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#include "py_variant.h"
#include "py_cast.h"
#include "py_errors.h"
#include "py_utils.h"
#include <yql/essentials/public/udf/udf_value.h>
#include <yql/essentials/public/udf/udf_value_builder.h>
#include <yql/essentials/public/udf/udf_type_inspection.h>
using namespace NKikimr;
namespace NPython {
//////////////////////////////////////////////////////////////////////////////
// public functions
//////////////////////////////////////////////////////////////////////////////
TPyObjectPtr ToPyVariant(
const TPyCastContext::TPtr& castCtx,
const NUdf::TType* type,
const NUdf::TUnboxedValuePod& value)
{
auto& th = *castCtx->PyCtx->TypeInfoHelper;
NUdf::TVariantTypeInspector varInsp(th, type);
const NUdf::TType* subType = varInsp.GetUnderlyingType();
ui32 index = value.GetVariantIndex();
auto item = value.GetVariantItem();
const NUdf::TType* itemType = nullptr;
if (auto tupleInsp = NUdf::TTupleTypeInspector(th, subType)) {
itemType = tupleInsp.GetElementType(index);
TPyObjectPtr pyIndex = PyCast<ui32>(index);
TPyObjectPtr pyItem = ToPyObject(castCtx, itemType, item);
return PyTuple_Pack(2, pyIndex.Get(), pyItem.Get());
} else if (auto structInsp = NUdf::TStructTypeInspector(th, subType)) {
itemType = structInsp.GetMemberType(index);
TPyObjectPtr pyName = ToPyUnicode<NUdf::TStringRef>(
structInsp.GetMemberName(index));
TPyObjectPtr pyItem = ToPyObject(castCtx, itemType, item);
return PyTuple_Pack(2, pyName.Get(), pyItem.Get());
}
throw yexception() << "Cannot get Variant item type";
}
NUdf::TUnboxedValue FromPyVariant(
const TPyCastContext::TPtr& castCtx,
const NUdf::TType* type,
PyObject* value)
{
PY_ENSURE(PyTuple_Check(value),
"Expected to get Tuple, but got " << Py_TYPE(value)->tp_name);
Py_ssize_t tupleSize = PyTuple_GET_SIZE(value);
PY_ENSURE(tupleSize == 2,
"Expected to get Tuple with 2 elements, but got "
<< tupleSize << " elements");
auto& th = *castCtx->PyCtx->TypeInfoHelper;
NUdf::TVariantTypeInspector varInsp(th, type);
const NUdf::TType* subType = varInsp.GetUnderlyingType();
PyObject* el0 = PyTuple_GET_ITEM(value, 0);
PyObject* el1 = PyTuple_GET_ITEM(value, 1);
ui32 index;
NUdf::TStringRef name;
if (TryPyCast(el0, index)) {
if (auto tupleInsp = NUdf::TTupleTypeInspector(th, subType)) {
PY_ENSURE(index < tupleInsp.GetElementsCount(),
"Index must be < " << tupleInsp.GetElementsCount()
<< ", but got " << index);
auto* itemType = tupleInsp.GetElementType(index);
return castCtx->ValueBuilder->NewVariant(index, FromPyObject(castCtx, itemType, el1));
} else {
throw yexception() << "Cannot convert " << PyObjectRepr(value)
<< " underlying Variant type is not a Tuple";
}
} else if (TryPyCast(el0, name)) {
if (auto structInsp = NUdf::TStructTypeInspector(th, subType)) {
ui32 index = structInsp.GetMemberIndex(name);
PY_ENSURE(index < structInsp.GetMembersCount(),
"Unknown member name: " << TStringBuf(name));
auto* itemType = structInsp.GetMemberType(index);
return castCtx->ValueBuilder->NewVariant(index, FromPyObject(castCtx, itemType, el1));
} else {
throw yexception() << "Cannot convert " << PyObjectRepr(value)
<< " underlying Variant type is not a Struct";
}
} else {
throw yexception()
<< "Expected first Tuple element to either be an int "
"or a str, but got " << Py_TYPE(el0)->tp_name;
}
}
} // namspace NPython
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