/*

  * 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.myfaces.application;

 import javax.faces.FacesException;

 import javax.faces.application.Application;

 import javax.faces.application.NavigationHandler;

 import javax.faces.component.ActionSource;

 import javax.faces.context.FacesContext;

 import javax.faces.el.EvaluationException;

 import javax.faces.el.MethodBinding;

 import javax.faces.event.AbortProcessingException;

 import javax.faces.event.ActionEvent;

 import javax.faces.event.ActionListener;

 /**

  * @author Manfred Geiler (latest modification by $Author: skitching $)

  * @author Anton Koinov

  * @version $Revision: 684459 $ $Date: 2008-08-10 06:13:56 -0500 (Sun, 10 Aug 2008) $

  */

 public class ActionListenerImpl

     implements ActionListener

 {

     public void processAction(ActionEvent actionEvent) throws AbortProcessingException

     {

         FacesContext facesContext = FacesContext.getCurrentInstance();

         Application application = facesContext.getApplication();

         ActionSource actionSource = (ActionSource)actionEvent.getComponent();

         MethodBinding methodBinding = actionSource.getAction();

         String fromAction = null;

         String outcome = null;

         if (methodBinding != null)

         {

             fromAction = methodBinding.getExpressionString();

             try

             {

                 Object objOutcome = methodBinding.invoke(facesContext, null);

                 if (objOutcome != null)

                 {

                     outcome = objOutcome.toString();

                 }

             }

             catch (EvaluationException e)

             {

                 Throwable cause = e.getCause();

                 if (cause != null && cause instanceof AbortProcessingException)

                 {

                     throw (AbortProcessingException)cause;

                 }

                 throw new FacesException("Error calling action method of component with id " + actionEvent.getComponent().getClientId(facesContext), e);

             }

             catch (RuntimeException e)

             {

                 throw new FacesException("Error calling action method of component with id " + actionEvent.getComponent().getClientId(facesContext), e);

             }

         }

         NavigationHandler navigationHandler = application.getNavigationHandler();

         navigationHandler.handleNavigation(facesContext,

                                            fromAction,

                                            outcome);

         //Render Response if needed

         facesContext.renderResponse();

     }

 }