/*
* $Id: ELDefinitionTag.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.DefinitionTag;
import org.apache.strutsel.taglib.utils.EvalHelper;
import javax.servlet.jsp.JspException;
/**
* This is the tag handler for <tiles:definition>, which defines a tiles
* (or template / component). Definition is put in requested context and can
* be used in <tiles:insert>. <p> This class is a subclass of the class
* <code>org.apache.struts.taglib.tiles.DefinitionTag</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 ELDefinitionTag extends DefinitionTag {
/**
* Instance variable mapped to "id" tag attribute. (Mapping set in
* associated BeanInfo class.)
*/
private String idExpr;
/**
* Instance variable mapped to "scope" tag attribute. (Mapping set in
* associated BeanInfo class.)
*/
private String scopeExpr;
/**
* Instance variable mapped to "template" tag attribute. (Mapping set in
* associated BeanInfo class.)
*/
private String templateExpr;
/**
* Instance variable mapped to "page" tag attribute. (Mapping set in
* associated BeanInfo class.)
*/
private String pageExpr;
/**
* Instance variable mapped to "role" tag attribute. (Mapping set in
* associated BeanInfo class.)
*/
private String roleExpr;
/**
* Instance variable mapped to "extends" tag attribute. (Mapping set in
* associated BeanInfo class.)
*/
private String extendsExpr;
/**
* Getter method for "id" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public String getIdExpr() {
return (idExpr);
}
/**
* Getter method for "scope" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public String getScopeExpr() {
return (scopeExpr);
}
/**
* Getter method for "template" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public String getTemplateExpr() {
return (templateExpr);
}
/**
* Getter method for "page" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public String getPageExpr() {
return (pageExpr);
}
/**
* Getter method for "role" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public String getRoleExpr() {
return (roleExpr);
}
/**
* Getter method for "extends" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public String getExtendsExpr() {
return (extendsExpr);
}
/**
* Setter method for "id" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public void setIdExpr(String idExpr) {
this.idExpr = idExpr;
}
/**
* Setter method for "scope" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public void setScopeExpr(String scopeExpr) {
this.scopeExpr = scopeExpr;
}
/**
* Setter method for "template" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public void setTemplateExpr(String templateExpr) {
this.templateExpr = templateExpr;
}
/**
* Setter method for "page" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public void setPageExpr(String pageExpr) {
this.pageExpr = pageExpr;
}
/**
* Setter method for "role" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public void setRoleExpr(String roleExpr) {
this.roleExpr = roleExpr;
}
/**
* Setter method for "extends" tag attribute. (Mapping set in associated
* BeanInfo class.)
*/
public void setExtendsExpr(String extendsExpr) {
this.extendsExpr = extendsExpr;
}
/**
* Resets attribute values for tag reuse.
*/
public void release() {
super.release();
setIdExpr(null);
setScopeExpr(null);
setTemplateExpr(null);
setPageExpr(null);
setRoleExpr(null);
setExtendsExpr(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("scope", getScopeExpr(), this, pageContext)) != null) {
setScope(string);
}
if ((string =
EvalHelper.evalString("template", getTemplateExpr(), this,
pageContext)) != null) {
setTemplate(string);
}
if ((string =
EvalHelper.evalString("page", getPageExpr(), this, pageContext)) != null) {
setPage(string);
}
if ((string =
EvalHelper.evalString("role", getRoleExpr(), this, pageContext)) != null) {
setRole(string);
}
if ((string =
EvalHelper.evalString("extends", getExtendsExpr(), this,
pageContext)) != null) {
setExtends(string);
}
}
}