Class ValueRef.NullValueRef

java.lang.Object

org.springframework.expression.spel.ast.ValueRef.NullValueRef

All Implemented Interfaces:

ValueRef

Enclosing interface:

ValueRef

public static class ValueRef.NullValueRef
extends Object
implements ValueRef

A ValueRef for the null value.

Since:

3.2

Author:

Andy Clement

Nested Class Summary

Nested classes/interfaces inherited from interface ValueRef

ValueRef.NullValueRef, ValueRef.TypedValueHolderValueRef

Constructor Summary

Constructors

Constructor	Description
NullValueRef()

Method Summary

Modifier and Type	Method	Description
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(@Nullable Object newValue)	Sets the value this ValueRef points to, it should not require expression component re-evaluation.

Methods inherited from class Object

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

Constructor Details

NullValueRef

public NullValueRef()

Method Details

getValue

public TypedValue getValue()

Description copied from interface: ValueRef

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

Specified by:

getValue in interface ValueRef

Returns:

the value

setValue

public void setValue(@Nullable Object newValue)

Description copied from interface: ValueRef

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

Specified by:

setValue in interface ValueRef

Parameters:

newValue - the new value

isWritable

public boolean isWritable()

Description copied from interface: ValueRef

Indicates whether calling setValue(Object) is supported.

Specified by:

isWritable in interface ValueRef

Returns:

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