org.ujorm.tools.common

Interface Joinable<D,R>

All Superinterfaces:

Function<D,R>

public interface Joinable<D,R>
extends Function<D,R>

A joinable function

Usage

  Function<Person, String> nameProvider = Joinable
     .of (Person::getBoss)
     .add(Person::getBoss)
     .add(Person::getName);
  String superBossName = nameProvider.apply(getPerson());
 

Method Summary

Modifier and Type	Method and Description
default <F> Joinable<D,F>	add(Joinable<R,F> next) Send a result of the first function to the next one.
R	apply(D d) Applies this function to the given argument.
static <D,R> Joinable<D,R>	of(Function<D,R> fce) Create a joinable function

Methods inherited from interface java.util.function.Function

andThen, compose, identity

Method Detail

apply

@Nullable
R apply(@Nullable
                  D d)

Applies this function to the given argument.

Specified by:

apply in interface Function<D,R>

Parameters:

d - The nullable function argument

Returns:

The function result

add

@Nullable
default <F> Joinable<D,F> add(@Nonnull
                                        Joinable<R,F> next)

Send a result of the first function to the next one.

Type Parameters:

F - A final result type

Parameters:

next - Next function

Returns:

If a result of the first function is null than the final result is null too.

of

@Nonnull
static <D,R> Joinable<D,R> of(@Nonnull
                                       Function<D,R> fce)

Create a joinable function

Type Parameters:

D - Domain value

R - Result value

Parameters:

fce - An original function

Returns:

The new object type of Function