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/* Copyright 2004, 2005, 2006 Acegi Technology Pty Limited
 *
 * 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.acegisecurity.providers.jaas;

import org.acegisecurity.Authentication;

import org.acegisecurity.userdetails.UserDetails;

import java.io.IOException;

import javax.security.auth.callback.Callback;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.UnsupportedCallbackException;


/**
 * The most basic Callbacks to be handled when using a LoginContext from JAAS, are the NameCallback and
 * PasswordCallback. The acegi security framework provides the JaasNameCallbackHandler specifically tailored to
 * handling the NameCallback. 
* * @author Ray Krueger * @version $Id: JaasNameCallbackHandler.java 1496 2006-05-23 13:38:33Z benalex $ * * @see Callback * @see NameCallback */ public class JaasNameCallbackHandler implements JaasAuthenticationCallbackHandler { //~ Methods ======================================================================================================== /** * If the callback passed to the 'handle' method is an instance of NameCallback, the * JaasNameCallbackHandler will call, callback.setName(authentication.getPrincipal().toString()). * * @param callback * @param authentication * * @throws IOException * @throws UnsupportedCallbackException */ public void handle(Callback callback, Authentication authentication) throws IOException, UnsupportedCallbackException { if (callback instanceof NameCallback) { NameCallback ncb = (NameCallback) callback; String username = ""; Object principal = authentication.getPrincipal(); if (principal instanceof UserDetails) { username = ((UserDetails) principal).getUsername(); } else { username = principal.toString(); } ncb.setName(username); } } }




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