org.dmfs.jems.optional.elementary

Class Present<T>

java.lang.Object

org.dmfs.jems.optional.elementary.Present<T>

All Implemented Interfaces:

Optional<T>

public final class Present<T>
extends java.lang.Object
implements Optional<T>

A special Optional that's always present. As a consequence this doesn't take null values.

Constructor Summary

Constructors

Constructor and Description
Present(T value)

Method Summary

Modifier and Type	Method and Description
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 Detail

Present

public Present(T value)

Method Detail

isPresent

public boolean isPresent()

Description copied from interface: Optional

Returns whether the optional value is present.

Specified by:

isPresent in interface Optional<T>

Returns:

true if the value is present, false otherwise.

value

public T value()
        throws java.util.NoSuchElementException

Description copied from interface: Optional

Returns the optional value.

Specified by:

value in interface Optional<T>

Returns:

The value.

Throws:

java.util.NoSuchElementException - if the optional value is not present.