org.magicwerk.brownies.collections.helper

Class Option<T>

java.lang.Object

org.magicwerk.brownies.collections.helper.Option<T>

Type Parameters:

T - element type

public class Option<T>
extends java.lang.Object

The Option class allows to distinguish between a null value and no value.

Version:

$Id: Option.java 2549 2014-10-28 20:39:05Z origo $

Author:

Thomas Mauch

Constructor Summary

Constructors

Constructor and Description
Option(T value)

Method Summary

Methods

Modifier and Type	Method and Description
static <EE> Option<EE>	EMPTY()
T	getValue() Returns stored value.
T	getValueOrNull()
boolean	hasValue()
java.lang.String	toString()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Option

public Option(T value)

Method Detail

EMPTY

public static <EE> Option<EE> EMPTY()

Returns:

unmodifiable empty instance

hasValue

public boolean hasValue()

getValueOrNull

public T getValueOrNull()

getValue

public T getValue()

Returns stored value. If no value is stored, an exception is thrown.

Returns:

stored value

Throws:

java.lang.IllegalArgumentException - if no value is stored

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object