/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.cocoon.webapps.authentication.components;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.cocoon.ProcessingException;
import org.apache.cocoon.components.ChainedConfiguration;
import org.apache.cocoon.components.SitemapConfigurationHolder;
import org.apache.cocoon.environment.ObjectModelHelper;
import org.apache.cocoon.webapps.authentication.configuration.HandlerConfiguration;
/**
* This is a utility class managing the authentication handlers
*
* @author <a href="mailto:cziegeler@apache.org">Carsten Ziegeler</a>
* @version CVS $Id: DefaultHandlerManager.java,v 1.6 2004/03/19 13:59:22 cziegeler Exp $
*/
public final class DefaultHandlerManager {
/**
* Get the current handler configuration
*/
static public Map prepareHandlerConfiguration(Map objectModel,
SitemapConfigurationHolder holder)
throws ConfigurationException {
Map configs = (Map)holder.getPreparedConfiguration();
if ( null == configs ) {
ChainedConfiguration chainedConfig = holder.getConfiguration();
configs = prepare( objectModel, holder, chainedConfig );
}
return configs;
}
/**
* Prepare the handler configuration
*/
static private Map prepare( Map objectModel,
SitemapConfigurationHolder holder,
ChainedConfiguration conf)
throws ConfigurationException {
// test for handlers
boolean found = false;
Configuration[] handlers = null;
Configuration handlersWrapper = conf.getChild("handlers", false);
if ( null != handlersWrapper ) {
handlers = handlersWrapper.getChildren("handler");
if ( null != handlers && handlers.length > 0) {
found = true;
}
}
Map values = null;
final ChainedConfiguration parent = conf.getParent();
if ( null != parent ) {
values = prepare( objectModel, holder, parent );
if ( found ) {
values = new HashMap( values );
}
} else if ( found ){
values = new HashMap(10);
} else {
values = Collections.EMPTY_MAP;
}
if ( found ) {
for(int i=0; i<handlers.length;i++) {
// check unique name
final String name = handlers[i].getAttribute("name");
if ( null != values.get(name) ) {
throw new ConfigurationException("Handler names must be unique: " + name);
}
addHandler( objectModel, handlers[i], values );
}
}
holder.setPreparedConfiguration( conf, values );
return values;
}
/**
* Add one handler configuration
*/
static private void addHandler(Map objectModel,
Configuration configuration,
Map values)
throws ConfigurationException {
// get handler name
final String name = configuration.getAttribute("name");
// create handler
HandlerConfiguration currentHandler = new HandlerConfiguration(name);
try {
currentHandler.configure(ObjectModelHelper.getRequest(objectModel), configuration);
} catch (ProcessingException se) {
throw new ConfigurationException("Exception during configuration of handler: " + name, se);
}
values.put( name, currentHandler );
}
}