/*
* $Id: ELHtmlTag.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.strutsel.taglib.html;
import org.apache.struts.taglib.html.HtmlTag;
import org.apache.strutsel.taglib.utils.EvalHelper;
import javax.servlet.jsp.JspException;
/**
* Renders an HTML <html> element with appropriate language attributes if
* there is a current Locale available in the user's session. <p> This class
* is a subclass of the class <code>org.apache.struts.taglib.html.HtmlTag</code>
* which provides most of the described functionality. This subclass allows
* all attribute values to be specified as expressions utilizing the
* JavaServer Pages Standard Library expression language.
*
* @version $Rev: 471754 $
*/
public class ELHtmlTag extends HtmlTag {
/**
* Instance variable mapped to "lang" tag attribute. (Mapping set in
* associated BeanInfo class.)
*/
private String langExpr;
/**
* Instance variable mapped to "xhtml" tag attribute. (Mapping set in
* associated BeanInfo class.)
*/
private String xhtmlExpr;
/**
* Getter method for "lang" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public String getLangExpr() {
return (langExpr);
}
/**
* Getter method for "xhtml" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public String getXhtmlExpr() {
return (xhtmlExpr);
}
/**
* Setter method for "lang" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public void setLangExpr(String langExpr) {
this.langExpr = langExpr;
}
/**
* Setter method for "xhtml" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public void setXhtmlExpr(String xhtmlExpr) {
this.xhtmlExpr = xhtmlExpr;
}
/**
* Resets attribute values for tag reuse.
*/
public void release() {
super.release();
setLangExpr(null);
setXhtmlExpr(null);
}
/**
* Process the start tag.
*
* @throws JspException if a JSP exception has occurred
*/
public int doStartTag() throws JspException {
evaluateExpressions();
return (super.doStartTag());
}
/**
* Processes all attribute values which use the JSTL expression evaluation
* engine to determine their values.
*
* @throws JspException if a JSP exception has occurred
*/
private void evaluateExpressions()
throws JspException {
Boolean bool = null;
String string = null;
if ((bool =
EvalHelper.evalBoolean("lang", getLangExpr(), this, pageContext)) != null) {
setLang(bool.booleanValue());
}
if ((bool =
EvalHelper.evalBoolean("xhtml", getXhtmlExpr(), this,
pageContext)) != null) {
setXhtml(bool.booleanValue());
}
}
}