = readAllLinkHandlers(); |
| } |
| return Collections.unmodifiableList(_handlers); |
| |
| } |
| |
| private static List<ILinkCreator> readAllLinkHandlers() { |
| List<ILinkCreator> result = new ArrayList<ILinkCreator>(); |
| 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[] linkHandlers = ext |
| .getConfigurationElements(); |
| |
| for (int j = 0; j < linkHandlers.length; j++) { |
| if (linkHandlers[j].getName() |
| .equals(IJMTConstants.LINK_CREATOR)) { |
| linkHandlers[j].getAttribute(ATTR_CLASS); |
| Object obj; |
| try { |
| obj = linkHandlers[j] |
| .createExecutableExtension(ATTR_CLASS); |
| |
| if (obj instanceof ILinkCreator) { |
| result.add((ILinkCreator)obj); |
| } |
| } catch (CoreException e) { |
| _log |
| .error("Log.Error.ExtensionReader.ReadLinkExtension"); //$NON-NLS-1$ |
| } |
| } |
| } |
| } |
| return result; |
| } |
| } |