/*
* The contents of this file are subject to the terms
* of the Common Development and Distribution License
* (the "License"). You may not use this file except
* in compliance with the License.
*
* You can obtain a copy of the license at
* glassfish/bootstrap/legal/CDDLv1.0.txt or
* https://glassfish.dev.java.net/public/CDDLv1.0.html.
* See the License for the specific language governing
* permissions and limitations under the License.
*
* When distributing Covered Code, include this CDDL
* HEADER in each file and include the License file at
* glassfish/bootstrap/legal/CDDLv1.0.txt. If applicable,
* add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your
* own identifying information: Portions Copyright [yyyy]
* [name of copyright owner]
*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
*
* Portions Copyright Apache Software Foundation.
*/
package org.apache.taglibs.standard.tag.common.fmt;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspTagException;
import javax.servlet.jsp.tagext.BodyTagSupport;
import javax.servlet.jsp.tagext.Tag;
import org.apache.taglibs.standard.resources.Resources;
/**
* Support for tag handlers for <param>, the message argument
* subtag in JSTL 1.0 which supplies an argument for parametric replacement
* to its parent <message> tag.
*
* @see MessageSupport
* @author Jan Luehe
*/
public abstract class ParamSupport extends BodyTagSupport {
//*********************************************************************
// Protected state
protected Object value; // 'value' attribute
protected boolean valueSpecified; // status
//*********************************************************************
// Constructor and initialization
public ParamSupport() {
super();
init();
}
private void init() {
value = null;
valueSpecified = false;
}
//*********************************************************************
// Tag logic
// Supply our value to our parent <fmt:message> tag
public int doEndTag() throws JspException {
Tag t = findAncestorWithClass(this, MessageSupport.class);
if (t == null) {
throw new JspTagException(Resources.getMessage(
"PARAM_OUTSIDE_MESSAGE"));
}
MessageSupport parent = (MessageSupport) t;
/*
* Get argument from 'value' attribute or body, as appropriate, and
* add it to enclosing <fmt:message> tag, even if it is null or equal
* to "".
*/
Object input = null;
// determine the input by...
if (valueSpecified) {
// ... reading 'value' attribute
input = value;
} else {
// ... retrieving and trimming our body (TLV has ensured that it's
// non-empty)
input = bodyContent.getString().trim();
}
parent.addParam(input);
return EVAL_PAGE;
}
// Releases any resources we may have (or inherit)
public void release() {
init();
}
}