org.zkoss.zk.xel
Interface Evaluator

All Superinterfaces:

java.io.Serializable

All Known Subinterfaces:

EvaluatorRef

All Known Implementing Classes:

SimpleEvaluator

public interface Evaluator
extends java.io.Serializable

A ZK specific expression builder that is based on XEL.

Since:

3.0.0

Author:

tomyeh

Method Summary

java.lang.Object	evaluate(Component comp, org.zkoss.xel.Expression expression) Evaluates the expression.
java.lang.Object	evaluate(Page page, org.zkoss.xel.Expression expression) Evaluates the expression.
org.zkoss.xel.Expression	parseExpression(java.lang.String expression, java.lang.Class expectedType) Prepares the expression.

Method Detail

parseExpression

org.zkoss.xel.Expression parseExpression(java.lang.String expression,
                                         java.lang.Class expectedType)
                                         throws org.zkoss.xel.XelException

Prepares the expression.

Parameters:

expression - the expression to be prepared for being evaluated later.

expectedType - the expected type of the result of the evaluation

Throws:

org.zkoss.xel.XelException

evaluate

java.lang.Object evaluate(Page page,
                          org.zkoss.xel.Expression expression)
                          throws org.zkoss.xel.XelException

Evaluates the expression.

Parameters:

page - the page, or null to ignore

Throws:

org.zkoss.xel.XelException

evaluate

java.lang.Object evaluate(Component comp,
                          org.zkoss.xel.Expression expression)
                          throws org.zkoss.xel.XelException

Evaluates the expression.

Parameters:

comp - the component, or null to ignore

Throws:

org.zkoss.xel.XelException