io.atlassian.fugue

Interface Either.Projection<A,B,L,R>

All Superinterfaces:

Effect.Applicant<A>, Iterable<A>, Maybe<A>

All Known Implementing Classes:

Either.LeftProjection, Either.RightProjection

Enclosing class:

Either<L,R>

public static interface Either.Projection<A,B,L,R>
extends Maybe<A>

Method Summary

Modifier and Type	Method and Description
Either<L,R>	either() The either value underlying this projection.
A	on(Function<? super B,? extends A> f) The value of this projection or the result of the given function on the opposing projection's value.
Option<? super A>	toOption() Returns this projection's value in Some if it exists, otherwise None.
Optional<? super A>	toOptional() Returns this projection's value in Optional.of(T) if it exists, otherwise Optional.empty().
Stream<? super A>	toStream() Returns this projection's value in Stream.of(T) if it exists, otherwise Stream.empty().

Methods inherited from interface io.atlassian.fugue.Maybe

exists, forall, get, getOr, getOrElse, getOrElse, getOrError, getOrNull, getOrThrow, isDefined, isEmpty, iterator

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Methods inherited from interface io.atlassian.fugue.Effect.Applicant

foreach

Method Detail

either

Either<L,R> either()

The either value underlying this projection.

Returns:

The either value underlying this projection.

toOption

Option<? super A> toOption()

Returns this projection's value in Some if it exists, otherwise None.

Returns:

This projection's value in Some if it exists, otherwise None.

toOptional

Optional<? super A> toOptional()

Returns this projection's value in Optional.of(T) if it exists, otherwise Optional.empty().

Returns:

This projection's value in of if it exists, otherwise empty.

Since:

4.0

toStream

Stream<? super A> toStream()

Returns this projection's value in Stream.of(T) if it exists, otherwise Stream.empty().

Returns:

This projection's value in of if it exists, otherwise empty.

Since:

4.5.0

on

A on(Function<? super B,? extends A> f)

The value of this projection or the result of the given function on the opposing projection's value.

Parameters:

f - The function to execute if this projection has no value.

Returns:

The value of this projection or the result of the given function on the opposing projection's value.