de.caff.generics.util

Class MutableRef<T>

java.lang.Object

de.caff.generics.util.MutableRef<T>

Type Parameters:

T - type of object kept by this reference

All Implemented Interfaces:

IReference<T>

public class MutableRef<T>
extends java.lang.Object
implements IReference<T>

A mutable reference to an object. This is sometimes useful to return a value from lambdas, although it is usually considered a hack. It is not thread-safe!

Since:

October 10, 2022

Author:

Rammi

Field Summary

Fields inherited from interface de.caff.generics.util.IReference

NULL_REF

Constructor Summary

Constructors

Constructor and Description
MutableRef() Constructor creating a null reference
MutableRef(T reference) Constructor.

Method Summary

Modifier and Type	Method and Description
T	get() Get the referenced object.
T	require() Require that the reference value is set to a non-null value.
void	set(T reference) Set the reference.

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.caff.generics.util.IReference

hard, isNull, nullRef, soft, weak

Constructor Detail

MutableRef

public MutableRef()

Constructor creating a null reference

MutableRef

public MutableRef(@Nullable
                  T reference)

Constructor.

Parameters:

reference - referenced object

Method Detail

set

public void set(@Nullable
                T reference)

Set the reference.

Parameters:

reference - referenced object

get

@Nullable
public T get()

Description copied from interface: IReference

Get the referenced object. Depending on the implementation this might return null if the referenced object is garbage collected or this is a null reference.

Specified by:

get in interface IReference<T>

Returns:

referenced object, or null

require

@NotNull
public T require()

Require that the reference value is set to a non-null value.

Returns:

referenced value