1 /*
2 * The SmartWeb Framework
3 * Copyright (C) 2004-2006
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 * For further informations on the SmartWeb Framework please visit
20 *
21 * http://smartweb.sourceforge.net
22 */
23
24 package net.smartlab.web;
25
26 import javax.servlet.jsp.JspException;
27
28 import org.apache.struts.taglib.html.HiddenTag;
29
30 /**
31 * This tag is an helper to mark a multiple selection as empty using an hidden HTML tag as a marker.
32 *
33 * @author rlogiacco
34 * @jsp.tag name="empty-marker" body-content="empty"
35 */
36 public class EmptyMarkerTag extends HiddenTag {
37
38 private static final long serialVersionUID = -2598054548619840702L;
39
40 /**
41 * Value of the hidden field to mark as an empty selection.
42 */
43 public final static String EMPTY_MARKER = "net.smartlab.web.empty";
44
45 /**
46 * @see javax.servlet.jsp.tagext.Tag#doStartTag()
47 */
48 public int doStartTag() throws JspException {
49 super.value = EMPTY_MARKER;
50 return super.doStartTag();
51 }
52 }