01: /*
02: * (C) Copyright 2004 Nabh Information Systems, Inc.
03: *
04: * All copyright notices regarding Nabh's products MUST remain
05: * intact in the scripts and in the outputted HTML.
06: * This program is free software; you can redistribute it and/or
07: * modify it under the terms of the GNU Lesser General Public License
08: * as published by the Free Software Foundation; either version 2.1
09: * of the License, or (at your option) any later version.
10: *
11: * This program 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
14: * GNU Lesser General Public License for more details.
15: *
16: * You should have received a copy of the GNU Lesser General Public License
17: * along with this program; 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.nabhinc.portlet.mvcportlet.taglib;
22:
23: import javax.portlet.RenderRequest;
24: import javax.servlet.jsp.JspException;
25:
26: /**
27: * HTML hidden input tag.
28: *
29: * @author Padmanabh Dabke
30: * (c) 2004 Nabh Information Systems, Inc. All Rights Reserved.
31: */
32: public class HiddenTag extends InputTag {
33:
34: public HiddenTag() {
35: super ();
36: setType("hidden");
37: setStyleClass("hidden");
38: }
39:
40: public int doStartTag() throws JspException {
41:
42: RenderRequest request = (RenderRequest) pageContext
43: .getRequest().getAttribute("javax.portlet.request");
44:
45: String fieldValue = getValue();
46: if (fieldValue == null) {
47: fieldValue = getParamValue(request);
48: }
49: setValue(fieldValue);
50:
51: return super .doStartTag();
52:
53: }
54:
55: public int doEndTag() throws JspException {
56: setValue(null);
57: return super.doEndTag();
58: }
59:
60: }
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