1 /*
2 * $Header: /cvsroot/jdbforms/dbforms/src/org/dbforms/taglib/DbHeaderTag.java,v 1.12 2005/11/28 21:10:56 hkollmann Exp $
3 * $Revision: 1.12 $
4 * $Date: 2005/11/28 21:10:56 $
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
24 package org.dbforms.taglib;
25
26 import javax.servlet.jsp.*;
27
28
29
30 /***
31 * this tag renders a Header-tag. it is supposed to be nested within a
32 * DbFormTag. because this tag is nested within a DbFormTag it is invoked
33 * every time the parent dbFormTag gets evaluated, but it gets only rendered
34 * at the FIRST evalation-loop.
35 *
36 * @author Joachim Peer
37 */
38 public class DbHeaderTag extends AbstractDbBaseHandlerTag {
39 /***
40 * DOCUMENT ME!
41 *
42 * @return DOCUMENT ME!
43 *
44 * @throws JspException DOCUMENT ME!
45 */
46 public int doAfterBody() throws JspException {
47 return SKIP_BODY;
48 }
49
50
51 /***
52 * DOCUMENT ME!
53 *
54 * @return DOCUMENT ME!
55 *
56 * @throws JspException DOCUMENT ME!
57 */
58 public int doEndTag() throws JspException {
59 try {
60 if (bodyContent != null) {
61 bodyContent.writeOut(bodyContent.getEnclosingWriter());
62 bodyContent.clearBody(); // 2002116-HKK: workaround for duplicate rows in Tomcat 4.1
63 }
64 } catch (java.io.IOException e) {
65 throw new JspException("IO Error: " + e.getMessage());
66 }
67
68 return EVAL_PAGE;
69 }
70
71
72 /***
73 * DOCUMENT ME!
74 *
75 * @return DOCUMENT ME!
76 */
77 public int doStartTag() {
78 if (getParentForm()
79 .getCurrentCount() == 0) {
80 return EVAL_BODY_BUFFERED;
81 } else {
82 return SKIP_BODY;
83 }
84 }
85 }