org.smallibs.data

Interface Maybe<T>

All Superinterfaces:

Filter<Maybe,T,Maybe<T>>, HK<Maybe,T,Maybe<T>>

All Known Implementing Classes:

Maybe.None, Maybe.Some

public interface Maybe<T>
extends Filter<Maybe,T,Maybe<T>>, HK<Maybe,T,Maybe<T>>

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	Maybe.None<T> None implementation
static class	Maybe.Some<T> Some implementation

Method Summary

Modifier and Type	Method and Description
default <R> R	apply(java.util.function.Function<HK<Maybe,T,Maybe<T>>,R> f)
default Maybe<T>	filter(java.util.function.Predicate<? super T> predicate) Method called when the current data must be filtered using a given predicate.
<B> Maybe<B>	flatmap(java.util.function.Function<? super T,Maybe<B>> mapper)
default <B> B	fold(java.util.function.Function<? super T,B> some, java.util.function.Supplier<B> none)
default boolean	hasSome()
default <B> Maybe<B>	map(java.util.function.Function<? super T,? extends B> mapper)
static <T> Maybe<T>	none()
Maybe<T>	onNone(Runnable onNone)
Maybe<T>	onSome(java.util.function.Consumer<T> onSuccess)
T	orElse(java.util.function.Supplier<T> t)
default T	orElse(T t)
default Maybe<T>	self()
static <T> Maybe<T>	some(T value)

Method Detail

some

static <T> Maybe<T> some(T value)

none

static <T> Maybe<T> none()

apply

default <R> R apply(java.util.function.Function<HK<Maybe,T,Maybe<T>>,R> f)

Specified by:

apply in interface HK<Maybe,T,Maybe<T>>

self

default Maybe<T> self()

Specified by:

self in interface HK<Maybe,T,Maybe<T>>

filter

default Maybe<T> filter(java.util.function.Predicate<? super T> predicate)

Description copied from interface: Filter

Method called when the current data must be filtered using a given predicate.

Specified by:

filter in interface Filter<Maybe,T,Maybe<T>>

Parameters:

predicate - The filter

Returns:

a filtered data

map

default <B> Maybe<B> map(java.util.function.Function<? super T,? extends B> mapper)

fold

default <B> B fold(java.util.function.Function<? super T,B> some,
                   java.util.function.Supplier<B> none)

orElse

default T orElse(T t)

hasSome

default boolean hasSome()

onSome

Maybe<T> onSome(java.util.function.Consumer<T> onSuccess)

onNone

Maybe<T> onNone(Runnable onNone)

flatmap

<B> Maybe<B> flatmap(java.util.function.Function<? super T,Maybe<B>> mapper)

orElse

T orElse(java.util.function.Supplier<T> t)