ValueRef.NullValueRef (Spring Framework 4.3.30.RELEASE API)

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.

Nested Class Summary
- Nested classes/interfaces inherited from interface org.springframework.expression.spel.ast.ValueRef
  ValueRef.NullValueRef, ValueRef.TypedValueHolderValueRef

Constructor Summary
Constructors
Constructor Description
NullValueRef()

Method Summary

All Methods Instance Methods Concrete Methods
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(Object newValue)`	Sets the value this ValueRef points to, it should not require expression component re-evaluation.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - NullValueRef
```
public NullValueRef()
```
- Method Detail
  - 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(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.