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Java > Open Source Codes > org > tigris > scarab > pipeline > DetermineCharsetValve22


1 package org.tigris.scarab.pipeline;
2
3 /* ================================================================
4  * Copyright (c) 2001 Collab.Net. All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions are
8  * met:
9  *
10  * 1. Redistributions of source code must retain the above copyright
11  * notice, this list of conditions and the following disclaimer.
12  *
13  * 2. Redistributions in binary form must reproduce the above copyright
14  * notice, this list of conditions and the following disclaimer in the
15  * documentation and/or other materials provided with the distribution.
16  *
17  * 3. The end-user documentation included with the redistribution, if
18  * any, must include the following acknowlegement: "This product includes
19  * software developed by Collab.Net <http://www.Collab.Net/>."
20  * Alternately, this acknowlegement may appear in the software itself, if
21  * and wherever such third-party acknowlegements normally appear.
22  *
23  * 4. The hosted project names must not be used to endorse or promote
24  * products derived from this software without prior written
25  * permission. For written permission, please contact info@collab.net.
26  *
27  * 5. Products derived from this software may not use the "Tigris" or
28  * "Scarab" names nor may "Tigris" or "Scarab" appear in their names without
29  * prior written permission of Collab.Net.
30  *
31  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
32  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
33  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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38  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
39  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
40  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
41  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42  *
43  * ====================================================================
44  *
45  * This software consists of voluntary contributions made by many
46  * individuals on behalf of Collab.Net.
47  */
48
49 import java.io.IOException JavaDoc;
50
51 import org.apache.turbine.RunData;
52 import org.apache.turbine.Turbine;
53 import org.apache.turbine.TurbineException;
54 import org.apache.turbine.ValveContext;
55 import org.apache.turbine.pipeline.AbstractValve;
56 import org.tigris.scarab.util.ComponentLocator;
57
58 /**
59  * This valve determines the charset to use when parsing request parameters.
60  * It is identical to {@link DetermineCharsetValve} except it is usable under
61  * servlet 2.2 libraries.
62  *
63  * @author <a HREF="mailto:jmcnally@collab.net">John McNally</a>
64  * @version $Id: DetermineCharsetValve22.java 9286 2004-12-03 12:10:28Z dep4b $
65  */
66 public class DetermineCharsetValve22
67     extends AbstractValve
68 {
69
70     private static String JavaDoc REQUIRED_CHARSET;
71
72     public void initialize() throws Exception JavaDoc{
73         super.initialize();
74         REQUIRED_CHARSET = Turbine.getConfiguration().
75         getString("locale.default.charset",null);
76     }
77     
78     /**
79      * @see org.apache.turbine.Valve#invoke(RunData, ValveContext)
80      */
81     public void invoke(RunData data, ValveContext context)
82         throws IOException JavaDoc, TurbineException
83     {
84         // if we are forcing a particular charset, use it. Hopefully
85 // client has encoded for this default. This is the same
86 // property that will force the charset in our responses.
87 String JavaDoc encoding = REQUIRED_CHARSET;
88
89         if (encoding == null)
90         {
91             // guess the charset from the client's headers
92 encoding = ComponentLocator.getMimeTypeService().getCharSet(data.getLocale());
93         }
94
95         // if the charset was specified in the configuration or the charset
96 // map contained a value for the locale, set it, otherwise leave
97 // it as the servlet engine has set it.
98 if (encoding != null)
99         {
100             // data.getRequest().setCharacterEncoding(encoding);
101 data.setCharSet(encoding);
102         }
103         
104         // Pass control to the next Valve in the Pipeline
105 context.invokeNext(data);
106     }
107 }
108
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