| /* |
| * 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.context; |
| |
| import javax.faces.context.ExceptionHandler; |
| import javax.faces.context.ExceptionHandlerWrapper; |
| import javax.faces.context.FacesContext; |
| import javax.faces.context.PartialViewContext; |
| 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; |
| PartialViewContext pvc = facesContext.getPartialViewContext(); |
| if (pvc == null) |
| { |
| return false; |
| } |
| _isAjaxRequest = pvc.isAjaxRequest(); |
| } |
| return _isAjaxRequest; |
| } |
| |
| protected boolean isAjaxRequest() |
| { |
| if (_isAjaxRequest == null) |
| { |
| FacesContext facesContext = FacesContext.getCurrentInstance(); |
| PartialViewContext pvc = facesContext.getPartialViewContext(); |
| if (pvc == null) |
| { |
| return false; |
| } |
| _isAjaxRequest = pvc.isAjaxRequest(); |
| } |
| return _isAjaxRequest; |
| } |
| |
| @Override |
| public ExceptionHandler getWrapped() |
| { |
| if (isAjaxRequest()) |
| { |
| return _ajaxExceptionHandler; |
| } |
| else |
| { |
| return _requestExceptionHandler; |
| } |
| } |
| } |