001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.metrics2.util;
019
020import org.apache.yetus.audience.InterfaceAudience;
021
022/**
023 * Specifies a quantile (with error bounds) to be watched by a {@link MetricSampleQuantiles} object.
024 */
025@InterfaceAudience.Private
026public class MetricQuantile {
027  /**
028   * The quantile to be watched by a {@link MetricSampleQuantiles}.
029   */
030  final double quantile;
031  /**
032   * The error bounds for the {@link #quantile}.
033   */
034  final double error;
035
036  public MetricQuantile(double quantile, double error) {
037    this.quantile = quantile;
038    this.error = error;
039  }
040
041  @Override
042  public boolean equals(Object aThat) {
043    if (this == aThat) {
044      return true;
045    }
046    if (!(aThat instanceof MetricQuantile)) {
047      return false;
048    }
049
050    MetricQuantile that = (MetricQuantile) aThat;
051
052    long qbits = Double.doubleToLongBits(quantile);
053    long ebits = Double.doubleToLongBits(error);
054
055    return qbits == Double.doubleToLongBits(that.quantile)
056      && ebits == Double.doubleToLongBits(that.error);
057  }
058
059  @Override
060  public int hashCode() {
061    return (int) (Double.doubleToLongBits(quantile) ^ Double.doubleToLongBits(error));
062  }
063}