程序包 cn.taketoday.expression.spel.ast

类 ValueRef.NullValueRef

java.lang.Object

cn.taketoday.expression.spel.ast.ValueRef.NullValueRef

所有已实现的接口:

ValueRef

封闭接口:

ValueRef

public static class ValueRef.NullValueRef
extends Object
implements ValueRef

A ValueRef for the null value.

嵌套类概要

从接口继承的嵌套类/接口 cn.taketoday.expression.spel.ast.ValueRef

ValueRef.NullValueRef, ValueRef.TypedValueHolderValueRef

构造器概要

构造器

构造器	说明
NullValueRef()

方法概要

修饰符和类型	方法	说明
TypedValue	getValue()	Returns the value this ValueRef points to, it should not require expression component re-evaluation.
boolean	isWritable()	Indicates whether calling setValue(Object) is supported.
void	setValue(Object newValue)	Sets the value this ValueRef points to, it should not require expression component re-evaluation.

从类继承的方法 java.lang.Object

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

构造器详细资料

NullValueRef

public NullValueRef()

方法详细资料

getValue

public TypedValue getValue()

从接口复制的说明: ValueRef

Returns the value this ValueRef points to, it should not require expression component re-evaluation.

指定者:

getValue 在接口中 ValueRef

返回:

the value

setValue

public void setValue(@Nullable
 Object newValue)

从接口复制的说明: ValueRef

Sets the value this ValueRef points to, it should not require expression component re-evaluation.

指定者:

setValue 在接口中 ValueRef

参数:

newValue - the new value

isWritable

public boolean isWritable()

从接口复制的说明: ValueRef

Indicates whether calling setValue(Object) is supported.

指定者:

isWritable 在接口中 ValueRef

返回:

true if setValue() is supported for this value reference.