/*

  * Copyright 2004-2011 the Seasar Foundation and the Others.

  *

  * 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 javax.faces.internal;

 import java.util.ArrayList;

 import java.util.Iterator;

 import java.util.List;

 import org.seasar.framework.message.MessageResourceBundle;

 import org.seasar.framework.util.AssertionUtil;

 /**

  * @author shot

  */

 public class MessageResourceBundleChain implements MessageResourceBundle {

     private List bundles = new ArrayList();

     public String get(String key) {

         for (Iterator itr = bundles.iterator(); itr.hasNext();) {

             MessageResourceBundle bundle = (MessageResourceBundle) itr.next();

             String str = bundle.get(key);

             if (str != null) {

                 return str;

             }

         }

         return null;

     }

     public MessageResourceBundle getParent() {

         throw new UnsupportedOperationException();

     }

     public void setParent(MessageResourceBundle parent) {

         throw new UnsupportedOperationException();

     }

     public void addMessageResourceBundle(

             MessageResourceBundle messageResourceBundle) {

         AssertionUtil.assertNotNull("messageResourceBundle",

                 messageResourceBundle);

         bundles.add(messageResourceBundle);

     }

 }