/* 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.cas.proxy;

 import org.acegisecurity.AcegiMessageSource;

 import org.acegisecurity.providers.cas.CasProxyDecider;

 import org.acegisecurity.providers.cas.ProxyUntrustedException;

 import org.apache.commons.logging.Log;

 import org.apache.commons.logging.LogFactory;

 import org.springframework.beans.factory.InitializingBean;

 import org.springframework.context.MessageSource;

 import org.springframework.context.MessageSourceAware;

 import org.springframework.context.support.MessageSourceAccessor;

 import org.springframework.util.Assert;

 import java.util.List;

 /**

  * Accepts proxied requests if the closest proxy is named in the <code>validProxies</code> list.<P>Also accepts the

  * request if there was no proxy (ie the user directly authenticated against this service).</p>

  */

 public class NamedCasProxyDecider implements CasProxyDecider, InitializingBean, MessageSourceAware {

     //~ Static fields/initializers =====================================================================================

     private static final Log logger = LogFactory.getLog(NamedCasProxyDecider.class);

     //~ Instance fields ================================================================================================

     private List validProxies;

     protected MessageSourceAccessor messages = AcegiMessageSource.getAccessor();

     //~ Methods ========================================================================================================

     public void afterPropertiesSet() throws Exception {

         Assert.notNull(this.validProxies, "A validProxies list must be set");

         Assert.notNull(this.messages, "A message source must be set");

     }

     public void confirmProxyListTrusted(List proxyList)

         throws ProxyUntrustedException {

         Assert.notNull(proxyList, "proxyList cannot be null");

         if (logger.isDebugEnabled()) {

             logger.debug("Proxy list: " + proxyList.toString());

         }

         if (proxyList.size() == 0) {

             // A Service Ticket (not a Proxy Ticket)

             return;

         }

         if (!validProxies.contains(proxyList.get(0))) {

             throw new ProxyUntrustedException(messages.getMessage("NamedCasProxyDecider.untrusted",

                     new Object[] {proxyList.get(0)}, "Nearest proxy {0} is untrusted"));

         }

     }

     public List getValidProxies() {

         return validProxies;

     }

     public void setMessageSource(MessageSource messageSource) {

         this.messages = new MessageSourceAccessor(messageSource);

     }

     public void setValidProxies(List validProxies) {

         this.validProxies = validProxies;

     }

 }