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/*******************************************************************************
* Copyright (c) 2005, 2008 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* 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);
}
}
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