com.atlassian.confluence.cache.option
Class None<T>

java.lang.Object
  com.atlassian.confluence.cache.option.None<T>

Type Parameters:

T -

All Implemented Interfaces:

Option<T>, Serializable

public class None<T>
extends Object
implements Option<T>

A cached option for no value. This is used when the factory does not find the value to cache and the missing value needs to be cached. The readResolve() method has been implemented to return the singleton instance so the Object.equals(Object) and Object.hashCode() methods behave as expected for objects that have propagated over the distributed cache.

See Also:

Serialized Form

Field Summary

static None<?>

INSTANCE

Constructor Summary

None()

Method Summary

boolean	exists()
T	getOrElse(T otherwise)

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final None<?> INSTANCE

Constructor Detail

None

public None()

Method Detail

exists

public boolean exists()

Specified by:

exists in interface Option<T>

getOrElse

public T getOrElse(T otherwise)

Specified by:

getOrElse in interface Option<T>