stonehorse.candy

Class Functions

java.lang.Object

stonehorse.candy.Functions

public class Functions
extends Object

Functions for basic functional composition

Method Summary

Modifier and Type	Method and Description
static <T> Function<T,Boolean>	complement(Predicate<? super T> f) Returns a function that return false if supplied returns true, and true is supplied returns false
static <A,B,V> Function<A,V>	compose(Function<? super A,? extends B> f1, Function<? super B,? extends V> f2) Returns a composed function that first applies f1 to its input, and then f2 to the result..
static <T,U,V> Function<U,V>	function(BiFunction<? super T,? super U,? extends V> f, T t) Produces a Function of a BiFunction by supplying the first argument
static <V,U extends V> Function<U,V>	identity() returns the identity function, which returns the argument applied
static <T,V> Supplier<V>	supplier(Function<? super T,? extends V> f, T t) produces a supplier by applying the argument to a functions, without calling the function.

Methods inherited from class java.lang.Object

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

Method Detail

supplier

public static <T,V> Supplier<V> supplier(Function<? super T,? extends V> f,
                                         T t)

produces a supplier by applying the argument to a functions, without calling the function. The function is called when the supplier is evaluated.

Example:

function

public static <T,U,V> Function<U,V> function(BiFunction<? super T,? super U,? extends V> f,
                                             T t)

Produces a Function of a BiFunction by supplying the first argument

complement

public static <T> Function<T,Boolean> complement(Predicate<? super T> f)

Returns a function that return false if supplied returns true, and true is supplied returns false

identity

public static <V,U extends V> Function<U,V> identity()

returns the identity function, which returns the argument applied

compose

public static <A,B,V> Function<A,V> compose(Function<? super A,? extends B> f1,
                                            Function<? super B,? extends V> f2)

Returns a composed function that first applies f1 to its input, and then f2 to the result..