/*
* 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);
}
}