org.zkoss.bind.sys

Interface BindEvaluatorX

All Superinterfaces:

org.zkoss.zk.xel.Evaluator, Serializable

All Known Implementing Classes:

BindEvaluatorXImpl

public interface BindEvaluatorX
extends org.zkoss.zk.xel.Evaluator

An extension of Evaluator to have more control to handle Binding via EL.

With BindEvaluatorX, you are allow to parse a Method expression or set value into property resolved by the provided expression.

Since:

6.0.0

Author:

henrichen

Method Summary

Modifier and Type	Method and Description
Class<?>	getType(BindContext ctx, org.zkoss.zk.ui.Component comp, org.zkoss.xel.ExpressionX expression) Returns the result type of the specified expression.
Object	getValue(BindContext ctx, org.zkoss.zk.ui.Component comp, org.zkoss.xel.ExpressionX expression) Sets the specified value to the property resolved from the specified expression.
org.zkoss.xel.ValueReference	getValueReference(BindContext ctx, org.zkoss.zk.ui.Component comp, org.zkoss.xel.ExpressionX expression) Returns the result reference of the specified expression.
boolean	isReadOnly(BindContext ctx, org.zkoss.zk.ui.Component comp, org.zkoss.xel.ExpressionX expression) Returns whether the specified expression a read only expression.
org.zkoss.xel.ExpressionX	parseExpressionX(BindContext ctx, String expression, Class<?> expectedType) Prepares the expressionX.
void	setValue(BindContext ctx, org.zkoss.zk.ui.Component comp, org.zkoss.xel.ExpressionX expression, Object value) Sets the specified value to the property resolved from the specified expression.

Methods inherited from interface org.zkoss.zk.xel.Evaluator

evaluate, evaluate, parseExpression

Method Detail

parseExpressionX

org.zkoss.xel.ExpressionX parseExpressionX(BindContext ctx,
                                           String expression,
                                           Class<?> expectedType)
                                    throws org.zkoss.xel.XelException

Prepares the expressionX.

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

setValue

void setValue(BindContext ctx,
              org.zkoss.zk.ui.Component comp,
              org.zkoss.xel.ExpressionX expression,
              Object value)
       throws org.zkoss.xel.XelException

Sets the specified value to the property resolved from the specified expression.

Parameters:

ctx - the scoped bind context of this operation

comp - the scoped component context of this operation

expression - the expression that will resolve a property

value - the value to be set into the resolved property

Throws:

org.zkoss.xel.XelException

getValue

Object getValue(BindContext ctx,
                org.zkoss.zk.ui.Component comp,
                org.zkoss.xel.ExpressionX expression)
         throws org.zkoss.xel.XelException

Sets the specified value to the property resolved from the specified expression.

Parameters:

ctx - the scoped bind context of this operation

comp - the scoped component context of this operation

expression - the expression that will resolve a property

Throws:

org.zkoss.xel.XelException

getType

Class<?> getType(BindContext ctx,
                 org.zkoss.zk.ui.Component comp,
                 org.zkoss.xel.ExpressionX expression)
          throws org.zkoss.xel.XelException

Returns the result type of the specified expression.

Parameters:

ctx - BindContext

comp - evaluation context

expression - the expression that will resolve a property

Throws:

org.zkoss.xel.XelException

getValueReference

org.zkoss.xel.ValueReference getValueReference(BindContext ctx,
                                               org.zkoss.zk.ui.Component comp,
                                               org.zkoss.xel.ExpressionX expression)
                                        throws org.zkoss.xel.XelException

Returns the result reference of the specified expression.

Parameters:

ctx - BindContext

comp - evaluation context

expression - the expression that will resolve a property

Throws:

org.zkoss.xel.XelException

isReadOnly

boolean isReadOnly(BindContext ctx,
                   org.zkoss.zk.ui.Component comp,
                   org.zkoss.xel.ExpressionX expression)
            throws org.zkoss.xel.XelException

Returns whether the specified expression a read only expression.

Parameters:

ctx - BindContext

comp - evaluation context

expression - the expression that will resolve a property

Returns:

whether the specified expression a read only expression.

Throws:

org.zkoss.xel.XelException