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Java > Open Source Codes > com > jsptags > navigation > pager > SkipTagSupport


1 /*
2  * Pager Tag Library
3  *
4  * Copyright (C) 2002 James Klicman <james@jsptags.com>
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19  */

20
21 package com.jsptags.navigation.pager;
22
23 import javax.servlet.jsp.*;
24 import javax.servlet.jsp.tagext.*;
25
26 public abstract class SkipTagSupport extends PageTagSupport {
27
28     private boolean ifnull = false;
29
30     public final void setIfnull(boolean b) {
31         ifnull = b;
32     }
33
34     public final boolean getIfnull() {
35         return ifnull;
36     }
37
38     protected abstract boolean skip();
39
40     public int doStartTag() throws JspException {
41         super.doStartTag();
42
43         if (!skip()) {
44
45             if (!ifnull)
46                 return SKIP_BODY;
47
48             removeAttributes();
49         }
50
51         return EVAL_BODY_INCLUDE;
52     }
53
54     public void release() {
55         ifnull = false;
56         super.release();
57     }
58 }
59
60 /* vim:set ts=4 sw=4: */
61
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