com.io7m.jfunctional

Class Option

java.lang.Object

com.io7m.jfunctional.Option

@EqualityReference
public final class Option
extends Object

Constructor functions for optional values.

See Also:

OptionType

Method Summary

Modifier and Type	Method and Description
static <T> OptionType<T>	none() Return None.
static <T> OptionType<T>	of(T x) If x == null, return None, else return Some containing x.
static <T> OptionType<T>	some(T x) Return Some containing x.

Methods inherited from class java.lang.Object

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

Method Detail

none

public static <T> OptionType<T> none()

Return None.

Type Parameters:

T - The type of values

Returns:

An optional value

of

public static <T> OptionType<T> of(@Nullable
                                   T x)

If x == null, return None, else return Some containing x.

Type Parameters:

T - The type of values

Parameters:

x - The value

Returns:

An optional value

some

public static <T> OptionType<T> some(T x)

Return Some containing x.

Type Parameters:

T - The type of values

Parameters:

x - The value

Returns:

An optional value