trunk/src/modules-core/acusecases/java/src/org/apache/lenya/cms/ac/usecases/Logout.java

/*
 * 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.lenya.cms.ac.usecases;

import java.util.Map;
import java.util.Vector;

import org.apache.lenya.ac.Identity;
import org.apache.lenya.cms.repository.RepositoryUtil;
import org.apache.cocoon.components.ContextHelper;
import org.apache.cocoon.environment.ObjectModelHelper;
import org.apache.cocoon.environment.Request;
import org.apache.cocoon.environment.Session;

/**
 * Usecase to log a user out.
 * 
 * @version $Id: Logout.java 407305 2006-05-17 16:21:49Z andreas $
 */
public class Logout extends AccessControlUsecase {

    /**
     * @see org.apache.lenya.cms.usecase.AbstractUsecase#initParameters()
     */
    protected void initParameters() {
        super.initParameters();
        Map objectModel = ContextHelper.getObjectModel(getContext());
        Request request = ObjectModelHelper.getRequest(objectModel);
        Session session = request.getSession(false);

        if (session != null) {
            Vector history = (Vector) session
                    .getAttribute(Login.HISTORY_SESSION_ATTRIBUTE);
            setParameter("history", history.toArray());
        }
    }
    
    /**
     * @see org.apache.lenya.cms.usecase.AbstractUsecase#doExecute()
     */
    protected void doExecute() throws Exception {

        Map objectModel = ContextHelper.getObjectModel(getContext());
        Request request = ObjectModelHelper.getRequest(objectModel);
        Session session = request.getSession(false);

        if (session != null) {
            session.removeAttribute(Identity.class.getName());
            RepositoryUtil.removeSession(manager, request);
            session.removeAttribute(Login.HISTORY_SESSION_ATTRIBUTE);
        }
    }
}