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#include <yql/essentials/public/udf/udf_value.h>
#include <yql/essentials/public/udf/udf_value_builder.h>
#include <yql/essentials/public/udf/udf_type_builder.h>
#include <yql/essentials/public/udf/udf_registrator.h>
#include <util/generic/yexception.h>
#include <util/string/cast.h>
using namespace NKikimr;
using namespace NUdf;
namespace {
struct TPersonInfo
{
ui32 FirstName = 0;
ui32 LastName = 0;
ui32 Age = 0;
bool RemapKSV = false;
ui32 Key = 0;
ui32 Subkey = 0;
ui32 Value = 0;
static constexpr ui32 FieldsCount = 3U;
};
//////////////////////////////////////////////////////////////////////////////
// TPersonMember
//////////////////////////////////////////////////////////////////////////////
class TPersonMember: public TBoxedValue
{
public:
explicit TPersonMember(ui32 memberIndex)
: MemberIndex_(memberIndex)
{
}
private:
TUnboxedValue Run(
const IValueBuilder* valueBuilder,
const TUnboxedValuePod* args) const override
{
Y_UNUSED(valueBuilder);
return args[0].GetElement(MemberIndex_);
}
const ui32 MemberIndex_;
};
//////////////////////////////////////////////////////////////////////////////
// TNewPerson
//////////////////////////////////////////////////////////////////////////////
class TNewPerson: public TBoxedValue
{
public:
explicit TNewPerson(const TPersonInfo& personIndexes)
: Info_(personIndexes)
{
}
private:
TUnboxedValue Run(
const IValueBuilder* valueBuilder,
const TUnboxedValuePod* args) const override
{
TUnboxedValue name, surname, age;
if (Info_.RemapKSV) {
name = args->GetElement(Info_.Key);
surname = args->GetElement(Info_.Subkey);
const auto ageStr = args->GetElement(Info_.Value);
const ui32 ageNum = FromString(ageStr.AsStringRef().Data(), ageStr.AsStringRef().Size());
age = TUnboxedValuePod(ageNum);
} else {
name = TUnboxedValuePod(args[0]);
surname = TUnboxedValuePod(args[1]);
age = TUnboxedValuePod(args[2]);
}
TUnboxedValue* items = nullptr;
auto result = valueBuilder->NewArray(Info_.FieldsCount, items);
items[Info_.FirstName] = std::move(name);
items[Info_.LastName] = std::move(surname);
items[Info_.Age] = std::move(age);
return result;
}
const TPersonInfo Info_;
};
//////////////////////////////////////////////////////////////////////////////
// TPersonModule
//////////////////////////////////////////////////////////////////////////////
class TPersonModule: public IUdfModule
{
public:
TStringRef Name() const {
return TStringRef::Of("Person");
}
void CleanupOnTerminate() const final {}
void GetAllFunctions(IFunctionsSink& sink) const final {
sink.Add(TStringRef::Of("FirstName"));
sink.Add(TStringRef::Of("LastName"));
sink.Add(TStringRef::Of("Age"));
sink.Add(TStringRef::Of("New"))->SetTypeAwareness();
}
void BuildFunctionTypeInfo(
const TStringRef& name,
TType* userType,
const TStringRef& typeConfig,
ui32 flags,
IFunctionTypeInfoBuilder& builder) const final
{
Y_UNUSED(userType);
try {
bool typesOnly = (flags & TFlags::TypesOnly);
TPersonInfo personInfo;
auto personType = builder.Struct(personInfo.FieldsCount)->
AddField<char*>("FirstName", &personInfo.FirstName)
.AddField<char*>("LastName", &personInfo.LastName)
.AddField<ui32>("Age", &personInfo.Age)
.Build();
if (TStringRef::Of("FirstName") == name) {
// function signature: String FirstName(PersonStruct p)
// runConfig: void
builder.Returns<char*>().Args()->Add(personType).Done();
if (!typesOnly) {
builder.Implementation(new TPersonMember(personInfo.FirstName));
}
}
else if (TStringRef::Of("LastName") == name) {
// function signature: String LastName(PersonStruct p)
// runConfig: void
builder.Returns<char*>().Args()->Add(personType).Done();
if (!typesOnly) {
builder.Implementation(new TPersonMember(personInfo.LastName));
}
}
else if (TStringRef::Of("Age") == name) {
// function signature: ui32 Age(PersonStruct p)
// runConfig: void
builder.Returns<ui32>().Args()->Add(personType).Done();
if (!typesOnly) {
builder.Implementation(new TPersonMember(personInfo.Age));
}
}
else if (TStringRef::Of("New") == name) {
// function signature:
// PersonStruct New(String firstName, String lastName, ui32 age)
// runConfig: void
builder.Returns(personType);
if (TStringRef::Of("RemapKSV") == typeConfig) {
personInfo.RemapKSV = true;
auto inputType = builder.Struct(personInfo.FieldsCount)->
AddField<char*>("key", &personInfo.Key)
.AddField<char*>("subkey", &personInfo.Subkey)
.AddField<char*>("value", &personInfo.Value)
.Build();
builder.Args()->Add(inputType);
} else {
builder.Args()->Add<char*>().Add<char*>().Add<ui32>();
}
builder.RunConfig<void>(); // this is optional because default runConfigType is Void
if (!typesOnly) {
builder.Implementation(new TNewPerson(personInfo));
}
}
} catch (const std::exception& e) {
builder.SetError(CurrentExceptionMessage());
}
}
};
} // namespace
REGISTER_MODULES(TPersonModule)
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