org.zkoss.zk.xel

Interface Evaluator

All Superinterfaces:

java.io.Serializable

All Known Subinterfaces:

BindEvaluatorX, EvaluatorRef

All Known Implementing Classes:

BindEvaluatorXImpl, BindEvaluatorXImplEx, 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

Modifier and Type	Method and Description
java.lang.Object	evaluate(Component comp, Expression expression) Evaluates the expression.
java.lang.Object	evaluate(Page page, Expression expression) Evaluates the expression.
Expression	parseExpression(java.lang.String expression, java.lang.Class<?> expectedType) Prepares the expression.

Method Detail

parseExpression

Expression parseExpression(java.lang.String expression,
                           java.lang.Class<?> expectedType)
                    throws 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:

XelException

evaluate

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

Evaluates the expression.

Parameters:

page - the page, or null to ignore

Throws:

XelException

evaluate

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

Evaluates the expression.

Parameters:

comp - the component, or null to ignore

Throws:

XelException