Package net.adoptopenjdk.icedteaweb

Class LazyLoaded<T>

java.lang.Object

net.adoptopenjdk.icedteaweb.LazyLoaded<T>

Type Parameters:

T - the type of the object to lazy load.

All Implemented Interfaces:

Supplier<T>

public class LazyLoaded<T>
extends Object
implements Supplier<T>

Generic wrapper for thread safe lazy loading. For details see: https://en.wikipedia.org/wiki/Double-checked_locking#Usage_in_Java

Field Summary

Fields

Modifier and Type	Field	Description
private T	instance
private Supplier<T>	supplier

Constructor Summary

Constructors

Constructor	Description
LazyLoaded(Supplier<T> supplier)

Method Summary

Modifier and Type	Method	Description
T	get()
boolean	isLoaded()

Methods inherited from class java.lang.Object

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

Field Details

supplier

private Supplier<T> supplier

instance

private volatile T instance

Constructor Details

LazyLoaded

public LazyLoaded(Supplier<T> supplier)

Parameters:

supplier - supplier to load the value lazy upon first request. Must not be null and should not return null.

Method Details

get

public T get()

Specified by:

get in interface Supplier<T>

Returns:

the value which is lazy loaded if necessary.

isLoaded

public boolean isLoaded()

Returns:

true iff the data has been loaded