net.lenni0451.commons.functional.functions

Interface Function<O,R>

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface Function<O,R>

Method Summary

Modifier and Type	Method and Description
default <X> Function<X,R>	after(Function<? super X,? extends O> other) Executes the other function before this one.
R	apply(O o)
default <X> Function<O,X>	before(Function<? super R,? extends X> other) Executes the other function after this one.
default <T> Function<T,T>	identity() A function that always returns the argument value.

Method Detail

apply

R apply(O o)

before

default <X> Function<O,X> before(Function<? super R,? extends X> other)

Executes the other function after this one.
a.before(b); //a is executed before b

Type Parameters:

X - The return type of the other function

Parameters:

other - The other function to execute

Returns:

The wrapper function

after

default <X> Function<X,R> after(Function<? super X,? extends O> other)

Executes the other function before this one.
a.after(b); //b is executed before a

Type Parameters:

X - The argument type of the other function

Parameters:

other - The other function to execute

Returns:

The wrapper function

identity

default <T> Function<T,T> identity()

A function that always returns the argument value.

Type Parameters:

T - The type of the argument

Returns:

The identity function