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#include "topfreq.h"
#include <cmath>
#include <algorithm>
using namespace NKikimr;
using namespace NUdf;
template <typename THash, typename TEquals>
TTopFreqBase<THash, TEquals>::TTopFreqBase(THash hash, TEquals equals)
: Indices_(0, hash, equals)
{}
template <typename THash, typename TEquals>
void TTopFreqBase<THash, TEquals>::Init(const TUnboxedValuePod& value, const ui32 minSize, const ui32 maxSize) {
MinSize_ = minSize;
MaxSize_ = maxSize;
Freqs_.reserve(MaxSize_ + 1);
Indices_.reserve(MaxSize_ + 1);
AddValue(value);
}
template <typename THash, typename TEquals>
void TTopFreqBase<THash, TEquals>::Merge(const TTopFreqBase& topFreq1, const TTopFreqBase& topFreq2) {
MinSize_ = std::max(topFreq1.MinSize_, topFreq2.MinSize_);
MaxSize_ = std::max(topFreq1.MaxSize_, topFreq2.MaxSize_);
Freqs_.reserve(std::max(MaxSize_ + 1, ui32(topFreq1.Freqs_.size() + topFreq2.Freqs_.size())));
Indices_.reserve(MaxSize_ + 1);
Add(topFreq1);
Add(topFreq2);
}
template <typename THash, typename TEquals>
void TTopFreqBase<THash, TEquals>::Deserialize(const TUnboxedValuePod& serialized) {
MinSize_ = serialized.GetElement(0).Get<ui32>();
MaxSize_ = serialized.GetElement(1).Get<ui32>();
Freqs_.reserve(MaxSize_ + 1);
Indices_.reserve(MaxSize_ + 1);
const auto listIter = serialized.GetElement(2).GetListIterator();
for (TUnboxedValue current; listIter.Next(current);) {
Update(current.GetElement(1), current.GetElement(0).Get<ui64>());
}
}
template <typename THash, typename TEquals>
TUnboxedValue TTopFreqBase<THash, TEquals>::Convert(const IValueBuilder* valueBuilder) const {
TUnboxedValue* values = nullptr;
const auto list = valueBuilder->NewArray(Freqs_.size(), values);
for (const auto& item : Freqs_) {
TUnboxedValue* items = nullptr;
*values++ = valueBuilder->NewArray(2U, items);
items[0] = TUnboxedValuePod(item.second);
items[1] = item.first;
}
return list;
}
template <typename THash, typename TEquals>
void TTopFreqBase<THash, TEquals>::Add(const TTopFreqBase& otherModeCalc) {
for (auto& it : otherModeCalc.Freqs_) {
Update(it.first, it.second);
}
TryCompress();
}
template <typename THash, typename TEquals>
TUnboxedValue TTopFreqBase<THash, TEquals>::Get(const IValueBuilder* builder, ui32 resultSize) {
resultSize = std::min(resultSize, ui32(Freqs_.size()));
Compress(resultSize, true);
return Convert(builder);
}
template <typename THash, typename TEquals>
void TTopFreqBase<THash, TEquals>::AddValue(const TUnboxedValuePod& value) {
Update(value, 1);
TryCompress();
}
template <typename THash, typename TEquals>
void TTopFreqBase<THash, TEquals>::Update(const TUnboxedValuePod& value, ui64 freq) {
Freqs_.emplace_back(TUnboxedValuePod(value), freq);
auto mapInsertResult = Indices_.emplace(TUnboxedValuePod(value), Freqs_.size() - 1);
if (!mapInsertResult.second) {
Freqs_[mapInsertResult.first->second].second += freq;
Freqs_.pop_back();
}
}
template <typename THash, typename TEquals>
void TTopFreqBase<THash, TEquals>::TryCompress() {
auto freqSize = Freqs_.size();
if (freqSize > MaxSize_) {
Compress(MinSize_);
}
}
template <typename THash, typename TEquals>
void TTopFreqBase<THash, TEquals>::Compress(ui32 newSize, bool sort) {
auto compare = [](const TVectorElement& v1, const TVectorElement& v2) {
return v1.second > v2.second;
};
if (sort) {
std::sort(Freqs_.begin(), Freqs_.end(), compare);
} else {
std::nth_element(Freqs_.begin(), Freqs_.begin() + newSize - 1, Freqs_.end(), compare);
}
Indices_.clear();
Freqs_.resize(newSize);
for (ui32 i = 0; i < newSize; i++) {
Indices_[Freqs_[i].first] = i;
}
}
template <typename THash, typename TEquals>
TUnboxedValue TTopFreqBase<THash, TEquals>::Serialize(const IValueBuilder* builder) {
if (ui32(Freqs_.size()) > MinSize_) {
Compress(MinSize_);
}
TUnboxedValue* items = nullptr;
auto tuple = builder->NewArray(3U, items);
items[0] = TUnboxedValuePod(MinSize_);
items[1] = TUnboxedValuePod(MaxSize_);
items[2] = Convert(builder);
return tuple;
}
template <EDataSlot Slot>
TTopFreqData<Slot>::TTopFreqData(const TUnboxedValuePod& value, const ui32 minSize, const ui32 maxSize)
: TBase(TUnboxedValueHash<Slot>(), TUnboxedValueEquals<Slot>())
{
TBase::Init(value, minSize, maxSize);
}
template <EDataSlot Slot>
TTopFreqData<Slot>::TTopFreqData(const TTopFreqData& topFreq1, const TTopFreqData& topFreq2)
: TBase(TUnboxedValueHash<Slot>(), TUnboxedValueEquals<Slot>())
{
TBase::Merge(topFreq1, topFreq2);
}
template <EDataSlot Slot>
TTopFreqData<Slot>::TTopFreqData(const TUnboxedValuePod& serialized)
: TBase(TUnboxedValueHash<Slot>(), TUnboxedValueEquals<Slot>())
{
TBase::Deserialize(serialized);
}
template <EDataSlot Slot>
TUnboxedValue TTopFreqData<Slot>::Serialize(const IValueBuilder* builder) {
return TBase::Serialize(builder);
}
template <EDataSlot Slot>
TUnboxedValue TTopFreqData<Slot>::Get(const IValueBuilder* builder, ui32 resultSize) {
return TBase::Get(builder, resultSize);
}
template <EDataSlot Slot>
void TTopFreqData<Slot>::AddValue(const TUnboxedValuePod& value) {
TBase::AddValue(value);
}
#define INSTANCE_FOR(slot, ...) \
template class TTopFreqData<EDataSlot::slot>;
UDF_TYPE_ID_MAP(INSTANCE_FOR)
#undef INSTANCE_FOR
TTopFreqGeneric::TTopFreqGeneric(const TUnboxedValuePod& value, const ui32 minSize, const ui32 maxSize,
IHash::TPtr hash, IEquate::TPtr equate)
: TBase(TGenericHash{hash}, TGenericEquals{equate})
{
TBase::Init(value, minSize, maxSize);
}
TTopFreqGeneric::TTopFreqGeneric(const TTopFreqGeneric& topFreq1, const TTopFreqGeneric& topFreq2,
IHash::TPtr hash, IEquate::TPtr equate)
: TBase(TGenericHash{hash}, TGenericEquals{equate})
{
TBase::Merge(topFreq1, topFreq2);
}
TTopFreqGeneric::TTopFreqGeneric(const TUnboxedValuePod& serialized,
IHash::TPtr hash, IEquate::TPtr equate)
: TBase(TGenericHash{hash}, TGenericEquals{equate})
{
TBase::Deserialize(serialized);
}
TUnboxedValue TTopFreqGeneric::Serialize(const IValueBuilder* builder) {
return TBase::Serialize(builder);
}
TUnboxedValue TTopFreqGeneric::Get(const IValueBuilder* builder, ui32 resultSize) {
return TBase::Get(builder, resultSize);
}
void TTopFreqGeneric::AddValue(const TUnboxedValuePod& value) {
TBase::AddValue(value);
}
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