Package bdsup2sub.utils.optional

Class Optional<T>

java.lang.Object

bdsup2sub.utils.optional.Optional<T>

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

Absent, Present

public abstract class Optional<T>
extends Object
implements Serializable

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
private static final long	serialVersionUID

Constructor Summary

Constructors

Constructor	Description
Optional()

Method Summary

Modifier and Type	Method	Description
static <T> Optional<T>	absent()
private static <T> T	checkNotNull(T reference)
abstract boolean	equals(Object object)
static <T> Optional<T>	fromNullable(T nullableReference)
abstract T	get()
abstract int	hashCode()
abstract boolean	isPresent()
static <T> Optional<T>	of(T reference)
abstract Object	orNull()

Methods inherited from class java.lang.Object

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

Field Details

serialVersionUID

private static final long serialVersionUID

See Also:

• Constant Field Values

Constructor Details

Optional

Optional()

Method Details

absent

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

of

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

checkNotNull

private static <T> T checkNotNull(T reference)

fromNullable

public static <T> Optional<T> fromNullable(T nullableReference)

isPresent

public abstract boolean isPresent()

get

public abstract T get()

orNull

public abstract Object orNull()

equals

public abstract boolean equals(Object object)

Overrides:

equals in class Object

hashCode

public abstract int hashCode()

Overrides:

hashCode in class Object