sessionmap.java

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/*
 * Copyright 2004 The Apache Software Foundation.
 * 
 * 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.apache.myfaces.context.portlet;

import org.apache.myfaces.util.NullEnumeration;

import java.util.Enumeration;
import javax.portlet.PortletRequest;
import javax.portlet.PortletSession;
import org.apache.myfaces.context.servlet.AbstractAttributeMap;

/**
 * Portlet scope PortletSession attibutes as Map.
 * 
 * @author  Stan Silvert (latest modification by $Author: matzew $)
 * @version $Revision: 1.1 $ $Date: 2005/01/26 17:03:09 $
 * $Log: SessionMap.java,v $
 * Revision 1.1  2005/01/26 17:03:09  matzew
 * MYFACES-86. portlet support provided by Stan Silver (JBoss Group)
 *
 *
 */
public class SessionMap extends AbstractAttributeMap
{
    private final PortletRequest _portletRequest;

    SessionMap(PortletRequest portletRequest)
    {
        _portletRequest = portletRequest;
    }

    protected Object getAttribute(String key)
    {
        PortletSession portletSession = getSession();
        return (portletSession == null) 
            ? null : portletSession.getAttribute(key.toString(), PortletSession.PORTLET_SCOPE);
    }

    protected void setAttribute(String key, Object value)
    {
        _portletRequest.getPortletSession(true).setAttribute(key, value, PortletSession.PORTLET_SCOPE);
    }

    protected void removeAttribute(String key)
    {
        PortletSession portletSession = getSession();
        if (portletSession != null)
        {
            portletSession.removeAttribute(key, PortletSession.PORTLET_SCOPE);
        }
    }

    protected Enumeration getAttributeNames()
    {
        PortletSession portletSession = getSession();
        return (portletSession == null)
            ? NullEnumeration.instance()
            : portletSession.getAttributeNames(PortletSession.PORTLET_SCOPE);
    }
    
    private PortletSession getSession()
    {
        return _portletRequest.getPortletSession(false);
    }
}