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


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.TagSupport JavaDoc;
35
36 public class RemoveTag extends TagSupport JavaDoc {
37   private static L10N L = new L10N(RemoveTag.class);
38
39   private String JavaDoc var;
40   private String JavaDoc scope;
41
42   /**
43    * Sets the variable to assign
44    */
45   public void setVar(String JavaDoc var)
46   {
47     this.var = var;
48   }
49
50   /**
51    * Sets the scope of the variable.
52    */
53   public void setScope(String JavaDoc scope)
54   {
55     this.scope = scope;
56   }
57
58   /**
59    * Process the tag.
60    */
61   public int doStartTag()
62     throws JspException JavaDoc
63   {
64     if (scope == null) {
65       pageContext.removeAttribute(var);
66     }
67     else if (scope.equals("page")) {
68       pageContext.removeAttribute(var);
69     }
70     else if (scope.equals("request")) {
71       pageContext.getRequest().removeAttribute(var);
72     }
73     else if (scope.equals("session")) {
74       pageContext.getSession().removeAttribute(var);
75     }
76     else if (scope.equals("application")) {
77       pageContext.getServletContext().removeAttribute(var);
78     }
79     else
80       throw new JspException JavaDoc(L.l("illegal scope value {0}", scope));
81
82     return SKIP_BODY;
83   }
84 }
85
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