/*
* $Id: ELInitDefinitionsTag.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.tiles;
import org.apache.struts.tiles.taglib.InitDefinitionsTag;
import org.apache.strutsel.taglib.utils.EvalHelper;
import javax.servlet.jsp.JspException;
/**
* Init definitions factory. <p> This class is a subclass of the class
* <code>org.apache.struts.taglib.tiles.InitDefinitionsTag</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 ELInitDefinitionsTag extends InitDefinitionsTag {
/**
* Instance variable mapped to "file" tag attribute. (Mapping set in
* associated BeanInfo class.)
*/
private String fileExpr;
/**
* Instance variable mapped to "classname" tag attribute. (Mapping set in
* associated BeanInfo class.)
*/
private String classnameExpr;
/**
* Getter method for "file" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public String getFileExpr() {
return (fileExpr);
}
/**
* Getter method for "classname" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public String getClassnameExpr() {
return (classnameExpr);
}
/**
* Setter method for "file" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public void setFileExpr(String fileExpr) {
this.fileExpr = fileExpr;
}
/**
* Setter method for "classname" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public void setClassnameExpr(String classnameExpr) {
this.classnameExpr = classnameExpr;
}
/**
* Resets attribute values for tag reuse.
*/
public void release() {
super.release();
setFileExpr(null);
setClassnameExpr(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("file", getFileExpr(), this, pageContext)) != null) {
setFile(string);
}
if ((string =
EvalHelper.evalString("classname", getClassnameExpr(), this,
pageContext)) != null) {
setClassname(string);
}
}
}