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Java > Open Source Codes > org > outerj > daisy > frontend > util > CharacterEncodingFilter


1 /*
2  * Copyright 2004 Outerthought bvba and Schaubroeck nv
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 package org.outerj.daisy.frontend.util;
17
18 import javax.servlet.*;
19 import java.io.IOException JavaDoc;
20
21 /**
22  * A servlet filter for setting the character encoding.
23  */

24 public class CharacterEncodingFilter implements Filter {
25     private String JavaDoc encoding;
26
27     public void init(FilterConfig filterConfig) throws ServletException {
28         encoding = filterConfig.getInitParameter("encoding");
29     }
30
31     public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException JavaDoc, ServletException {
32         if (servletRequest.getCharacterEncoding() == null && this.encoding != null) {
33             servletRequest.setCharacterEncoding(this.encoding);
34         }
35         filterChain.doFilter(servletRequest, servletResponse);
36     }
37
38     public void destroy() {
39     }
40 }
41
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