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


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 import java.io.IOException JavaDoc;
26
27 public final class PagesTag extends PageTagSupport implements BodyTag {
28
29     private BodyContent bodyContent = null;
30     private int page = 0;
31     private int lastPage = 0;
32
33     public void setBodyContent(BodyContent bc) {
34         bodyContent = bc;
35     }
36
37     public int doStartTag() throws JspException {
38         super.doStartTag();
39
40         int firstPage = pagerTag.getFirstIndexPage();
41         lastPage = pagerTag.getLastIndexPage(firstPage);
42         page = firstPage;
43
44         return (page <= lastPage ? EVAL_BODY_TAG : SKIP_BODY);
45     }
46
47     public void doInitBody() throws JspException {
48         setPageAttributes(page);
49         page++;
50     }
51
52     public int doAfterBody() throws JspException {
53         if (page <= lastPage) {
54             setPageAttributes(page);
55             page++;
56             return EVAL_BODY_TAG;
57         } else {
58             try {
59                 bodyContent.writeOut(bodyContent.getEnclosingWriter());
60                 return SKIP_BODY;
61             } catch (IOException JavaDoc e) {
62                 throw new JspTagException(e.toString());
63             }
64         }
65     }
66
67     public int doEndTag() throws JspException {
68
69         bodyContent = null;
70
71         super.doEndTag();
72
73         return EVAL_PAGE;
74     }
75
76     public void release() {
77         bodyContent = null;
78         super.release();
79     }
80 }
81
82 /* vim:set ts=4 sw=4: */
83
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