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#include <yql/essentials/public/udf/udf_type_ops.h>
#include <yql/essentials/public/udf/udf_helpers.h>
#include <vector>
using namespace NKikimr;
using namespace NUdf;
namespace {
class TVector {
private:
std::vector<TUnboxedValue, TUnboxedValue::TAllocator> Vector;
public:
TVector()
: Vector()
{}
TUnboxedValue GetResult(const IValueBuilder* builder) {
TUnboxedValue* values = nullptr;
auto list = builder->NewArray(Vector.size(), values);
std::copy(Vector.begin(), Vector.end(), values);
return list;
}
void Emplace(const ui64 index, const TUnboxedValuePod& value) {
if (index < Vector.size()) {
Vector[index] = value;
} else {
Vector.push_back(value);
}
}
void Swap(const ui64 a, const ui64 b) {
if (a < Vector.size() && b < Vector.size()) {
std::swap(Vector[a], Vector[b]);
}
}
void Reserve(ui64 expectedSize) {
Vector.reserve(expectedSize);
}
};
extern const char VectorResourceName[] = "Vector.VectorResource";
class TVectorResource:
public TBoxedResource<TVector, VectorResourceName>
{
public:
template <typename... Args>
inline TVectorResource(Args&&... args)
: TBoxedResource(std::forward<Args>(args)...)
{}
};
TVectorResource* GetVectorResource(const TUnboxedValuePod& arg) {
TVectorResource::Validate(arg);
return static_cast<TVectorResource*>(arg.AsBoxed().Get());
}
class TVectorCreate: public TBoxedValue {
private:
TUnboxedValue Run(const IValueBuilder*, const TUnboxedValuePod* args) const override {
auto resource = new TVectorResource;
resource->Get()->Reserve(args[0].Get<ui64>());
return TUnboxedValuePod(resource);
}
};
class TVectorEmplace: public TBoxedValue {
private:
TUnboxedValue Run(const IValueBuilder*, const TUnboxedValuePod* args) const override {
auto resource = GetVectorResource(args[0]);
resource->Get()->Emplace(args[1].Get<ui64>(), args[2]);
return TUnboxedValuePod(resource);
}
};
class TVectorSwap: public TBoxedValue {
private:
TUnboxedValue Run(const IValueBuilder*, const TUnboxedValuePod* args) const override {
auto resource = GetVectorResource(args[0]);
resource->Get()->Swap(args[1].Get<ui64>(), args[2].Get<ui64>());
return TUnboxedValuePod(resource);
}
};
class TVectorGetResult: public TBoxedValue {
private:
TUnboxedValue Run(const IValueBuilder* valueBuilder, const TUnboxedValuePod* args) const override {
return GetVectorResource(args[0])->Get()->GetResult(valueBuilder);
}
};
static const auto CreateName = TStringRef::Of("Create");
static const auto EmplaceName = TStringRef::Of("Emplace");
static const auto SwapName = TStringRef::Of("Swap");
static const auto GetResultName = TStringRef::Of("GetResult");
class TVectorModule: public IUdfModule {
public:
TStringRef Name() const {
return TStringRef::Of("Vector");
}
void CleanupOnTerminate() const final {
}
void GetAllFunctions(IFunctionsSink& sink) const final {
sink.Add(CreateName)->SetTypeAwareness();
sink.Add(EmplaceName)->SetTypeAwareness();
sink.Add(SwapName)->SetTypeAwareness();
sink.Add(GetResultName)->SetTypeAwareness();
}
void BuildFunctionTypeInfo(
const TStringRef& name,
TType* userType,
const TStringRef& typeConfig,
ui32 flags,
IFunctionTypeInfoBuilder& builder) const final
{
Y_UNUSED(typeConfig);
try {
const bool typesOnly = (flags & TFlags::TypesOnly);
builder.UserType(userType);
auto typeHelper = builder.TypeInfoHelper();
auto userTypeInspector = TTupleTypeInspector(*typeHelper, userType);
if (!userTypeInspector || userTypeInspector.GetElementsCount() != 3) {
builder.SetError("User type is not a 3-tuple");
return;
}
auto valueType = userTypeInspector.GetElementType(2);
TType* vectorType = builder.Resource(VectorResourceName);
if (name == CreateName) {
builder.IsStrict();
builder.Args()->Add<ui64>().Done().Returns(vectorType);
if (!typesOnly) {
builder.Implementation(new TVectorCreate);
}
}
if (name == EmplaceName) {
builder.IsStrict();
builder.Args()->Add(vectorType).Add<ui64>().Add(valueType).Done().Returns(vectorType);
if (!typesOnly) {
builder.Implementation(new TVectorEmplace);
}
}
if (name == SwapName) {
builder.IsStrict();
builder.Args()->Add(vectorType).Add<ui64>().Add<ui64>().Done().Returns(vectorType);
if (!typesOnly) {
builder.Implementation(new TVectorSwap);
}
}
if (name == GetResultName) {
auto resultType = builder.List()->Item(valueType).Build();
builder.IsStrict();
builder.Args()->Add(vectorType).Done().Returns(resultType);
if (!typesOnly) {
builder.Implementation(new TVectorGetResult);
}
}
} catch (const std::exception& e) {
builder.SetError(CurrentExceptionMessage());
}
}
};
} // namespace
REGISTER_MODULES(TVectorModule)
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