/*

  * 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 org.seasar.teeda.core.context;

 import java.util.Collection;

 import java.util.Collections;

 import java.util.Map;

 import java.util.Set;

 /**

  * @author shot

  */

 public abstract class AbstractUnmodifiableExternalContextMap extends

         AbstractExternalContextMap {

     //TODO REMOVE this after org.seasar.teeda.core.context.portlet.* remove.

     public AbstractUnmodifiableExternalContextMap() {

     }

     public final Set entrySet() {

         return Collections.unmodifiableSet(super.entrySet());

     }

     public final Set keySet() {

         return Collections.unmodifiableSet(super.keySet());

     }

     public final Collection values() {

         return Collections.unmodifiableCollection(super.values());

     }

     public final void clear() {

         throw new UnsupportedOperationException();

     }

     public final Object put(Object key, Object value) {

         throw new UnsupportedOperationException();

     }

     public final void putAll(Map map) {

         throw new UnsupportedOperationException();

     }

     public final Object remove(Object key) {

         throw new UnsupportedOperationException();

     }

     protected final void setAttribute(String key, Object value) {

         throw new UnsupportedOperationException();

     }

     protected final void removeAttribute(String key) {

         throw new UnsupportedOperationException();

     }

 }