/*
 * Copyright 1999,2005 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 javax.servlet.http;

import java.util.EventListener;


/**
 * Causes an object to be notified when it is bound to
 * or unbound from a session. The object is notified
 * by an {@link HttpSessionBindingEvent} object.
 *
 *
 * @author		Various
 * @version		$Version$
 *
 * @see HttpSession
 * @see HttpSessionBindingEvent
 *
 */

public interface HttpSessionBindingListener extends EventListener {


    /**
     *
     * Notifies the object that it is being bound to
     * a session and identifies the session.
     *
     * @param event		the event that identifies the
     *				session
     *
     * @see #valueUnbound
     *
     */

    public void valueBound(HttpSessionBindingEvent event);


    /**
     *
     * Notifies the object that it is being unbound
     * from a session and identifies the session.
     *
     * @param event		the event that identifies
     *				the session
     *	
     * @see #valueBound
     *
     */

    public void valueUnbound(HttpSessionBindingEvent event);


}