org.grouplens.lenskit.util

Class MoreSuppliers

java.lang.Object

org.grouplens.lenskit.util.MoreSuppliers

public final class MoreSuppliers
extends Object

Utility functions for suppliers.

Since:

2.1

Method Summary

Modifier and Type	Method and Description
static <X,T> Supplier<T>	curry(Function<? super X,T> func, X arg)
static <T> Supplier<T>	softMemoize(Supplier<T> supplier) Softly memoize a supplier.
static <T> Supplier<T>	weakMemoize(Supplier<T> supplier) Weakly memoize a supplier.

Methods inherited from class java.lang.Object

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

Method Detail

weakMemoize

public static <T> Supplier<T> weakMemoize(Supplier<T> supplier)

Weakly memoize a supplier.

Type Parameters:

T - The type returned by the supplier.

Parameters:

supplier - The supplier to memoize. The supplier cannot return null.

Returns:

A supplier that memoizes supplier with a weak reference.

softMemoize

public static <T> Supplier<T> softMemoize(Supplier<T> supplier)

Softly memoize a supplier.

Type Parameters:

T - The type returned by the supplier.

Parameters:

supplier - The supplier to memoize. The supplier cannot return null.

Returns:

A supplier that memoizes supplier with a soft reference.

curry

public static <X,T> Supplier<T> curry(Function<? super X,T> func,
                                      X arg)