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#pragma once
#include <util/generic/ptr.h>
#include <util/generic/vector.h>
namespace NKiwiAggr {
class THistogram;
class THistoRec;
class IHistogram;
typedef TAtomicSharedPtr<IHistogram> IHistogramPtr;
class IHistogram {
public:
// Supposed constructors:
//
// TSomeHistogram(size_t intervals, ui64 id = 0); // where intervals is some constant that defines histogram accuracy
// TSomeHistogram(const THistogram& histo); // histo must be acceptable for TSomeHistogram, for example, only with HT_FIXED_BIN_HISTOGRAM for TFixedBinHistogram
// TSomeHistogram(IHistogram* histo); // any kind of IHistogram
virtual ~IHistogram() {
}
virtual void Clear() = 0;
// zero- or negative-weighted values are skipped
virtual void Add(double value, double weight) = 0;
virtual void Add(const THistoRec& histoRec) = 0;
// Merge some other histos into current
virtual void Merge(const THistogram& histo, double multiplier) = 0;
virtual void Merge(const TVector<THistogram>& histogramsToMerge) = 0;
virtual void Merge(TVector<IHistogramPtr> histogramsToMerge) = 0;
// factor should be greater then zero
virtual void Multiply(double factor) = 0;
virtual void FromProto(const THistogram& histo) = 0; // throws exception in case of wrong histogram type of histo
virtual void ToProto(THistogram& histo) = 0;
virtual void SetId(ui64 id) = 0;
virtual ui64 GetId() = 0;
virtual bool Empty() = 0;
virtual double GetMinValue() = 0;
virtual double GetMaxValue() = 0;
virtual double GetSum() = 0;
virtual double GetSumInRange(double leftBound, double rightBound) = 0;
virtual double GetSumAboveBound(double bound) = 0;
virtual double GetSumBelowBound(double bound) = 0;
virtual double CalcUpperBound(double sum) = 0;
virtual double CalcLowerBound(double sum) = 0;
virtual double CalcUpperBoundSafe(double sum) = 0;
virtual double CalcLowerBoundSafe(double sum) = 0;
double GetValueAtPercentile(double percentile) {
return CalcUpperBound(percentile * GetSum());
}
double GetValueAtPercentileSafe(double percentile) {
return CalcUpperBoundSafe(percentile * GetSum());
}
// Histogram implementation is supposed to clear all precomputed values() if Add() is called after PrecomputePartialSums()
virtual void PrecomputePartialSums() {
}
};
}
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