/*
* 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.shared.context;
import javax.faces.context.ExceptionHandler;
import javax.faces.context.ExceptionHandlerWrapper;
import javax.faces.context.FacesContext;
import javax.faces.event.AbortProcessingException;
import javax.faces.event.ExceptionQueuedEvent;
import javax.faces.event.ExceptionQueuedEventContext;
import javax.faces.event.SystemEvent;
/**
* This wrapper is a switch to choose in a lazy way between ajax and
* normal exceptionHandler wrapping, because FacesContext is initialized after
* ExceptionHandler, so it is not safe to get it when
* ExceptionHandlerFactory.getExceptionHandler() is called.
*/
public class SwitchAjaxExceptionHandlerWrapperImpl extends ExceptionHandlerWrapper
{
private ExceptionHandler _requestExceptionHandler;
private ExceptionHandler _ajaxExceptionHandler;
private Boolean _isAjaxRequest;
public SwitchAjaxExceptionHandlerWrapperImpl(
ExceptionHandler requestExceptionHandler,
ExceptionHandler ajaxExceptionHandler)
{
_requestExceptionHandler = requestExceptionHandler;
_ajaxExceptionHandler = ajaxExceptionHandler;
}
@Override
public void processEvent(SystemEvent exceptionQueuedEvent)
throws AbortProcessingException
{
//Check if this is an ajax request, but take advantage of exceptionQueuedEvent facesContext
isAjaxRequest(exceptionQueuedEvent);
super.processEvent(exceptionQueuedEvent);
}
protected boolean isAjaxRequest(SystemEvent exceptionQueuedEvent)
{
if (_isAjaxRequest == null)
{
if (exceptionQueuedEvent instanceof ExceptionQueuedEvent)
{
ExceptionQueuedEvent eqe = (ExceptionQueuedEvent)exceptionQueuedEvent;
ExceptionQueuedEventContext eqec = eqe.getContext();
if (eqec != null)
{
FacesContext facesContext = eqec.getContext();
if (facesContext != null)
{
return isAjaxRequest(facesContext);
}
}
}
return isAjaxRequest();
}
return _isAjaxRequest;
}
protected boolean isAjaxRequest(FacesContext facesContext)
{
if (_isAjaxRequest == null)
{
facesContext = (facesContext == null) ? FacesContext.getCurrentInstance() : facesContext;
_isAjaxRequest = facesContext.getPartialViewContext().isAjaxRequest();
}
return _isAjaxRequest;
}
protected boolean isAjaxRequest()
{
if (_isAjaxRequest == null)
{
FacesContext facesContext = FacesContext.getCurrentInstance();
_isAjaxRequest = facesContext.getPartialViewContext().isAjaxRequest();
}
return _isAjaxRequest;
}
@Override
public ExceptionHandler getWrapped()
{
if (isAjaxRequest())
{
return _ajaxExceptionHandler;
}
else
{
return _requestExceptionHandler;
}
}
}