KickJava   Java API By Example, From Geeks To Geeks.

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


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.jstl.ParamContainerTag;
34 import com.caucho.util.L10N;
35
36 import javax.servlet.jsp.JspException JavaDoc;
37 import javax.servlet.jsp.tagext.BodyTagSupport JavaDoc;
38
39 /**
40  * Looks up an i18n message from a bundle and prints it.
41  */
42 public class FmtParamTag extends BodyTagSupport JavaDoc {
43   private static L10N L = new L10N(FmtParamTag.class);
44   
45   private Expr _valueExpr;
46
47   /**
48    * Sets the value
49    *
50    * @param key the JSP-EL expression for the key.
51    */
52   public void setValue(Expr value)
53   {
54     _valueExpr = value;
55   }
56
57   /**
58    * Process the tag.
59    */
60   public int doEndTag()
61     throws JspException JavaDoc
62   {
63     try {
64       Object JavaDoc value = null;
65
66       PageContextImpl pageContext = (PageContextImpl) this.pageContext;
67     
68       if (_valueExpr != null)
69     value = _valueExpr.evalObject(pageContext.getELContext());
70       else
71     value = bodyContent.getString().trim();
72
73       Object JavaDoc parent = getParent();
74       if (! (parent instanceof ParamContainerTag))
75     throw new JspException JavaDoc(L.l("fmt:param requires fmt:message parent."));
76
77       ParamContainerTag message = (ParamContainerTag) parent;
78
79       message.addParam(value);
80     
81       return EVAL_PAGE;
82     } catch (Exception JavaDoc e) {
83       throw new JspException JavaDoc(e);
84     }
85   }
86 }
87
Popular Tags