Package com.ulisesbocchio.jasyptspringboot.util

Class Singleton<R>

java.lang.Object

com.ulisesbocchio.jasyptspringboot.util.Singleton<R>

All Implemented Interfaces:

Supplier<R>

public final class Singleton<R>
extends Object
implements Supplier<R>

Singleton initializer class that uses an internal supplier to supply the singleton instance. The supplier originally checks whether the instanceSupplier has been initialized or not, but after initialization the instance supplier is changed to avoid extra logic execution.

Version:

$Id: $Id

Author:

Sergio.U.Bocchio

Constructor Summary

Constructors

Constructor	Description
Singleton(Supplier<R> original)	Constructor for Singleton.

Method Summary

Modifier and Type	Method	Description
static <T,U,R> Singleton<R>	from(BiFunction<T,U,R> original, T arg0, U arg1)	from.
static <T,R> Singleton<R>	from(Function<T,R> original, T arg0)	from.
static <R> Singleton<R>	from(Supplier<R> original)	from.
static <T,U,R> Singleton<R>	fromLazy(BiFunction<T,U,R> original, Supplier<T> arg0Supplier, Supplier<U> arg1Supplier)	fromLazy.
static <T,R> Singleton<R>	fromLazy(Function<T,R> original, Supplier<T> arg0Supplier)	fromLazy.
R	get()

Methods inherited from class java.lang.Object

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

Constructor Detail

Singleton

public Singleton(Supplier<R> original)

Constructor for Singleton.

Parameters:

original - a Supplier object

Method Detail

from

public static <R> Singleton<R> from(Supplier<R> original)

from.

Type Parameters:

R - a R class

Parameters:

original - a Supplier object

Returns:

a Singleton object

from

public static <T,R> Singleton<R> from(Function<T,R> original,
                                            T arg0)

from.

Type Parameters:

T - a T class

R - a R class

Parameters:

original - a Function object

arg0 - a T object

Returns:

a Singleton object

from

public static <T,U,R> Singleton<R> from(BiFunction<T,U,R> original,
                                                    T arg0,
                                                    U arg1)

from.

Type Parameters:

T - a T class

U - a U class

R - a R class

Parameters:

original - a BiFunction object

arg0 - a T object

arg1 - a U object

Returns:

a Singleton object

fromLazy

public static <T,R> Singleton<R> fromLazy(Function<T,R> original,
                                                Supplier<T> arg0Supplier)

fromLazy.

Type Parameters:

T - a T class

R - a R class

Parameters:

original - a Function object

arg0Supplier - a Supplier object

Returns:

a Singleton object

fromLazy

public static <T,U,R> Singleton<R> fromLazy(BiFunction<T,U,R> original,
                                                        Supplier<T> arg0Supplier,
                                                        Supplier<U> arg1Supplier)

fromLazy.

Type Parameters:

T - a T class

U - a U class

R - a R class

Parameters:

original - a BiFunction object

arg0Supplier - a Supplier object

arg1Supplier - a Supplier object

Returns:

a Singleton object

get

public R get()

Specified by:

get in interface Supplier<R>