org.zkoss.xel.zel

Class ELXelExpression

java.lang.Object

org.zkoss.xel.zel.ELXelExpression

All Implemented Interfaces:

java.io.Serializable, Expression, ExpressionX

Direct Known Subclasses:

BindXelExpression

public class ELXelExpression
extends java.lang.Object
implements ExpressionX, java.io.Serializable

An XEL Expression that is based on ZEL ValueExpression.

Since:

6.0.0

Author:

henrichen

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ELXelExpression.ValueReferenceImpl

Field Summary

Fields

Modifier and Type	Field and Description
protected ValueExpression	_expr

Constructor Summary

Constructors

Constructor and Description
ELXelExpression(ValueExpression expr)

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.Object	evaluate(XelContext xelc) Evaluates an expression that was previously prepared.
java.lang.String	getExpressionString() Returns the expression in String form.
java.lang.Class	getType(XelContext xelc) Returns the result type of this expression.
ValueReference	getValueReference(XelContext xelc) Returns the target bean and field name of this expression.
boolean	isReadOnly(XelContext xelc) Returns whether this is a read only (cannot setValue) expression.
protected ELContext	newELContext(XelContext xelc)
void	setValue(XelContext xelc, java.lang.Object value) Set values into the property resolved by this expression.

Methods inherited from class java.lang.Object

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

Field Detail

_expr

protected final ValueExpression _expr

Constructor Detail

ELXelExpression

public ELXelExpression(ValueExpression expr)

Method Detail

evaluate

public java.lang.Object evaluate(XelContext xelc)
                          throws XelException

Description copied from interface: Expression

Evaluates an expression that was previously prepared.

Specified by:

evaluate in interface Expression

Throws:

XelException

isReadOnly

public boolean isReadOnly(XelContext xelc)
                   throws XelException

Description copied from interface: ExpressionX

Returns whether this is a read only (cannot setValue) expression.

Specified by:

isReadOnly in interface ExpressionX

Parameters:

xelc - the evaluation context

Returns:

whether this is a read only (cannot setValue) expression.

Throws:

XelException

setValue

public void setValue(XelContext xelc,
            java.lang.Object value)
              throws XelException

Description copied from interface: ExpressionX

Set values into the property resolved by this expression.

Specified by:

setValue in interface ExpressionX

Parameters:

xelc - the evaluation context

value - the value to be set into the property resolved by this expression

Throws:

XelException

getExpressionString

public java.lang.String getExpressionString()

Description copied from interface: ExpressionX

Returns the expression in String form.

Specified by:

getExpressionString in interface ExpressionX

Returns:

the expression in String form.

getType

public java.lang.Class getType(XelContext xelc)

Description copied from interface: ExpressionX

Returns the result type of this expression.

Specified by:

getType in interface ExpressionX

Parameters:

xelc - the evaluation context

Returns:

the result type of this expression.

getValueReference

public ValueReference getValueReference(XelContext xelc)

Description copied from interface: ExpressionX

Returns the target bean and field name of this expression.

Specified by:

getValueReference in interface ExpressionX

Parameters:

xelc - the evaluation context

Returns:

the target bean and field name of this expression.

newELContext

protected ELContext newELContext(XelContext xelc)