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Java > Open Source Codes > com > caucho > jstl > OtherwiseTag


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;
30
31 import com.caucho.util.L10N;
32
33 import javax.servlet.jsp.JspException JavaDoc;
34 import javax.servlet.jsp.tagext.Tag JavaDoc;
35 import javax.servlet.jsp.tagext.TagSupport JavaDoc;
36
37 /**
38  * Tag representing an "otherwise" condition.
39  */
40 public class OtherwiseTag extends TagSupport JavaDoc {
41   private static L10N L = new L10N(OtherwiseTag.class);
42
43   /**
44    * Process the tag.
45    */
46   public int doStartTag()
47     throws JspException JavaDoc
48   {
49     Tag JavaDoc parent = getParent();
50
51     if (! (parent instanceof ChooseTag))
52       throw new JspException JavaDoc(L.l("c:otherwise tag must be contained in a c:choose tag."));
53
54     ChooseTag chooseTag = (ChooseTag) parent;
55
56     if (chooseTag.isMatch())
57       return SKIP_BODY;
58
59     chooseTag.setMatch();
60       
61     return EVAL_BODY_INCLUDE;
62   }
63 }
64
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