/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*
* $Header:$
*/
package org.apache.beehive.netui.script.el.util;
import java.util.Iterator;
import javax.servlet.http.HttpSession;
import org.apache.beehive.netui.util.iterator.EnumerationIterator;
/**
* Class that puts a {@link java.util.Map} facade atop a {@link HttpSession}'s attribute map.
*/
public class SessionAttributeMapFacade
extends MapFacade
implements WrappedObject {
private HttpSession _session = null;
public SessionAttributeMapFacade(HttpSession session) {
_session = session;
}
/**
* Implementation of the {@link WrappedObject} API that allows the caller to discover the
* backing object.
*
* @return the backing object
*/
public Object unwrap() {
return _session;
}
protected Object getValue(Object key) {
if(key == null)
return null;
assert _session != null;
return _session.getAttribute(key.toString());
}
protected Object putValue(Object key, Object value) {
String strKey = key.toString();
Object prev = _session.getAttribute(strKey);
_session.setAttribute(strKey, value);
return prev;
}
protected Iterator getKeys() {
return new EnumerationIterator(_session.getAttributeNames());
}
}