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Java > Open Source Codes > com > caucho > jstl > el > RequestEncodingTag


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * 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.jstl.el;
30
31 import com.caucho.el.Expr;
32 import com.caucho.jsp.PageContextImpl;
33 import com.caucho.util.L10N;
34
35 import javax.servlet.http.HttpServletRequest JavaDoc;
36 import javax.servlet.jsp.JspException JavaDoc;
37 import javax.servlet.jsp.jstl.core.Config;
38 import javax.servlet.jsp.tagext.TagSupport JavaDoc;
39 import java.io.UnsupportedEncodingException JavaDoc;
40
41 /**
42  * Sets the i18n locale bundle for the current page.
43  */
44 public class RequestEncodingTag extends TagSupport JavaDoc {
45   private static L10N L = new L10N(RequestEncodingTag.class);
46   
47   private Expr _valueExpr;
48
49   /**
50    * Sets the JSP-EL expression for the locale value.
51    */
52   public void setValue(Expr value)
53   {
54     _valueExpr = value;
55   }
56
57   /**
58    * Process the tag.
59    */
60   public int doStartTag()
61     throws JspException JavaDoc
62   {
63     PageContextImpl pageContext = (PageContextImpl) this.pageContext;
64     HttpServletRequest JavaDoc request = (HttpServletRequest JavaDoc) pageContext.getRequest();
65
66     try {
67       String JavaDoc value = null;
68       if (_valueExpr != null)
69         value = _valueExpr.evalString(pageContext.getELContext());
70       else
71         value = (String JavaDoc) Config.find(pageContext, "javax.servlet.jsp.jstl.fmt.request.charset");
72
73       if (value != null && ! value.equals(""))
74         request.setCharacterEncoding(value);
75     } catch (UnsupportedEncodingException JavaDoc e) {
76       throw new JspException JavaDoc(e);
77     }
78
79     return SKIP_BODY;
80   }
81 }
82
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