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Java > Open Source Codes > org > dbforms > taglib > DbFooterTag


1 /*
2  * $Header: /cvsroot/jdbforms/dbforms/src/org/dbforms/taglib/DbFooterTag.java,v 1.16 2004/10/26 19:46:07 hkollmann Exp $
3  * $Revision: 1.16 $
4  * $Date: 2004/10/26 19:46:07 $
5  *
6  * DbForms - a Rapid Application Development Framework
7  * Copyright (C) 2001 Joachim Peer <joepeer@excite.com>
8  *
9  * This library is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * This library 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. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with this library; if not, write to the Free Software
21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22  */
23 package org.dbforms.taglib;
24 import javax.servlet.jsp.JspException JavaDoc;
25
26
27
28 /**
29  * this tag renders a Footer-tag. it is supposed to be nested within a
30  * DbFormTag. because this tag is nested within a DbFormTag it is invoked
31  * every time the parent dbFormTag gets evaluated, but it gets only rendered
32  * at the end of the last evalation-loop.
33  *
34  * @author Joachim Peer
35  */
36 public class DbFooterTag extends DbBaseHandlerTag {
37    /**
38     * DOCUMENT ME!
39     *
40     * @return DOCUMENT ME!
41     *
42     * @throws JspException DOCUMENT ME!
43     */
44    public int doAfterBody() throws JspException JavaDoc {
45       return SKIP_BODY; // a footer gets onle 1 time rendered
46 }
47
48
49    /**
50     * DOCUMENT ME!
51     *
52     * @return DOCUMENT ME!
53     *
54     * @throws JspException DOCUMENT ME!
55     */
56    public int doEndTag() throws JspException JavaDoc {
57       try {
58          if (bodyContent != null) {
59             bodyContent.writeOut(bodyContent.getEnclosingWriter());
60             bodyContent.clearBody(); // 2002116-HKK: workaround for duplicate rows in Tomcat 4.1
61 }
62       } catch (java.io.IOException JavaDoc e) {
63          throw new JspException JavaDoc("IO Error: " + e.getMessage());
64       }
65
66       return EVAL_PAGE;
67    }
68
69
70    /**
71     * DOCUMENT ME!
72     *
73     * @return DOCUMENT ME!
74     */
75    public int doStartTag() {
76       if (getParentForm().isFooterReached()) {
77          return EVAL_BODY_BUFFERED;
78       } else {
79          return SKIP_BODY;
80       }
81    }
82 }
83
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