Package org.dmfs.jems2.optional

Class Absent<T>

java.lang.Object

org.dmfs.jems2.optional.Absent<T>

All Implemented Interfaces:

Optional<T>

public final class Absent<T>
extends Object
implements Optional<T>

An Optional value that's never present.

Constructor Summary

Constructors

Constructor	Description
Absent()

Method Summary

Modifier and Type	Method	Description
static <T> Absent<T>	absent()	Returns an Absent value.
boolean	isPresent()	Returns whether the optional value is present.
T	value()	Returns the optional value.

Methods inherited from class java.lang.Object

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

Constructor Details

Absent

public Absent()

Method Details

absent

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

Returns an Absent value.

Type Parameters:

T - The type of the absent value.

Returns:

An Absent of the given type.

isPresent

public boolean isPresent()

Description copied from interface: Optional

Returns whether the optional value is present.

Specified by:

isPresent in interface Optional<T>

value

public T value()
        throws NoSuchElementException

Description copied from interface: Optional

Returns the optional value.

Specified by:

value in interface Optional<T>

Throws:

NoSuchElementException - if the optional value is not present.