Class ConcurrentLazyReference<T>

java.lang.Object

io.github.cowwoc.pouch10.core.ConcurrentLazyReference<T>

Type Parameters:

T - the type of object being referenced

All Implemented Interfaces:

Reference<T>

public abstract class ConcurrentLazyReference<T>
extends Object
implements Reference<T>

A thread-safe reference that initializes a value on demand.

The implementation is thread-safe.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ConcurrentLazyReference()	Creates a new instance.

Method Summary

Modifier and Type	Method	Description
static <T> ConcurrentLazyReference<T>	create(Supplier<T> supplier)	Creates a new ConcurrentLazyReference.
protected abstract T	createValue()	Creates the value.
final T	getValue()	Returns the value.
boolean	isInitialized()	Returns true if the value was initialized.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

ConcurrentLazyReference

protected ConcurrentLazyReference()

Creates a new instance.

Method Details

create

public static <T> ConcurrentLazyReference<T> create(Supplier<T> supplier)

Creates a new ConcurrentLazyReference.

Type Parameters:

T - the type of value returned by the reference

Parameters:

supplier - supplies the reference value

Returns:

a new ConcurrentLazyReference

isInitialized

public boolean isInitialized()

Returns true if the value was initialized.

Specified by:

isInitialized in interface Reference<T>

Returns:

true if the value was initialized

getValue

public final T getValue()

Description copied from interface: Reference

Returns the value. Subsequent invocations of this method return the same value.

Specified by:

getValue in interface Reference<T>

Returns:

an object of type <T>

createValue

protected abstract T createValue()

Creates the value. This method is invoked the first time getValue() is invoked.

Returns:

the value

toString

public String toString()

Overrides:

toString in class Object