org.zkoss.zkmax.xel.ognl
Class OGNLFactory

java.lang.Object
  org.zkoss.zkmax.xel.ognl.OGNLFactory

All Implemented Interfaces:

ExpressionFactory

public class OGNLFactory
extends java.lang.Object
implements ExpressionFactory

An implementation based on OGNL.

Available in ZK EE

Note: OGNL is not completely compatible with JSP EL.

See also OGNL website.

Since:

3.0.0

Author:

tomyeh

Field Summary

Fields inherited from interface org.zkoss.xel.ExpressionFactory

FEATURE_CLASS, FEATURE_FUNCTION

Constructor Summary

OGNLFactory()

Method Summary

java.lang.Object	evaluate(XelContext ctx, java.lang.String expression, java.lang.Class expectedType) Evaluates an expression.
static java.util.Map	getContext(XelContext ctx) Returns an OGNL context for the specified XEL context.
static java.lang.Object	getRoot(XelContext ctx) Returns the root object.
boolean	isSupported(int feature) Returns whether an feature is supported.
Expression	parseExpression(XelContext ctx, java.lang.String expression, java.lang.Class expectedType) Prepares (a.k.a., compiles) an expression.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

OGNLFactory

public OGNLFactory()

Method Detail

isSupported

public boolean isSupported(int feature)

Description copied from interface: ExpressionFactory

Returns whether an feature is supported.

Specified by:

isSupported in interface ExpressionFactory

Parameters:

feature - which feature to query. It can be a combination of ExpressionFactory.FEATURE_FUNCTION and ExpressionFactory.FEATURE_CLASS.

parseExpression

public Expression parseExpression(XelContext ctx,
                                  java.lang.String expression,
                                  java.lang.Class expectedType)
                           throws XelException

Description copied from interface: ExpressionFactory

Prepares (a.k.a., compiles) an expression.

Specified by:

parseExpression in interface ExpressionFactory

Parameters:

ctx - the context information to prepare the expression. It can be null, in which case no functions are supported for this invocation.

expression - the expression to be evaluated.

expectedType - the expected type of the result of the evaluation

Throws:

XelException

evaluate

public java.lang.Object evaluate(XelContext ctx,
                                 java.lang.String expression,
                                 java.lang.Class expectedType)
                          throws XelException

Description copied from interface: ExpressionFactory

Evaluates an expression.

Specified by:

evaluate in interface ExpressionFactory

Parameters:

ctx - the context information to evaluate an expression. It can be null, in which case no functions are supported for this invocation.

expression - the expression to be evaluated. Note: the expression is enclosed with ${ and }, regardless of what implementation is used.

expectedType - the expected type of the result of the evaluation

Throws:

XelException

getContext

public static java.util.Map getContext(XelContext ctx)

Returns an OGNL context for the specified XEL context.

getRoot

public static java.lang.Object getRoot(XelContext ctx)

Returns the root object.