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#pragma once
#include <yql/essentials/minikql/defs.h>
#include "mkql_computation_node_impl.h"
#include <yql/essentials/minikql/mkql_alloc.h>
namespace NKikimr {
namespace NMiniKQL {
template <typename TVectorType>
class TVectorListAdapter : public TComputationValue<TVectorListAdapter<TVectorType>> {
public:
typedef typename TVectorType::value_type TItem;
typedef TVectorListAdapter<TVectorType> TSelf;
typedef std::function<NUdf::TUnboxedValue(const TItem&)> TItemFactory;
typedef TComputationValue<TVectorListAdapter<TVectorType>> TBase;
class TIterator: public TTemporaryComputationValue<TIterator> {
public:
TIterator(TMemoryUsageInfo* memInfo, const TVectorType& list, TItemFactory itemFactory, ui64 start, ui64 finish, bool reversed)
: TTemporaryComputationValue<TIterator>(memInfo)
, List(list)
, ItemFactory(itemFactory)
, Start(start)
, Finish(finish)
, Reversed(reversed)
{
Index = Reversed ? Finish : (Start - 1);
}
private:
bool Next(NUdf::TUnboxedValue& value) override {
if (!Skip())
return false;
value = ItemFactory(List[Index]);
return true;
}
bool Skip() override {
if (!Reversed) {
if (Index + 1 >= Finish)
return false;
++Index;
} else {
if (Index < Start + 1)
return false;
--Index;
}
return true;
}
const TVectorType& List;
const TItemFactory ItemFactory;
const ui64 Start;
const ui64 Finish;
const bool Reversed;
ui64 Index;
};
class TDictIterator : public TTemporaryComputationValue<TDictIterator> {
public:
TDictIterator(TMemoryUsageInfo* memInfo, THolder<TIterator>&& iter)
: TTemporaryComputationValue<TDictIterator>(memInfo)
, Iter(std::move(iter))
, Index(Max<ui64>())
{}
private:
bool Next(NUdf::TUnboxedValue& key) override {
if (NUdf::TBoxedValueAccessor::Skip(*Iter)) {
key = NUdf::TUnboxedValuePod(++Index);
return true;
}
return false;
}
bool NextPair(NUdf::TUnboxedValue& key, NUdf::TUnboxedValue& payload) override {
if (NUdf::TBoxedValueAccessor::Next(*Iter, payload)) {
key = NUdf::TUnboxedValuePod(++Index);
return true;
}
return false;
}
bool Skip() override {
if (NUdf::TBoxedValueAccessor::Skip(*Iter)) {
++Index;
return true;
}
return false;
}
THolder<TIterator> Iter;
ui64 Index;
};
TVectorListAdapter(
TMemoryUsageInfo* memInfo,
const TVectorType& list,
TItemFactory itemFactory,
ui64 start, ui64 finish,
bool reversed)
: TBase(memInfo)
, List(list)
, ItemFactory(itemFactory)
, Start(start)
, Finish(finish)
, Reversed(reversed)
{
Y_ABORT_UNLESS(Start <= Finish && Finish <= List.size());
}
private:
bool HasFastListLength() const override {
return true;
}
ui64 GetListLength() const override {
return Finish - Start;
}
ui64 GetEstimatedListLength() const override {
return Finish - Start;
}
bool HasListItems() const override {
return Finish != Start;
}
NUdf::IBoxedValuePtr ReverseListImpl(const NUdf::IValueBuilder& builder) const override {
Y_UNUSED(builder);
return new TSelf(this->GetMemInfo(), List, ItemFactory, Start, Finish, !Reversed);
}
NUdf::IBoxedValuePtr SkipListImpl(const NUdf::IValueBuilder& builder, ui64 count) const override {
Y_UNUSED(builder);
const ui64 newStart = Min(Start + count, Finish);
if (newStart == Start) {
return const_cast<TVectorListAdapter*>(this);
}
return new TSelf(this->GetMemInfo(), List, ItemFactory, newStart, Finish, Reversed);
}
NUdf::IBoxedValuePtr TakeListImpl(const NUdf::IValueBuilder& builder, ui64 count) const override {
Y_UNUSED(builder);
const ui64 newFinish = Min(Start + count, Finish);
if (newFinish == Finish) {
return const_cast<TVectorListAdapter*>(this);
}
return new TSelf(this->GetMemInfo(), List, ItemFactory, Start, newFinish, Reversed);
}
NUdf::IBoxedValuePtr ToIndexDictImpl(const NUdf::IValueBuilder& builder) const override {
Y_UNUSED(builder);
return const_cast<TVectorListAdapter*>(this);
}
NUdf::TUnboxedValue GetListIterator() const override {
return NUdf::TUnboxedValuePod(new TIterator(this->GetMemInfo(), List, ItemFactory, Start, Finish, Reversed));
}
bool Contains(const NUdf::TUnboxedValuePod& key) const override {
const ui64 index = key.Get<ui64>();
return (index < GetListLength());
}
NUdf::TUnboxedValue Lookup(const NUdf::TUnboxedValuePod& key) const override {
const ui64 index = key.Get<ui64>();
if (index >= GetListLength()) {
return NUdf::TUnboxedValuePod();
}
const ui64 realIndex = Reversed ? (Finish - 1 - index) : (Start + index);
return ItemFactory(List[realIndex]).Release().MakeOptional();
}
NUdf::TUnboxedValue GetKeysIterator() const override {
return NUdf::TUnboxedValuePod(new TDictIterator(this->GetMemInfo(), MakeHolder<TIterator>(this->GetMemInfo(), List, ItemFactory, Start, Finish, Reversed)));
}
NUdf::TUnboxedValue GetDictIterator() const override {
return NUdf::TUnboxedValuePod(new TDictIterator(this->GetMemInfo(), MakeHolder<TIterator>(this->GetMemInfo(), List, ItemFactory, Start, Finish, Reversed)));
}
ui64 GetDictLength() const override {
return GetListLength();
}
bool HasDictItems() const override {
return Finish != Start;
}
bool IsSortedDict() const override {
return true;
}
private:
const TVectorType& List;
const TItemFactory ItemFactory;
const ui64 Start;
const ui64 Finish;
const bool Reversed;
};
template <typename TVectorType>
class TOwningVectorListAdapter : private TVectorType, public TVectorListAdapter<TVectorType> {
public:
using TAdapterBase = TVectorListAdapter<TVectorType>;
TOwningVectorListAdapter(
TMemoryUsageInfo* memInfo,
TVectorType&& list,
typename TAdapterBase::TItemFactory itemFactory,
ui64 start, ui64 finish,
bool reversed)
: TVectorType(std::move(list))
, TAdapterBase(memInfo, *this, itemFactory, start, finish, reversed) {}
TOwningVectorListAdapter(
TMemoryUsageInfo* memInfo,
const TVectorType& list,
typename TAdapterBase::TItemFactory itemFactory,
ui64 start, ui64 finish,
bool reversed)
: TVectorType(list)
, TAdapterBase(memInfo, *this, itemFactory, start, finish, reversed) {}
};
template<typename TVectorType>
NUdf::TUnboxedValue CreateOwningVectorListAdapter(
TVectorType&& list,
typename TVectorListAdapter<std::remove_reference_t<TVectorType>>::TItemFactory itemFactory,
ui64 start, ui64 finish,
bool reversed,
TMemoryUsageInfo& memInfo)
{
return NUdf::TUnboxedValuePod(new TOwningVectorListAdapter<std::remove_reference_t<TVectorType>>(
&memInfo, std::forward<TVectorType>(list), itemFactory, start, finish, reversed));
}
}
}
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