/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.server.dispatch;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import java.io.IOException;
/**
* Represents the final servlet in a filter chain.
*/
public class ExceptionFilterChain implements FilterChain {
// servlet
private RuntimeException _runtimeException;
private ServletException _servletException;
/**
* Create the exception filter chain.
*
* @param exception the exception to throw
*/
public ExceptionFilterChain(Throwable exn)
{
if (exn instanceof RuntimeException)
_runtimeException = (RuntimeException) exn;
else if (exn instanceof ServletException)
_servletException = (ServletException) exn;
else
_servletException = new ServletException(exn);
}
/**
* Invokes the final servlet at the end of the chain.
*
* @param request the servlet request
* @param response the servlet response
*/
public void doFilter(ServletRequest request,
ServletResponse response)
throws ServletException, IOException
{
if (_runtimeException != null)
throw _runtimeException;
else
throw _servletException;
}
@Override
public String toString()
{
return (getClass().getSimpleName()
+ "[" + (_runtimeException != null
? _runtimeException
: _servletException)
+ "]");
}
}