2009/05/20 - Apache Shale has been retired.

 /*

  * 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.shale.view.faces;

 import javax.faces.context.FacesContext;

 import javax.faces.event.ActionEvent;

 import javax.faces.event.ActionListener;

 import org.apache.shale.view.Constants;

 import org.apache.shale.view.ExceptionHandler;

 /**

  * <p>Replacement for the default <code>ActionListener</code> implementation

  * used during the <em>Invoke Application</em> phase of the request processing

  * lifecycle.</p>

  *

  * @since 1.0.3

  *

  * $Id: ViewActionListener.java 464373 2006-10-16 04:21:54Z rahul $

  */

 public final class ViewActionListener implements ActionListener {

     // ------------------------------------------------------------- Constructor

     /**

      * <p>Create a new action listener instance.</p>

      *

      * @param original The original action listener instance we are wrapping

      */

     public ViewActionListener(ActionListener original) {

         this.original = original;

     }

     // ------------------------------------------------------ Instance Variables

     /**

      * <p>The original <code>ActionListener</code> instance we are wrapping.</p>

      */

     private ActionListener original = null;

     // -------------------------------------------------- ActionListener Methods

     /**

      * <p>Handle a default action event.</p>

      *

      * @param event The <code>ActionEvent</code> to be handled

      */

     public void processAction(ActionEvent event) {

         // FIXME - this is probably not the final answer, but gives

         // us a starting point to deal with application event handlers

         // throwing exceptions in a way consistent with elsewhere

         try {

             original.processAction(event);

         } catch (Exception e) {

             handleException(FacesContext.getCurrentInstance(), e);

         }

     }

     // --------------------------------------------------------- Private Methods

     /**

      * <p>Handle the specified exception according to the strategy

      * defined by our current {@link ExceptionHandler}.</p>

      *

      * @param context FacesContext for the current request

      * @param exception Exception to be handled

      */

     private void handleException(FacesContext context, Exception exception) {

         if (context == null) {

             exception.printStackTrace(System.out);

             return;

         }

         ExceptionHandler handler = (ExceptionHandler)

           context.getApplication().getVariableResolver().resolveVariable

                 (context, Constants.EXCEPTION_HANDLER);

         handler.handleException(exception);

     }

 }