/*
 * $Id$
 *
 * 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.
 */

package org.apache.struts2.portlet.servlet;

import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;

import javax.portlet.PortletSession;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpSessionContext;

/**
 * Wrapper object exposing a {@link PortletSession} as a {@link HttpSession} instance.
 * Clients accessing this session object will in fact operate on the
 * {@link PortletSession} object wrapped by this session object.
 */
public class PortletHttpSession implements HttpSession {

	private PortletSession portletSession;

	public PortletHttpSession(PortletSession portletSession) {
		this.portletSession = portletSession;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.http.HttpSession#getAttribute(java.lang.String)
	 */
	public Object getAttribute(String name) {
		return portletSession.getAttribute(name);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.http.HttpSession#getAttributeNames()
	 */
	public Enumeration getAttributeNames() {
		return portletSession.getAttributeNames();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.http.HttpSession#getCreationTime()
	 */
	public long getCreationTime() {
		return portletSession.getCreationTime();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.http.HttpSession#getId()
	 */
	public String getId() {
		return portletSession.getId();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.http.HttpSession#getLastAccessedTime()
	 */
	public long getLastAccessedTime() {
		return portletSession.getLastAccessedTime();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.http.HttpSession#getMaxInactiveInterval()
	 */
	public int getMaxInactiveInterval() {
		return portletSession.getMaxInactiveInterval();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.http.HttpSession#getServletContext()
	 */
	public ServletContext getServletContext() {
		return new PortletServletContext(portletSession.getPortletContext());
	}

	/**
	 * @see javax.servlet.http.HttpSession#getSessionContext()
	 * @throws IllegalStateException
	 *             Not supported in a portlet.
	 */
	public HttpSessionContext getSessionContext() {
		throw new IllegalStateException("Not supported in a portlet");
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.http.HttpSession#getValue(java.lang.String)
	 */
	public Object getValue(String name) {
		return getAttribute(name);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.http.HttpSession#getValueNames()
	 */
	public String[] getValueNames() {
		List<String> names = new ArrayList<String>();
		Enumeration attrNames = getAttributeNames();
		while (attrNames.hasMoreElements()) {
			names.add((String) attrNames.nextElement());
		}
		return names.toArray(new String[0]);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.http.HttpSession#invalidate()
	 */
	public void invalidate() {
		portletSession.invalidate();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.http.HttpSession#isNew()
	 */
	public boolean isNew() {
		return portletSession.isNew();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.http.HttpSession#putValue(java.lang.String,
	 *      java.lang.Object)
	 */
	public void putValue(String name, Object value) {
		setAttribute(name, value);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.http.HttpSession#removeAttribute(java.lang.String)
	 */
	public void removeAttribute(String name) {
		portletSession.removeAttribute(name);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.http.HttpSession#removeValue(java.lang.String)
	 */
	public void removeValue(String name) {
		removeAttribute(name);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.http.HttpSession#setAttribute(java.lang.String,
	 *      java.lang.Object)
	 */
	public void setAttribute(String name, Object value) {
		portletSession.setAttribute(name, value);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.http.HttpSession#setMaxInactiveInterval(int)
	 */
	public void setMaxInactiveInterval(int interval) {
		portletSession.setMaxInactiveInterval(interval);
	}

	/**
	 * Get the wrapped portlet session.
	 * 
	 * @return The wrapped portlet session.
	 */
	public PortletSession getPortletSession() {
		return portletSession;
	}

}
