org.apache.accumulo.core.util.Stat.java Source code

Introduction

Here is the source code for org.apache.accumulo.core.util.Stat.java

Source

/*
 * 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 org.apache.accumulo.core.util;

import org.apache.commons.math.stat.descriptive.StorelessUnivariateStatistic;
import org.apache.commons.math.stat.descriptive.moment.Mean;
import org.apache.commons.math.stat.descriptive.moment.StandardDeviation;
import org.apache.commons.math.stat.descriptive.rank.Max;
import org.apache.commons.math.stat.descriptive.rank.Min;
import org.apache.commons.math.stat.descriptive.summary.Sum;

public class Stat {
    Min min;
    Max max;
    Sum sum;
    Mean mean;
    StandardDeviation sd;

    StorelessUnivariateStatistic[] stats;

    public Stat() {
        min = new Min();
        max = new Max();
        sum = new Sum();
        mean = new Mean();
        sd = new StandardDeviation();

        stats = new StorelessUnivariateStatistic[] { min, max, sum, mean, sd };
    }

    public void addStat(long stat) {
        for (StorelessUnivariateStatistic statistic : stats) {
            statistic.increment(stat);
        }
    }

    public long getMin() {
        return (long) min.getResult();
    }

    public long getMax() {
        return (long) max.getResult();
    }

    public long getSum() {
        return (long) sum.getResult();
    }

    public double getAverage() {
        return mean.getResult();
    }

    public double getStdDev() {
        return sd.getResult();
    }

    @Override
    public String toString() {
        return String.format("%,d %,d %,.2f %,d", getMin(), getMax(), getAverage(), mean.getN());
    }

    public void clear() {
        for (StorelessUnivariateStatistic statistic : stats) {
            statistic.clear();
        }
    }

}