net.emaze.dysfunctional.options

Class Maybe<E>

java.lang.Object

net.emaze.dysfunctional.options.Maybe<E>

Type Parameters:

E - the value type

All Implemented Interfaces:

Iterable<E>

public class Maybe<E>
extends Object
implements Iterable<E>

Holds an optional value.

Author:

rferranti

Constructor Summary

Constructors

Constructor and Description
Maybe(E element, boolean hasValue)

Method Summary

Modifier and Type	Method and Description
<T> Either<T,E>	either(Provider<T> nothing)
boolean	equals(Object rhs)
<T> Maybe<T>	fmap(Delegate<T,E> delegate)
<T> T	fold(Provider<T> ifNothing, Delegate<T,E> ifJust)
int	hashCode()
boolean	hasValue()
Iterator<E>	iterator()
static <E> Maybe<E>	just(E element)
static <E> Maybe<E>	nothing()
E	orElse(E otherwise)
Maybe<E>	orElse(Maybe<E> otherwise)
String	toString()
E	value()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

Maybe

public Maybe(E element,
             boolean hasValue)

Method Detail

hasValue

public boolean hasValue()

value

public E value()

fmap

public <T> Maybe<T> fmap(Delegate<T,E> delegate)

fold

public <T> T fold(Provider<T> ifNothing,
                  Delegate<T,E> ifJust)

either

public <T> Either<T,E> either(Provider<T> nothing)

orElse

public E orElse(E otherwise)

orElse

public Maybe<E> orElse(Maybe<E> otherwise)

nothing

public static <E> Maybe<E> nothing()

just

public static <E> Maybe<E> just(E element)

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object rhs)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

iterator

public Iterator<E> iterator()

Specified by:

iterator in interface Iterable<E>