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#pragma once
#include "resource.h"
#include "compile_path.h"
#include <yql/essentials/public/udf/udf_type_builder.h>
#include <yql/essentials/public/udf/udf_value.h>
#include <yql/essentials/public/udf/udf_helpers.h>
#include <yql/essentials/minikql/dom/node.h>
#include <yql/essentials/types/binary_json/read.h>
#include <util/generic/yexception.h>
#include <util/generic/ylimits.h>
#include <util/string/cast.h>
namespace NJson2Udf {
using namespace NKikimr;
using namespace NUdf;
using namespace NYql;
using namespace NDom;
using namespace NJsonPath;
namespace {
template <class TValueType, bool ForceConvert = false>
TUnboxedValue TryConvertJson(const IValueBuilder* valueBuilder, const TUnboxedValue& source) {
Y_UNUSED(valueBuilder);
Y_UNUSED(source);
Y_ABORT("Unsupported type");
}
template <>
TUnboxedValue TryConvertJson<TUtf8>(const IValueBuilder* valueBuilder, const TUnboxedValue& source) {
Y_UNUSED(valueBuilder);
if (IsNodeType(source, ENodeType::String)) {
return source;
}
return {};
}
template <>
TUnboxedValue TryConvertJson<TUtf8, true>(const IValueBuilder* valueBuilder, const TUnboxedValue& source) {
switch (GetNodeType(source)) {
case ENodeType::String:
return source;
case ENodeType::Uint64:
return valueBuilder->NewString(ToString(source.Get<ui64>())).Release();
case ENodeType::Int64:
return valueBuilder->NewString(ToString(source.Get<i64>())).Release();
case ENodeType::Bool:
return source.Get<bool>() ? TUnboxedValuePod::Embedded("true") : TUnboxedValuePod::Embedded("false");
case ENodeType::Double:
return valueBuilder->NewString(ToString(source.Get<double>())).Release();
case ENodeType::Entity:
return TUnboxedValuePod::Embedded("null");
case ENodeType::List:
case ENodeType::Dict:
case ENodeType::Attr:
return {};
}
}
template <>
TUnboxedValue TryConvertJson<i64>(const IValueBuilder* valueBuilder, const TUnboxedValue& source) {
Y_UNUSED(valueBuilder);
if (!source.IsEmbedded()) {
return {};
}
if (IsNodeType(source, ENodeType::Int64)) {
return TUnboxedValuePod(source.Get<i64>());
} else if (IsNodeType(source, ENodeType::Uint64) && source.Get<ui64>() < Max<i64>()) {
return TUnboxedValuePod(static_cast<i64>(source.Get<ui64>()));
} else if (IsNodeType(source, ENodeType::Double) && static_cast<i64>(source.Get<double>()) == source.Get<double>()) {
return TUnboxedValuePod(static_cast<i64>(source.Get<double>()));
}
return {};
}
template <>
TUnboxedValue TryConvertJson<double>(const IValueBuilder* valueBuilder, const TUnboxedValue& source) {
Y_UNUSED(valueBuilder);
if (!source.IsEmbedded()) {
return {};
}
if (IsNodeType(source, ENodeType::Double)) {
return TUnboxedValuePod(source.Get<double>());
} else if (IsNodeType(source, ENodeType::Int64)) {
return TUnboxedValuePod(static_cast<double>(source.Get<i64>()));
} else if (IsNodeType(source, ENodeType::Uint64)) {
return TUnboxedValuePod(static_cast<double>(source.Get<ui64>()));
}
return {};
}
template <>
TUnboxedValue TryConvertJson<bool>(const IValueBuilder* valueBuilder, const TUnboxedValue& source) {
Y_UNUSED(valueBuilder);
if (!source.IsEmbedded() || !IsNodeType(source, ENodeType::Bool)) {
return {};
}
return {TUnboxedValuePod(source.Get<bool>())};
}
}
template <EDataSlot InputType, class TValueType, bool ForceConvert = false>
class TSqlValue: public TBoxedValue {
public:
enum class TErrorCode : ui8 {
Empty = 0,
Error = 1
};
TSqlValue(TSourcePosition pos)
: Pos_(pos)
{
}
static TStringRef Name();
static bool DeclareSignature(
const TStringRef& name,
TType* userType,
IFunctionTypeInfoBuilder& builder,
bool typesOnly) {
Y_UNUSED(userType);
if (name != Name()) {
return false;
}
auto optionalValueType = builder.Optional()->Item<TValueType>().Build();
auto errorTupleType = builder.Tuple(2)->Add<ui8>().Add<char*>().Build();
auto returnTypeTuple = builder.Tuple(2)
->Add(errorTupleType)
.Add(optionalValueType)
.Build();
auto returnType = builder.Variant()->Over(returnTypeTuple).Build();
TType* jsonType = nullptr;
if constexpr (InputType == EDataSlot::Json) {
jsonType = builder.Resource(JSON_NODE_RESOURCE_NAME);
} else {
jsonType = builder.SimpleType<TJsonDocument>();
}
auto optionalJsonType = builder.Optional()->Item(jsonType).Build();
auto jsonPathType = builder.Resource(JSONPATH_RESOURCE_NAME);
auto dictType = builder.Dict()->Key<TUtf8>().Value(builder.Resource(JSON_NODE_RESOURCE_NAME)).Build();
builder.Args()
->Add(optionalJsonType)
.Add(jsonPathType)
.Add(dictType)
.Done()
.Returns(returnType);
builder.IsStrict();
if (!typesOnly) {
builder.Implementation(new TSqlValue(builder.GetSourcePosition()));
}
return true;
}
private:
TUnboxedValue BuildErrorResult(const IValueBuilder* valueBuilder, TErrorCode code, const TStringBuf message) const {
TUnboxedValue* items = nullptr;
auto errorTuple = valueBuilder->NewArray(2, items);
items[0] = TUnboxedValuePod(static_cast<ui8>(code));
items[1] = valueBuilder->NewString(message);
return valueBuilder->NewVariant(0, std::move(errorTuple));
}
TUnboxedValue BuildSuccessfulResult(const IValueBuilder* valueBuilder, TUnboxedValue&& value) const {
return valueBuilder->NewVariant(1, std::move(value));
}
TUnboxedValue Run(
const IValueBuilder* valueBuilder,
const TUnboxedValuePod* args) const final {
try {
if (!args[0].HasValue()) {
return BuildSuccessfulResult(valueBuilder, TUnboxedValuePod());
}
TValue jsonDom;
if constexpr (InputType == EDataSlot::JsonDocument) {
jsonDom = TValue(NBinaryJson::TBinaryJsonReader::Make(args[0].AsStringRef())->GetRootCursor());
} else {
jsonDom = TValue(args[0]);
}
auto* jsonPathResource = static_cast<TJsonPathResource*>(args[1].AsBoxed().Get());
const auto& jsonPath = *jsonPathResource->Get();
const auto variables = DictToVariables(args[2]);
const auto result = ExecuteJsonPath(jsonPath, jsonDom, variables, valueBuilder);
if (result.IsError()) {
return BuildErrorResult(valueBuilder, TErrorCode::Error, TStringBuilder() << "Error executing jsonpath:" << Endl << result.GetError() << Endl);
}
const auto& nodes = result.GetNodes();
if (nodes.empty()) {
return BuildErrorResult(valueBuilder, TErrorCode::Empty, "Result is empty");
}
if (nodes.size() > 1) {
return BuildErrorResult(valueBuilder, TErrorCode::Error, "Result consists of multiple items");
}
const auto& value = nodes[0];
if (value.Is(EValueType::Array) || value.Is(EValueType::Object)) {
// SqlValue can return only scalar values
return BuildErrorResult(valueBuilder, TErrorCode::Error, "Extracted JSON value is either object or array");
}
if (value.Is(EValueType::Null)) {
// JSON nulls must be converted to SQL nulls
return BuildSuccessfulResult(valueBuilder, TUnboxedValuePod());
}
const auto source = value.ConvertToUnboxedValue(valueBuilder);
TUnboxedValue convertedValue = TryConvertJson<TValueType, ForceConvert>(valueBuilder, source);
if (!convertedValue) {
// error while converting JSON value type to TValueType
return BuildErrorResult(valueBuilder, TErrorCode::Error, "Cannot convert extracted JSON value to target type");
}
return BuildSuccessfulResult(valueBuilder, std::move(convertedValue));
} catch (const std::exception& e) {
UdfTerminate((TStringBuilder() << Pos_ << " " << e.what()).data());
}
}
TSourcePosition Pos_;
};
template <EDataSlot InputType, class TValueType, bool ForceConvert>
TStringRef TSqlValue<InputType, TValueType, ForceConvert>::Name() {
Y_ABORT("Unknown name");
}
template<>
TStringRef TSqlValue<EDataSlot::Json, TUtf8, true>::Name() {
return TStringRef::Of("SqlValueConvertToUtf8");
}
template <>
TStringRef TSqlValue<EDataSlot::Json, TUtf8>::Name() {
return TStringRef::Of("SqlValueUtf8");
}
template <>
TStringRef TSqlValue<EDataSlot::Json, i64>::Name() {
return TStringRef::Of("SqlValueInt64");
}
template <>
TStringRef TSqlValue<EDataSlot::Json, double>::Name() {
return TStringRef::Of("SqlValueNumber");
}
template <>
TStringRef TSqlValue<EDataSlot::Json, bool>::Name() {
return TStringRef::Of("SqlValueBool");
}
template<>
TStringRef TSqlValue<EDataSlot::JsonDocument, TUtf8, true>::Name() {
return TStringRef::Of("JsonDocumentSqlValueConvertToUtf8");
}
template <>
TStringRef TSqlValue<EDataSlot::JsonDocument, TUtf8>::Name() {
return TStringRef::Of("JsonDocumentSqlValueUtf8");
}
template <>
TStringRef TSqlValue<EDataSlot::JsonDocument, i64>::Name() {
return TStringRef::Of("JsonDocumentSqlValueInt64");
}
template <>
TStringRef TSqlValue<EDataSlot::JsonDocument, double>::Name() {
return TStringRef::Of("JsonDocumentSqlValueNumber");
}
template <>
TStringRef TSqlValue<EDataSlot::JsonDocument, bool>::Name() {
return TStringRef::Of("JsonDocumentSqlValueBool");
}
}
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