/*

  * $Id: AbstractTilesListener.java 952763 2010-06-08 18:28:16Z apetrelli $

  *

  * 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.tiles.web.startup;

 import javax.servlet.ServletContext;

 import javax.servlet.ServletContextEvent;

 import javax.servlet.ServletContextListener;

 import org.apache.tiles.request.servlet.ServletApplicationContext;

 import org.apache.tiles.startup.TilesInitializer;

 /**

  * Listener for the initialization of the Tiles container.

  *

  * @version $Rev: 952763 $ $Date: 2010-06-09 04:28:16 +1000 (Wed, 09 Jun 2010) $

  */

 public abstract class AbstractTilesListener implements ServletContextListener {

     /**

      * The initializer object.

      *

      * @since 2.1.2

      */

     protected TilesInitializer initializer;

     /**

      * Initialize the TilesContainer and place it

      * into service.

      *

      * @param event The intercepted event.

      */

     public void contextInitialized(ServletContextEvent event) {

         ServletContext servletContext = event.getServletContext();

         initializer = createTilesInitializer();

         initializer.initialize(new ServletApplicationContext(

                 servletContext));

     }

     /**

      * Destroys the initializer.

      *

      * @param event The intercepted event.

      */

     public void contextDestroyed(ServletContextEvent event) {

         initializer.destroy();

     }

     /**

      * Creates a new instance of {@link TilesInitializer}. Implement it to use a

      * different initializer.

      *

      * @return The Tiles servlet-based initializer.

      * @since 2.2.0

      */

     protected abstract TilesInitializer createTilesInitializer();

 }