net.ripe.commons.ip

Class Optional<T>

java.lang.Object

net.ripe.commons.ip.Optional<T>

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

Optional.Absent, Optional.Present

public abstract class Optional<T>
extends Object
implements Serializable

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Optional.Absent<T>
static class	Optional.Present<T>

Constructor Summary

Constructors

Constructor and Description
Optional()

Method Summary

Methods

Modifier and Type	Method and Description
static <T> Optional<T>	absent()
abstract T	get()
static <T> T	getOrNull(Optional<T> optional)
boolean	isAbsent()
abstract boolean	isPresent()
static <T> Optional<T>	of(T value)

Methods inherited from class java.lang.Object

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

Constructor Detail

Optional

public Optional()

Method Detail

of

public static <T> Optional<T> of(T value)

absent

public static <T> Optional<T> absent()

getOrNull

public static <T> T getOrNull(Optional<T> optional)

get

public abstract T get()

isPresent

public abstract boolean isPresent()

isAbsent

public boolean isAbsent()