01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * 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;
34: import javax.servlet.jsp.tagext.TagSupport;
35:
36: public class RemoveTag extends TagSupport {
37: private static L10N L = new L10N(RemoveTag.class);
38:
39: private String var;
40: private String scope;
41:
42: /**
43: * Sets the variable to assign
44: */
45: public void setVar(String var) {
46: this .var = var;
47: }
48:
49: /**
50: * Sets the scope of the variable.
51: */
52: public void setScope(String scope) {
53: this .scope = scope;
54: }
55:
56: /**
57: * Process the tag.
58: */
59: public int doStartTag() throws JspException {
60: if (scope == null) {
61: pageContext.removeAttribute(var);
62: } else if (scope.equals("page")) {
63: pageContext.removeAttribute(var);
64: } else if (scope.equals("request")) {
65: pageContext.getRequest().removeAttribute(var);
66: } else if (scope.equals("session")) {
67: pageContext.getSession().removeAttribute(var);
68: } else if (scope.equals("application")) {
69: pageContext.getServletContext().removeAttribute(var);
70: } else
71: throw new JspException(L
72: .l("illegal scope value {0}", scope));
73:
74: return SKIP_BODY;
75: }
76: }
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