Class DefaultMemoizingSupplier<T>

java.lang.Object

io.fluxzero.common.DefaultMemoizingSupplier<T>

Type Parameters:

T - the type of the value supplied and memoized

All Implemented Interfaces:

MemoizingSupplier<T>, Supplier<T>

public class DefaultMemoizingSupplier<T>
extends Object
implements MemoizingSupplier<T>

A default implementation of the MemoizingSupplier interface that memoizes (caches) the result of a computation performed by a supplied Supplier.

The result is computed the first time get() is called and then cached for subsequent calls until explicitly cleared with clear(). This implementation also supports an optional expiration duration for the cached value.

Constructor Summary

Constructors

Constructor	Description
DefaultMemoizingSupplier(Supplier<T> delegate)
DefaultMemoizingSupplier(Supplier<T> delegate, Duration lifespan, Clock clock)

Method Summary

Modifier and Type	Method	Description
void	clear()	Clears the cached value, forcing the next call to recompute.
T	get()
boolean	isCached()	Returns whether this supplier has already cached a value.

Methods inherited from class Object

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

Constructor Details

DefaultMemoizingSupplier

public DefaultMemoizingSupplier(Supplier<T> delegate)

DefaultMemoizingSupplier

public DefaultMemoizingSupplier(Supplier<T> delegate,
 Duration lifespan,
 Clock clock)

Method Details

get

public T get()

Specified by:

get in interface Supplier<T>

isCached

public boolean isCached()

Description copied from interface: MemoizingSupplier

Returns whether this supplier has already cached a value.

Specified by:

isCached in interface MemoizingSupplier<T>

clear

public void clear()

Description copied from interface: MemoizingSupplier

Clears the cached value, forcing the next call to recompute.

Specified by:

clear in interface MemoizingSupplier<T>