| /******************************************************************************* |
| * Copyright (c) 2005, 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.equinox.internal.security.auth; |
| |
| import java.util.ArrayList; |
| import javax.security.auth.login.Configuration; |
| import org.eclipse.core.runtime.*; |
| import org.eclipse.equinox.internal.security.auth.nls.SecAuthMessages; |
| import org.eclipse.osgi.util.NLS; |
| |
| // TODO is this class expected to read extension registry only once? |
| // consider caching/dynamic registry. This should implement registry listener |
| // and react to registry events. |
| |
| // TODO this class creates ConfigurationProvider's from the registry information |
| // consider moving it into loader package and renaming to reflect this. (This is not |
| // a factory in the general meaning of the pattern.) |
| public class ConfigurationFactory { |
| |
| final private static String ELEM_PROVIDER = "loginConfigurationProvider";//$NON-NLS-1$ |
| final private static String ATTR_PROVIDER_CLASS = "class";//$NON-NLS-1$ |
| final private static String POINT_PROVIDER = "org.eclipse.equinox.security.loginConfigurationProvider"; //$NON-NLS-1$ |
| |
| private static ConfigurationFactory s_instance = new ConfigurationFactory(); |
| |
| static ConfigurationFactory getInstance() { |
| return s_instance; |
| } |
| |
| public Configuration[] getConfigurations() { |
| IExtensionRegistry registry = RegistryFactory.getRegistry(); |
| IExtensionPoint point = registry.getExtensionPoint(POINT_PROVIDER); |
| IExtension[] extensions = point.getExtensions(); |
| |
| ArrayList returnValue = new ArrayList(extensions.length); |
| for (int i = 0; i < extensions.length; i++) { |
| IConfigurationElement[] elements = extensions[i].getConfigurationElements(); |
| for (int j = 0; j < elements.length; j++) { |
| Configuration provider = readProvider(elements[j]); |
| if (provider != null) |
| returnValue.add(provider); |
| } |
| } |
| return (Configuration[]) returnValue.toArray(new Configuration[] {}); |
| } |
| |
| private Configuration readProvider(IConfigurationElement element) { |
| if (!ELEM_PROVIDER.equals(element.getName())) { |
| reportError(SecAuthMessages.unexpectedConfigElement, element.getName(), element, null); |
| return null; |
| } |
| try { |
| return (Configuration) element.createExecutableExtension(ATTR_PROVIDER_CLASS); |
| } catch (CoreException e) { |
| reportError(SecAuthMessages.instantiationFailed, element.getAttribute(ATTR_PROVIDER_CLASS), element, e); |
| return null; |
| } |
| } |
| |
| private void reportError(String template, String arg, IConfigurationElement element, Throwable e) { |
| String supplier = element.getContributor().getName(); |
| String message = NLS.bind(template, arg, supplier); |
| AuthPlugin.getDefault().logError(message, e); |
| } |
| } |