/*
* $Id: ELStrutsTag.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.StrutsTag;
import org.apache.strutsel.taglib.utils.EvalHelper;
import javax.servlet.jsp.JspException;
/**
* Define a scripting variable that exposes the requested Struts internal
* configuraton object. <p> This class is a subclass of the class
* <code>org.apache.struts.taglib.bean.StrutsTag</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 ELStrutsTag extends StrutsTag {
/**
* Instance variable mapped to "id" tag attribute. (Mapping set in
* associated BeanInfo class.)
*/
private String idExpr;
/**
* Instance variable mapped to "formBean" tag attribute. (Mapping set in
* associated BeanInfo class.)
*/
private String formBeanExpr;
/**
* Instance variable mapped to "forward" tag attribute. (Mapping set in
* associated BeanInfo class.)
*/
private String forwardExpr;
/**
* Instance variable mapped to "mapping" tag attribute. (Mapping set in
* associated BeanInfo class.)
*/
private String mappingExpr;
/**
* Getter method for "id" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public String getIdExpr() {
return (idExpr);
}
/**
* Getter method for "formBean" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public String getFormBeanExpr() {
return (formBeanExpr);
}
/**
* Getter method for "forward" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public String getForwardExpr() {
return (forwardExpr);
}
/**
* Getter method for "mapping" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public String getMappingExpr() {
return (mappingExpr);
}
/**
* Setter method for "id" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public void setIdExpr(String idExpr) {
this.idExpr = idExpr;
}
/**
* Setter method for "formBean" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public void setFormBeanExpr(String formBeanExpr) {
this.formBeanExpr = formBeanExpr;
}
/**
* Setter method for "forward" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public void setForwardExpr(String forwardExpr) {
this.forwardExpr = forwardExpr;
}
/**
* Setter method for "mapping" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public void setMappingExpr(String mappingExpr) {
this.mappingExpr = mappingExpr;
}
/**
* Resets attribute values for tag reuse.
*/
public void release() {
super.release();
setIdExpr(null);
setFormBeanExpr(null);
setForwardExpr(null);
setMappingExpr(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("formBean", getFormBeanExpr(), this,
pageContext)) != null) {
setFormBean(string);
}
if ((string =
EvalHelper.evalString("forward", getForwardExpr(), this,
pageContext)) != null) {
setForward(string);
}
if ((string =
EvalHelper.evalString("mapping", getMappingExpr(), this,
pageContext)) != null) {
setMapping(string);
}
}
}