/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you 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.

  */

 package com.yammer.metrics.core;

 /**

  * A Metrics Gauge implementation that always returns null.

  * @param <T> Type of value returned by this Gauge.

  */

 public class NoOpGuage<T> extends Gauge<T> {

   /** singleton instance for everyone to use */

   public static final NoOpGuage INSTANCE = new NoOpGuage();

   /** do not instantiate */

   public NoOpGuage() { }

   @Override

   public T value() { return null; }

 }