| /******************************************************************************* |
| * 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.converter; |
| |
| 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.pagedesigner.IJMTConstants; |
| import org.eclipse.jst.pagedesigner.PDPlugin; |
| import org.eclipse.jst.pagedesigner.PageDesignerTraceOptions; |
| |
| /** |
| * @author mengbo |
| * @version 1.5 |
| */ |
| public class ConverterFacRegistryReader { |
| private static List<IConverterFactory> _handlers = null; |
| |
| /** |
| * @return the list of handlers. The list is not modifiable and will |
| * throw exceptions if it is attempted. |
| */ |
| public static synchronized List<IConverterFactory> getAllHandlers() { |
| if (_handlers == null) { |
| _handlers = readAllHandlers(); |
| } |
| return Collections.unmodifiableList(_handlers); |
| |
| } |
| |
| private static List<IConverterFactory> readAllHandlers() |
| { |
| final List<IConverterFactory> result = new ArrayList<IConverterFactory>(); |
| 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[] tagConverter = ext |
| .getConfigurationElements(); |
| |
| for (int j = 0; j < tagConverter.length; j++) |
| { |
| final IConfigurationElement element = tagConverter[j]; |
| |
| if (element.getName().equals( |
| IJMTConstants.TAG_CONVERTER_FACTORY)) |
| { |
| element.getAttribute("class"); //$NON-NLS-1$ |
| Object obj; |
| try |
| { |
| obj = element.createExecutableExtension("class"); //$NON-NLS-1$ |
| |
| if (element.getContributor().getName().startsWith( |
| "org.eclipse.jst")) //$NON-NLS-1$ |
| { |
| if (PageDesignerTraceOptions.TRACE_CONVERTERLOAD) |
| { |
| PageDesignerTraceOptions.log("ConverterFacRegistryReader: Appending to list:"+obj.getClass().getName()); //$NON-NLS-1$ |
| } |
| // push JSF tools provided ones to the end |
| result.add((IConverterFactory) obj); |
| } |
| // prepend if something outside JSF tools declared it |
| else |
| { |
| if (PageDesignerTraceOptions.TRACE_CONVERTERLOAD) |
| { |
| PageDesignerTraceOptions.log("ConverterFacRegistryReader: Prepending to list:"+obj.getClass().getName()); //$NON-NLS-1$ |
| } |
| // this way, adopters can put their overrides |
| // of factories with built-in support like |
| // JSF HTML/CORE will be used first |
| result.add(0, (IConverterFactory) obj); |
| } |
| |
| } |
| catch (CoreException e) |
| { |
| PDPlugin.log("Problem loading tag converter extension for "+element.toString(), e); //$NON-NLS-1$ |
| } |
| } |
| } |
| } |
| |
| if (PageDesignerTraceOptions.TRACE_CONVERTERLOAD) |
| { |
| PageDesignerTraceOptions.log("\nFinal converterFactory list in order:"); //$NON-NLS-1$ |
| for (final IConverterFactory factory : result) |
| { |
| PageDesignerTraceOptions.log(factory.getClass().getName()); |
| } |
| PageDesignerTraceOptions.log("\n"); //$NON-NLS-1$ |
| } |
| return result; |
| } |
| |
| } |