com.mingweisamuel.zyra.util

Class Lazy<T>

java.lang.Object

com.mingweisamuel.zyra.util.Lazy<T>

All Implemented Interfaces:

Supplier<T>

Direct Known Subclasses:

LazyResetable

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

Lazy loading. Creates single instances only when needed. Thread safe.

Field Summary

Fields

Modifier and Type	Field and Description
protected Supplier<T>	supplier The supplier.
protected T	value The value.

Constructor Summary

Constructors

Constructor and Description
Lazy(Supplier<T> supplier) Creates a Lazy using SUPPLIER.

Method Summary

Modifier and Type	Method and Description
boolean	created()
T	get()
protected T	getInternal() Helper to avoid synchronizing get().

Methods inherited from class java.lang.Object

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

Field Detail

value

protected volatile T value

The value. Null if not yet created.

supplier

protected volatile Supplier<T> supplier

The supplier. Null if already used.

Constructor Detail

Lazy

public Lazy(Supplier<T> supplier)

Creates a Lazy using SUPPLIER.

Parameters:

supplier - Supplier of the value. Only called once.

Method Detail

created

public boolean created()

Returns:

true if instance has been created.

get

public T get()

Specified by:

get in interface Supplier<T>

Returns:

the instance. Creates it if needed.

getInternal

protected T getInternal()

Helper to avoid synchronizing get().

Returns:

the instance.