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
024 * {@link MetricSampleQuantiles} object.
025 */
026@InterfaceAudience.Private
027public class MetricQuantile {
028  /**
029   * The quantile to be watched by a {@link MetricSampleQuantiles}.
030   */
031  final double quantile;
032  /**
033   * The error bounds for the {@link #quantile}.
034   */
035  final double error;
036
037  public MetricQuantile(double quantile, double error) {
038    this.quantile = quantile;
039    this.error = error;
040  }
041
042  @Override
043  public boolean equals(Object aThat) {
044    if (this == aThat) {
045      return true;
046    }
047    if (!(aThat instanceof MetricQuantile)) {
048      return false;
049    }
050
051    MetricQuantile that = (MetricQuantile) aThat;
052
053    long qbits = Double.doubleToLongBits(quantile);
054    long ebits = Double.doubleToLongBits(error);
055
056    return qbits == Double.doubleToLongBits(that.quantile)
057        && ebits == Double.doubleToLongBits(that.error);
058  }
059
060  @Override
061  public int hashCode() {
062    return (int) (Double.doubleToLongBits(quantile) ^ Double
063        .doubleToLongBits(error));
064  }
065}