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Java > Open Source Codes > org > apache > geronimo > console > web > taglib > ClearFilterTag


1 /**
2  *
3  * Copyright 2003-2004 The Apache Software Foundation
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17
18 package org.apache.geronimo.console.web.taglib;
19
20 import java.io.IOException JavaDoc;
21 import javax.management.MBeanServer JavaDoc;
22 import javax.servlet.jsp.JspWriter JavaDoc;
23
24 /**
25  * If the application detects that a filter other than "*:*" has been used in
26  * the console for limiting the components displayed, this button will appear,
27  * allowing the user to revert to the default filter. If the default filter is
28  * being used, no button shall appear.
29  */
30 public final class ClearFilterTag extends MBeanServerContextSupport {
31     private MBeanServerContextTag ctx;
32     private MBeanServer JavaDoc server;
33
34     public int doStartTag() {
35         ctx = getMBeanServerContext();
36         server = ctx.getMBeanServer();
37         JspWriter JavaDoc out = pageContext.getOut();
38
39         try {
40             if (server != null) {
41                 if (filtered()) {
42                     out.println("<input class=\"submit\" type=\"button\" " +
43                             "tabindex=\"2\" value=\"Clear Filter\" " +
44                             "onclick=\"window.location='index.jsp'\"/>");
45                 }
46             }
47         } catch (IOException JavaDoc e) {
48             e.printStackTrace();
49         }
50         return EVAL_BODY_INCLUDE;
51     }
52
53     public int doEndTag() {
54         return EVAL_PAGE;
55     }
56
57     private boolean filtered() {
58         return (!ctx.getObjectNameFilter().equals("*:*"));
59     }
60 }
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