001    /* 
002        Licensed to the Apache Software Foundation (ASF) under one
003        or more contributor license agreements.  See the NOTICE file
004        distributed with this work for additional information
005        regarding copyright ownership.  The ASF licenses this file
006        to you under the Apache License, Version 2.0 (the
007        "License"); you may not use this file except in compliance
008        with the License.  You may obtain a copy of the License at
009    
010           http://www.apache.org/licenses/LICENSE-2.0
011    
012        Unless required by applicable law or agreed to in writing,
013        software distributed under the License is distributed on an
014        "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015        KIND, either express or implied.  See the License for the
016        specific language governing permissions and limitations
017        under the License.  
018     */
019    package org.apache.wiki.auth.login;
020    
021    import java.io.IOException;
022    
023    import javax.security.auth.callback.Callback;
024    import javax.security.auth.callback.CallbackHandler;
025    import javax.security.auth.callback.UnsupportedCallbackException;
026    import javax.servlet.http.HttpServletRequest;
027    
028    import org.apache.wiki.WikiEngine;
029    
030    /**
031     * Handles logins made from within JSPWiki.
032     * @see org.apache.wiki.WikiSession#getWikiSession(WikiEngine,HttpServletRequest)
033     * @since 2.3
034     */
035    public final class WebContainerCallbackHandler implements CallbackHandler
036    {
037        private final HttpServletRequest m_request;
038    
039        private final WikiEngine         m_engine;
040    
041        /**
042         *  Create a new handler.
043         *  
044         *  @param engine The WikiEngine
045         *  @param request The request to look into
046         */
047        public WebContainerCallbackHandler( WikiEngine engine, HttpServletRequest request )
048        {
049            m_engine  = engine;
050            m_request = request;
051        }
052    
053        /**
054         * @see javax.security.auth.callback.CallbackHandler#handle(javax.security.auth.callback.Callback[])
055         * 
056         * {@inheritDoc}
057         */
058        public void handle( Callback[] callbacks ) throws IOException, UnsupportedCallbackException
059        {
060            for( int i = 0; i < callbacks.length; i++ )
061            {
062                Callback callback = callbacks[i];
063                if ( callback instanceof HttpRequestCallback )
064                {
065                    ( (HttpRequestCallback) callback ).setRequest( m_request );
066                }
067                else if( callback instanceof WikiEngineCallback )
068                {
069                    ( (WikiEngineCallback) callback ).setEngine( m_engine );
070                }
071                else
072                {
073                    throw new UnsupportedCallbackException( callback );
074                }
075            }
076        }
077    
078    }