HistogramBuilder.java

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// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
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//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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package org.apache.doris.statistics;

import org.apache.doris.catalog.Type;

import java.util.List;

/**
 * Builder for histogram
 */
public class HistogramBuilder {

    private Type dataType;

    private double sampleRate;

    private int numBuckets;

    private List<Bucket> buckets;

    public HistogramBuilder() {
    }

    public HistogramBuilder(Histogram histogram) {
        this.dataType = histogram.dataType;
        this.sampleRate = histogram.sampleRate;
        this.buckets = histogram.buckets;
    }

    public HistogramBuilder setDataType(Type dataType) {
        this.dataType = dataType;
        return this;
    }

    public HistogramBuilder setSampleRate(double sampleRate) {
        this.sampleRate = sampleRate;
        return this;
    }

    public HistogramBuilder setNumBuckets(int numBuckets) {
        this.numBuckets = numBuckets;
        return this;
    }

    public HistogramBuilder setBuckets(List<Bucket> buckets) {
        this.buckets = buckets;
        return this;
    }

    public Histogram build() {
        return new Histogram(dataType, sampleRate, numBuckets, buckets);
    }
}