/*
* $Id: ELResourceTag.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.bean;
import org.apache.struts.taglib.bean.ResourceTag;
import org.apache.strutsel.taglib.utils.EvalHelper;
import javax.servlet.jsp.JspException;
/**
* Define a scripting variable based on the contents of the specified web
* application resource. <p> This class is a subclass of the class
* <code>org.apache.struts.taglib.bean.ResourceTag</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 ELResourceTag extends ResourceTag {
/**
* Instance variable mapped to "id" tag attribute. (Mapping set in
* associated BeanInfo class.)
*/
private String idExpr;
/**
* Instance variable mapped to "input" tag attribute. (Mapping set in
* associated BeanInfo class.)
*/
private String inputExpr;
/**
* Instance variable mapped to "name" tag attribute. (Mapping set in
* associated BeanInfo class.)
*/
private String nameExpr;
/**
* Getter method for "id" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public String getIdExpr() {
return (idExpr);
}
/**
* Getter method for "input" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public String getInputExpr() {
return (inputExpr);
}
/**
* Getter method for "name" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public String getNameExpr() {
return (nameExpr);
}
/**
* Setter method for "id" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public void setIdExpr(String idExpr) {
this.idExpr = idExpr;
}
/**
* Setter method for "input" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public void setInputExpr(String inputExpr) {
this.inputExpr = inputExpr;
}
/**
* Setter method for "name" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public void setNameExpr(String nameExpr) {
this.nameExpr = nameExpr;
}
/**
* Resets attribute values for tag reuse.
*/
public void release() {
super.release();
setIdExpr(null);
setInputExpr(null);
setNameExpr(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 {
String string = null;
if ((string =
EvalHelper.evalString("id", getIdExpr(), this, pageContext)) != null) {
setId(string);
}
if ((string =
EvalHelper.evalString("input", getInputExpr(), this, pageContext)) != null) {
setInput(string);
}
if ((string =
EvalHelper.evalString("name", getNameExpr(), this, pageContext)) != null) {
setName(string);
}
}
}