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Java > Open Source Codes > com > caucho > server > dispatch > ExceptionFilterChain


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free SoftwareFoundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.server.dispatch;
30
31 import javax.servlet.FilterChain JavaDoc;
32 import javax.servlet.ServletException JavaDoc;
33 import javax.servlet.ServletRequest JavaDoc;
34 import javax.servlet.ServletResponse JavaDoc;
35 import java.io.IOException JavaDoc;
36
37 /**
38  * Represents the final servlet in a filter chain.
39  */
40 public class ExceptionFilterChain implements FilterChain JavaDoc {
41   // servlet
42 private ServletException JavaDoc _exception;
43
44   /**
45    * Create the exception filter chain.
46    *
47    * @param exception the exception to throw
48    */
49   public ExceptionFilterChain(Throwable JavaDoc exn)
50   {
51     if (exn instanceof ServletException JavaDoc)
52       _exception = (ServletException JavaDoc) exn;
53     else
54       _exception = new ServletException JavaDoc(exn);
55   }
56   
57   /**
58    * Invokes the final servlet at the end of the chain.
59    *
60    * @param request the servlet request
61    * @param response the servlet response
62    */
63   public void doFilter(ServletRequest JavaDoc request,
64                        ServletResponse JavaDoc response)
65     throws ServletException JavaDoc, IOException JavaDoc
66   {
67     throw _exception;
68   }
69 }
70
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