Package io.vavr.control

Interface CheckedFunction<T,R>

Type Parameters:

T - the type of this function's domain

R - the type of this function's codomain, i.e. the return type

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 CheckedFunction<T,R>

A Function which may throw.

Method Summary

Modifier and Type	Method	Description
default <U> CheckedFunction<T,U>	andThen(CheckedFunction<? super R,? extends U> after)	Returns a composed function that first applies this to the given argument and then applies after to the result.
R	apply(T t)	Applies this function to one argument and returns the result.
default <U> CheckedFunction<U,R>	compose(CheckedFunction<? super U,? extends T> before)	Returns a composed function that first applies before to the given argument and then applies this to the result.
static <T> CheckedFunction<T,T>	identity()	Returns the identity CheckedFunction, i.e.

Method Detail

identity

static <T> CheckedFunction<T,T> identity()

Returns the identity CheckedFunction, i.e. the function that returns its input.

Type Parameters:

T - argument type (and return type) of the identity function

Returns:

the identity CheckedFunction

apply

R apply(T t)
 throws java.lang.Exception

Applies this function to one argument and returns the result.

Parameters:

t - argument of type T

Returns:

the result of the function application

Throws:

java.lang.Exception - if something goes wrong applying this function to the given argument

andThen

default <U> CheckedFunction<T,U> andThen(CheckedFunction<? super R,? extends U> after)

Returns a composed function that first applies this to the given argument and then applies after to the result.

Type Parameters:

U - return type of after

Parameters:

after - the function applied after this

Returns:

a function composed of this and after

Throws:

java.lang.NullPointerException - if after is null

compose

default <U> CheckedFunction<U,R> compose(CheckedFunction<? super U,? extends T> before)

Returns a composed function that first applies before to the given argument and then applies this to the result.

Type Parameters:

U - argument type of before

Parameters:

before - the function applied before this

Returns:

a function composed of before and this

Throws:

java.lang.NullPointerException - if before is null