org.clafer.collection

Class Maybe<T>

java.lang.Object

org.clafer.collection.Maybe<T>

Type Parameters:

T - the type of maybe

Direct Known Subclasses:

Just, Nothing

public abstract class Maybe<T>
extends Object

A option type. Does not allow nulls.

Author:

jimmy

Constructor Summary

Constructors

Constructor and Description
Maybe()

Method Summary

Methods

Modifier and Type	Method and Description
static <T> List<T>	filterJust(List<Maybe<? extends T>> maybes)
static <T> T[]	filterJust(Maybe<? extends T>[] maybes, T... array)
abstract T	fromMaybe(T t)
abstract boolean	isJust()
abstract boolean	isNothing()
static <T> Just<T>	just(T t)
static <T> Nothing<T>	nothing()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Maybe

public Maybe()

Method Detail

isNothing

public abstract boolean isNothing()

isJust

public abstract boolean isJust()

fromMaybe

public abstract T fromMaybe(T t)

nothing

public static <T> Nothing<T> nothing()

just

public static <T> Just<T> just(T t)

filterJust

public static <T> List<T> filterJust(List<Maybe<? extends T>> maybes)

filterJust

@SafeVarargs
public static <T> T[] filterJust(Maybe<? extends T>[] maybes,
                             T... array)