01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * 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;
32: import javax.servlet.RequestDispatcher;
33: import javax.servlet.ServletException;
34: import javax.servlet.ServletRequest;
35: import javax.servlet.ServletResponse;
36: import javax.servlet.http.HttpServletRequest;
37: import java.io.IOException;
38:
39: /**
40: * Does an internal forward of the request.
41: */
42: public class ForwardFilterChain implements FilterChain {
43: // servlet
44: private String _url;
45: private RequestDispatcher _disp;
46:
47: /**
48: * Create the forward filter chain servlet.
49: *
50: * @param url the request dispatcher to forward to.
51: */
52: public ForwardFilterChain(String url) {
53: _url = url;
54: }
55:
56: /**
57: * Create the forward filter chain servlet.
58: *
59: * @param disp the request dispatcher to forward to.
60: */
61: public ForwardFilterChain(RequestDispatcher disp) {
62: _disp = disp;
63: }
64:
65: /**
66: * Forwards to the dispatch
67: *
68: * @param request the servlet request
69: * @param response the servlet response
70: */
71: public void doFilter(ServletRequest request,
72: ServletResponse response) throws ServletException,
73: IOException {
74: if (_disp != null)
75: _disp.forward(request, response);
76: else {
77: HttpServletRequest req = (HttpServletRequest) request;
78:
79: RequestDispatcher disp = req.getRequestDispatcher(_url);
80:
81: disp.forward(request, response);
82: }
83: }
84:
85: public String toString() {
86: if (_disp != null)
87: return "ForwardFilterChain[" + _disp + "]";
88: else
89: return "ForwardFilterChain[" + _url + "]";
90: }
91: }
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