KickJava   Java API By Example, From Geeks To Geeks.

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


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.
34  * IN NO EVENT SHALL COLLAB.NET OR ITS CONTRIBUTORS BE LIABLE FOR ANY
35  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
37  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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  *
61  * @author <a HREF="mailto:jmcnally@collab.net">John McNally</a>
62  * @version $Id: DetermineCharsetValve.java 9286 2004-12-03 12:10:28Z dep4b $
63  */
64 public class DetermineCharsetValve
65     extends AbstractValve
66 {
67
68     private static String JavaDoc REQUIRED_CHARSET;
69     
70     public void initialize() throws Exception JavaDoc{
71         super.initialize();
72         REQUIRED_CHARSET = Turbine.getConfiguration().
73         getString("locale.default.charset",null);
74     }
75
76     /**
77      * @see org.apache.turbine.Valve#invoke(RunData, ValveContext)
78      */
79     public void invoke(RunData data, ValveContext context)
80         throws IOException JavaDoc, TurbineException
81     {
82         // if we are forcing a particular charset, use it. Hopefully
83 // client has encoded for this default. This is the same
84 // property that will force the charset in our responses.
85 String JavaDoc encoding = REQUIRED_CHARSET;
86
87         if (encoding == null)
88         {
89             // guess the charset from the client's headers
90 encoding = ComponentLocator.getMimeTypeService().getCharSet(data.getLocale());
91         }
92
93         // if the charset was specified in the configuration or the charset
94 // map contained a value for the locale, set it, otherwise leave
95 // it as the servlet engine has set it.
96 if (encoding != null)
97         {
98             data.getRequest().setCharacterEncoding(encoding);
99             data.setCharSet(encoding);
100         }
101         
102         // Pass control to the next Valve in the Pipeline
103 context.invokeNext(data);
104     }
105 }
106
Popular Tags