org.zkoss.zk.xel.Evaluators Maven / Gradle / Ivy
/* Evaluators.java
Purpose:
Description:
History:
Mon Aug 25 14:06:17 2008, Created by tomyeh
Copyright (C) 2008 Potix Corporation. All Rights Reserved.
{{IS_RIGHT
This program is distributed under LGPL Version 2.1 in the hope that
it will be useful, but WITHOUT ANY WARRANTY.
}}IS_RIGHT
*/
package org.zkoss.zk.xel;
import org.zkoss.lang.Classes;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.Page;
/**
* Utilities of evaluation.
*
* @author tomyeh
* @since 3.5.0
*/
public class Evaluators {
/** Evaluates the specified expression (which might or might not
* contain ${).
*
* @param comp the component to represent the self variable
*/
public static Object evaluate(Evaluator eval, Component comp,
String expr, Class expectedClass) {
if (expr != null && expr.indexOf("${") >= 0) {
return eval.evaluate(comp, eval.parseExpression(expr, expectedClass));
} else {
return Classes.coerce(expectedClass, expr);
}
}
/** Evaluates the specified expression (which might or might not
* contain ${).
*
* @param page the page to represent the self variable
*/
public static Object evaluate(Evaluator eval, Page page,
String expr, Class expectedClass) {
if (expr != null && expr.indexOf("${") >= 0) {
return eval.evaluate(page, eval.parseExpression(expr, expectedClass));
} else {
return Classes.coerce(expectedClass, expr);
}
}
}