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Java > Open Source Codes > org > apache > struts > chain > servlet > PerformForward


1 /*
2  * Copyright 2003,2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16
17 package org.apache.struts.chain.servlet;
18
19
20 import javax.servlet.RequestDispatcher JavaDoc;
21 import javax.servlet.http.HttpServletRequest JavaDoc;
22 import org.apache.commons.chain.Context;
23 import org.apache.commons.chain.web.servlet.ServletWebContext;
24 import org.apache.struts.chain.AbstractPerformForward;
25 import org.apache.struts.config.ForwardConfig;
26 import org.apache.struts.config.ModuleConfig;
27 import org.apache.struts.upload.MultipartRequestWrapper;
28 import org.apache.struts.util.RequestUtils;
29
30
31 /**
32  * <p>Perform forwarding or redirection based on the specified
33  * <code>ForwardConfig</code> (if any).</p>
34  *
35  * @version $Rev: 54933 $ $Date: 2004-10-16 18:04:52 +0100 (Sat, 16 Oct 2004) $
36  */
37
38 public class PerformForward extends AbstractPerformForward {
39
40
41     // ------------------------------------------------------- Protected Methods
42
43
44     /**
45      * <p>Perform the appropriate processing on the specified
46      * <code>ForwardConfig</code>.</p>
47      *
48      * @param context The context for this request
49      * @param forwardConfig The forward to be performed
50      */
51     protected void perform(Context context,ForwardConfig forwardConfig)
52         throws Exception JavaDoc {
53
54         ServletWebContext swcontext = (ServletWebContext) context;
55         String JavaDoc forwardPath = forwardConfig.getPath();
56         String JavaDoc uri = null;
57
58         ModuleConfig moduleConfig = (ModuleConfig) context.get(getModuleConfigKey());
59         // Resolve module-relative paths
60 if (forwardPath.startsWith("/")) {
61             uri = RequestUtils.forwardURL(swcontext.getRequest(),
62                                           forwardConfig,
63                                           moduleConfig);
64         } else {
65             uri = forwardPath;
66         }
67
68         // Get the underlying request in the case of a multipart wrapper
69 HttpServletRequest JavaDoc request = swcontext.getRequest();
70         if (request instanceof MultipartRequestWrapper) {
71             request = ((MultipartRequestWrapper) request).getRequest();
72         }
73
74         // Perform redirect or forward
75 if (forwardConfig.getRedirect()) {
76             if (uri.startsWith("/")) {
77                 uri = request.getContextPath() + uri;
78             }
79             swcontext.getResponse().sendRedirect
80                 (swcontext.getResponse().encodeRedirectURL(uri));
81         } else {
82             RequestDispatcher JavaDoc rd =
83                 swcontext.getContext().getRequestDispatcher(uri);
84             rd.forward(request, swcontext.getResponse());
85         }
86
87     }
88
89
90 }
91
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