org.zkoss.bind.impl

Class PropertyExpression

java.lang.Object

org.zkoss.bind.impl.PropertyExpression

All Implemented Interfaces:

java.io.Serializable, Expression, ExpressionX

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

An implementation of component property expression to evaluate it with a reflection method call instead of EL resolving.

Note that this class is used for Data Binding internal only

Since:

8.0.0

Author:

jumperchen

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
PropertyExpression(Component cmp, java.lang.String field)

Method Summary

Modifier and Type	Method and Description
java.lang.Object	evaluate(XelContext ctx) 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 ctx) Returns whether this is a read only (cannot setValue) expression.
void	setValue(XelContext ctx, 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

Constructor Detail

PropertyExpression

public PropertyExpression(Component cmp,
                          java.lang.String field)

Method Detail

evaluate

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

Description copied from interface: ExpressionX

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

Specified by:

isReadOnly in interface ExpressionX

Parameters:

ctx - the evaluation context

Returns:

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

Throws:

XelException

setValue

public void setValue(XelContext ctx,
                     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:

ctx - 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.