/*
 * Copyright 1999-2004 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.cocoon.components.modules.input;

import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.thread.ThreadSafe;
import org.apache.cocoon.environment.ObjectModelHelper;

import java.util.Map;

/**
 * SessionModule provides access to Session object properties.
 * To get access to session properties use XPath syntax, e.g. to get the session
 * id use <code>'id'</code> as the attribute name.<br/>
 * More complex expressions with functions are also supported, e.g.:
 * <pre>
 * 'substring(id, 8)'
 * </pre>
 * will return the substring of id property of the session object.
 * <strong>NOTE:</strong> The module does not create a new session.
 *
 * @version $Id$
 */
public class SessionModule extends AbstractJXPathModule
    implements ThreadSafe {

    protected Object getContextObject(Configuration modeConf,
                                      Map objectModel) {

        return ObjectModelHelper.getRequest(objectModel).getSession(false);
    }
}