/**
* Copyright 2005-2016 hdiv.org
*
* Licensed 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.hdiv.strutsel.taglib.html;
import javax.servlet.jsp.JspException;
import org.apache.strutsel.taglib.utils.EvalHelper;
import org.hdiv.taglib.html.OptionsCollectionTagHDIV;
/**
* Tag for creating multiple <select> options from a collection. The collection may be part of the enclosing form, or may be
* independent of the form. Each element of the collection must expose a 'label' and a 'value', the property names of which are configurable
* by attributes of this tag.
* <p>
* The collection may be an array of objects, a Collection, an Enumeration, an Iterator, or a Map.
* <p>
* <b>NOTE</b> - This tag requires a Java2 (JDK 1.2 or later) platform.
* <p>
* This class is a subclass of the class <code>org.hdiv.taglib.html.OptionsCollectionTagHDIV</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.
*
* @author Gorka Vicente
* @since HDIV 2.0
*/
public class ELOptionsCollectionTagHDIV extends OptionsCollectionTagHDIV {
/**
* Instance variable mapped to "filter" tag attribute. (Mapping set in associated BeanInfo class.)
*/
private String filterExpr;
/**
* Instance variable mapped to "label" tag attribute. (Mapping set in associated BeanInfo class.)
*/
private String labelExpr;
/**
* Instance variable mapped to "name" tag attribute. (Mapping set in associated BeanInfo class.)
*/
private String nameExpr;
/**
* Instance variable mapped to "property" tag attribute. (Mapping set in associated BeanInfo class.)
*/
private String propertyExpr;
/**
* Instance variable mapped to "style" tag attribute. (Mapping set in associated BeanInfo class.)
*/
private String styleExpr;
/**
* Instance variable mapped to "styleClass" tag attribute. (Mapping set in associated BeanInfo class.)
*/
private String styleClassExpr;
/**
* Instance variable mapped to "value" tag attribute. (Mapping set in associated BeanInfo class.)
*/
private String valueExpr;
/**
* Getter method for "filter" tag attribute. (Mapping set in associated BeanInfo class.)
*/
public String getFilterExpr() {
return (filterExpr);
}
/**
* Getter method for "label" tag attribute. (Mapping set in associated BeanInfo class.)
*/
public String getLabelExpr() {
return (labelExpr);
}
/**
* Getter method for "name" tag attribute. (Mapping set in associated BeanInfo class.)
*/
public String getNameExpr() {
return (nameExpr);
}
/**
* Getter method for "property" tag attribute. (Mapping set in associated BeanInfo class.)
*/
public String getPropertyExpr() {
return (propertyExpr);
}
/**
* Getter method for "style" tag attribute. (Mapping set in associated BeanInfo class.)
*/
public String getStyleExpr() {
return (styleExpr);
}
/**
* Getter method for "styleClass" tag attribute. (Mapping set in associated BeanInfo class.)
*/
public String getStyleClassExpr() {
return (styleClassExpr);
}
/**
* Getter method for "value" tag attribute. (Mapping set in associated BeanInfo class.)
*/
public String getValueExpr() {
return (valueExpr);
}
/**
* Setter method for "filter" tag attribute. (Mapping set in associated BeanInfo class.)
*/
public void setFilterExpr(String filterExpr) {
this.filterExpr = filterExpr;
}
/**
* Setter method for "label" tag attribute. (Mapping set in associated BeanInfo class.)
*/
public void setLabelExpr(String labelExpr) {
this.labelExpr = labelExpr;
}
/**
* Setter method for "name" tag attribute. (Mapping set in associated BeanInfo class.)
*/
public void setNameExpr(String nameExpr) {
this.nameExpr = nameExpr;
}
/**
* Setter method for "property" tag attribute. (Mapping set in associated BeanInfo class.)
*/
public void setPropertyExpr(String propertyExpr) {
this.propertyExpr = propertyExpr;
}
/**
* Setter method for "style" tag attribute. (Mapping set in associated BeanInfo class.)
*/
public void setStyleExpr(String styleExpr) {
this.styleExpr = styleExpr;
}
/**
* Setter method for "styleClass" tag attribute. (Mapping set in associated BeanInfo class.)
*/
public void setStyleClassExpr(String styleClassExpr) {
this.styleClassExpr = styleClassExpr;
}
/**
* Setter method for "value" tag attribute. (Mapping set in associated BeanInfo class.)
*/
public void setValueExpr(String valueExpr) {
this.valueExpr = valueExpr;
}
/**
* Resets attribute values for tag reuse.
*/
public void release() {
super.release();
setFilterExpr(null);
setLabelExpr(null);
setNameExpr(null);
setPropertyExpr(null);
setStyleExpr(null);
setStyleClassExpr(null);
setValueExpr(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 ((bool = EvalHelper.evalBoolean("filter", getFilterExpr(), this, pageContext)) != null) {
setFilter(bool.booleanValue());
}
if ((string = EvalHelper.evalString("label", getLabelExpr(), this, pageContext)) != null) {
setLabel(string);
}
if ((string = EvalHelper.evalString("name", getNameExpr(), this, pageContext)) != null) {
setName(string);
}
if ((string = EvalHelper.evalString("property", getPropertyExpr(), this, pageContext)) != null) {
setProperty(string);
}
if ((string = EvalHelper.evalString("style", getStyleExpr(), this, pageContext)) != null) {
setStyle(string);
}
if ((string = EvalHelper.evalString("styleClass", getStyleClassExpr(), this, pageContext)) != null) {
setStyleClass(string);
}
// Note that in contrast to other elements which have "style" and
// "styleClass" attributes, this tag does not have a "styleId"
// attribute. This is because this produces the "id" attribute, which
// has to be unique document-wide, but this tag can generate more than
// one "option" element. Thus, the base tag, "OptionsCollectionTag"
// does not support this attribute.
if ((string = EvalHelper.evalString("value", getValueExpr(), this, pageContext)) != null) {
setValue(string);
}
}
}