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Java > Open Source Codes > org > apache > taglibs > application > RemoveAttributeTag


1 /*
2  * Copyright 1999,2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */

16
17 package org.apache.taglibs.application;
18
19 import java.util.*;
20 import javax.servlet.*;
21 import javax.servlet.http.*;
22 import javax.servlet.jsp.*;
23 import javax.servlet.jsp.tagext.*;
24
25 /**
26  * JSP Tag <b>removeAttribute</b>, used to remove a ServletContext
27  * attribute with name <b>name</b>.
28  * <p>
29  * JSP Tag Lib Descriptor
30  * <p><pre>
31  * &lt;name&gt;removeAttribute&lt;/name&gt;
32  * &lt;tagclass&gt;org.apache.taglibs.application.RemoveAttributeTag&lt;/tagclass&gt;
33  * &lt;bodycontent&gt;empty&lt;/bodycontent&gt;
34  * &lt;info&gt;Removes an attribute from the ServletContext.&lt;/info&gt;
35  * &lt;attribute&gt;
36  * &lt;name&gt;name&lt;/name&gt;
37  * &lt;required&gt;true&lt;/required&gt;
38  * &lt;rtexprvalue&gt;false&lt;/rtexprvalue&gt;
39  * &lt;/attribute&gt;
40  * </pre>
41  *
42  * @author Morgan Delagrange
43  */

44
45 public class RemoveAttributeTag extends TagSupport
46 {
47     private String JavaDoc name = null;
48
49     /**
50      * Removes an attribute from the ServletContext.
51      *
52      * @return SKIP_BODY
53      */

54     public final int doStartTag() throws JspException
55     {
56     pageContext.getServletContext().removeAttribute(name);
57     return SKIP_BODY;
58     }
59
60     /**
61      * Set the required tag attribute <b>name</b>.
62      *
63      * @param String name of application attribute to remove
64      */

65     public final void setName(String JavaDoc str)
66     {
67     name = str;
68     }
69
70 }
71
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