/*
Copyright (c) 2012 LinkedIn Corp.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/* $Id$ */
package com.linkedin.common.util;
/**
* Object that represents no value. Primarily used with callbacks.
*
* @author Chris Pettitt
* @version $Revision$
*/
public class None
{
private static final None INSTANCE = new None();
private None()
{
}
public static None none()
{
return INSTANCE;
}
}