/*
* $Id: HiddenTag.java 471754 2006-11-06 14:55:09Z husted $
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.struts.taglib.html;
import org.apache.struts.taglib.TagUtils;
import javax.servlet.jsp.JspException;
/**
* Custom tag for input fields of type "hidden".
*
* @version $Rev: 471754 $ $Date: 2004-10-16 12:38:42 -0400 (Sat, 16 Oct 2004)
* $
*/
public class HiddenTag extends BaseFieldTag {
// ------------------------------------------------------------- Properties
/**
* Should the value of this field also be rendered to the response?
*/
protected boolean write = false;
// ----------------------------------------------------------- Constructors
/**
* Construct a new instance of this tag.
*/
public HiddenTag() {
super();
this.type = "hidden";
}
public boolean getWrite() {
return (this.write);
}
public void setWrite(boolean write) {
this.write = write;
}
// --------------------------------------------------------- Public Methods
/**
* Generate the required input tag, followed by the optional rendered
* text. Support for <code>write</code> property since Struts 1.1.
*
* @throws JspException if a JSP exception has occurred
*/
public int doStartTag() throws JspException {
// Render the <html:input type="hidden"> tag as before
super.doStartTag();
// Is rendering the value separately requested?
if (!write) {
return (EVAL_BODY_TAG);
}
// Calculate the value to be rendered separately
// * @since Struts 1.1
String results = null;
if (value != null) {
results = TagUtils.getInstance().filter(value);
} else {
Object value =
TagUtils.getInstance().lookup(pageContext, name, property, null);
if (value == null) {
results = "";
} else {
results = TagUtils.getInstance().filter(value.toString());
}
}
TagUtils.getInstance().write(pageContext, results);
return (EVAL_BODY_TAG);
}
/**
* Release any acquired resources.
*/
public void release() {
super.release();
write = false;
}
}