/*
* $Id: ELGetAttributeTag.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.GetAttributeTag;
import org.apache.strutsel.taglib.utils.EvalHelper;
import javax.servlet.jsp.JspException;
/**
* This is the tag handler for <tiles-el:get>, which gets content from
* the request scope and either includes the content or prints it, depending
* upon the value of the content's <code>direct</code> attribute. <p> This tag
* is intended to be compatible with the same tag from Templates (David
* Geary). Implementation extends InsertTag for facility (no so well). The
* only difference is the default value of attribute 'ignore', which is
* <code>true</code> for this tag (default behavior of David Geary's
* templates). <p> This class is a subclass of the class
* <code>org.apache.struts.taglib.tiles.GetAttributeTag</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 ELGetAttributeTag extends GetAttributeTag {
/**
* Instance variable mapped to "name" tag attribute. (Mapping set in
* associated BeanInfo class.)
*/
private String nameExpr;
/**
* Instance variable mapped to "ignore" tag attribute. (Mapping set in
* associated BeanInfo class.)
*/
private String ignoreExpr;
/**
* Instance variable mapped to "role" tag attribute. (Mapping set in
* associated BeanInfo class.)
*/
private String roleExpr;
/**
* Getter method for "name" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public String getNameExpr() {
return (nameExpr);
}
/**
* Getter method for "ignore" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public String getIgnoreExpr() {
return (ignoreExpr);
}
/**
* Getter method for "role" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public String getRoleExpr() {
return (roleExpr);
}
/**
* Setter method for "name" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public void setNameExpr(String nameExpr) {
this.nameExpr = nameExpr;
}
/**
* Setter method for "ignore" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public void setIgnoreExpr(String ignoreExpr) {
this.ignoreExpr = ignoreExpr;
}
/**
* Setter method for "role" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public void setRoleExpr(String roleExpr) {
this.roleExpr = roleExpr;
}
/**
* Resets attribute values for tag reuse.
*/
public void release() {
super.release();
setNameExpr(null);
setIgnoreExpr(null);
setRoleExpr(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;
Boolean bool = null;
if ((string =
EvalHelper.evalString("name", getNameExpr(), this, pageContext)) != null) {
setName(string);
}
if ((bool =
EvalHelper.evalBoolean("ignore", getIgnoreExpr(), this,
pageContext)) != null) {
setIgnore(bool.booleanValue());
}
if ((string =
EvalHelper.evalString("role", getRoleExpr(), this, pageContext)) != null) {
setRole(string);
}
}
}