Package io.ultreia.java4all.util

Class SingletonSupplier<O>

java.lang.Object

io.ultreia.java4all.util.SingletonSupplier<O>

All Implemented Interfaces:

Supplier<O>

public class SingletonSupplier<O>
extends Object
implements Supplier<O>

Get a Supplier with a cached value acting as a singleton.

To remove cached value, use method clear().

Created by tchemit on 28/09/17.

Author:

Tony Chemit - dev@tchemit.fr

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	SingletonSupplier(Supplier<O> supplier, boolean requireNonNull)

Method Summary

Modifier and Type	Method	Description
Optional<O>	clear()
O	get()
protected O	load()
static <O> SingletonSupplier<O>	of(Supplier<O> supplier)
static <O> SingletonSupplier<O>	of(Supplier<O> supplier, boolean requireNonNull)
void	setSupplier(Supplier<O> supplier)
boolean	withValue()

Methods inherited from class java.lang.Object

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

Constructor Detail

SingletonSupplier

protected SingletonSupplier(Supplier<O> supplier,
                            boolean requireNonNull)

Method Detail

of

public static <O> SingletonSupplier<O> of(Supplier<O> supplier)

of

public static <O> SingletonSupplier<O> of(Supplier<O> supplier,
                                          boolean requireNonNull)

get

public O get()

Specified by:

get in interface Supplier<O>

setSupplier

public void setSupplier(Supplier<O> supplier)

clear

public Optional<O> clear()

withValue

public boolean withValue()

load

protected O load()