Class LazyThrowingSingleton<T, X extends Exception>

java.lang.Object

uk.co.parnmatt.vector.util.LazyThrowingSingleton<T,X>

Type Parameters:

T - the type of the singleton value

X - the exception that can be thrown during the evaluation of the singleton

All Implemented Interfaces:

ThrowingSupplier<T,X>

public final class LazyThrowingSingleton<T, X extends Exception>
extends Object
implements ThrowingSupplier<T,X>

Represents a singleton that is lazily evaluated on the first call to get()

Constructor Summary

Constructors

Constructor	Description
LazyThrowingSingleton(ThrowingSupplier<T,X> supplier)

Method Summary

Modifier and Type	Method	Description
T	get()
T	getIfPresentOrNull()
boolean	isInitialized()
String	toString()

Methods inherited from class Object

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

Constructor Details

LazyThrowingSingleton

public LazyThrowingSingleton(ThrowingSupplier<T,X> supplier)

Parameters:

supplier - the supplier to provide the value of the singleton

Method Details

get

public T get()
      throws X

Specified by:

get in interface ThrowingSupplier<T, X extends Exception>

Returns:

the value of the supplier

Throws:

X

See Also:

• Supplier.get()

getIfPresentOrNull

public T getIfPresentOrNull()

Returns:

the singleton if it has been initialized, otherwise null

isInitialized

public boolean isInitialized()

Returns:

true if the singleton has been initialized, otherwise false

toString

public String toString()

Overrides:

toString in class Object