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#pragma once
#include "type_builder.h"
#include "value_builder.h"
#include <yql/essentials/public/udf/udf_value.h>
#include <yql/essentials/public/udf/udf_registrator.h>
#include <google/protobuf/message.h>
#include <google/protobuf/text_format.h>
#include <google/protobuf/io/zero_copy_stream_impl_lite.h>
namespace NYql {
namespace NUdf {
class TProtobufBase : public IUdfModule {
public:
void CleanupOnTerminate() const override;
void GetAllFunctions(IFunctionsSink& sink) const override;
void BuildFunctionTypeInfo(
const TStringRef& name,
TType* userType,
const TStringRef& typeConfig,
ui32 flags,
IFunctionTypeInfoBuilder& builder) const override;
protected:
virtual const NProtoBuf::Descriptor* GetDescriptor() const = 0;
virtual TProtobufValue* CreateValue(const TProtoInfo& info, bool asText) const = 0;
virtual TProtobufSerialize* CreateSerialize(const TProtoInfo& info, bool asText) const = 0;
};
template <typename T>
class TProtobufModule : public TProtobufBase {
class TValue : public TProtobufValue {
public:
TValue(const TProtoInfo& info, bool asText)
: TProtobufValue(info)
, AsText_(asText)
{
}
TAutoPtr<NProtoBuf::Message> Parse(const TStringBuf& data) const override {
TAutoPtr<T> proto(new T);
if (AsText_) {
NProtoBuf::io::ArrayInputStream si(data.data(), data.size());
if (!NProtoBuf::TextFormat::Parse(&si, proto.Get())) {
ythrow yexception() << "can't parse text protobuf";
}
} else {
if (!proto->ParseFromArray(data.data(), data.size())) {
ythrow yexception() << "can't parse binary protobuf";
}
}
return proto.Release();
}
private:
const bool AsText_;
};
class TSerialize : public TProtobufSerialize {
public:
TSerialize(const TProtoInfo& info, bool asText)
: TProtobufSerialize(info)
, AsText_(asText)
{
}
TMaybe<TString> Serialize(const NProtoBuf::Message& proto) const override {
TString result;
if (AsText_) {
if (!NProtoBuf::TextFormat::PrintToString(proto, &result)) {
ythrow yexception() << "can't serialize prototext message";
}
} else {
result.ReserveAndResize(proto.ByteSize());
if (!proto.SerializeToArray(result.begin(), result.size())) {
ythrow yexception() << "can't serialize protobin message";
}
}
return result;
}
TAutoPtr<NProtoBuf::Message> MakeProto() const override {
return TAutoPtr<NProtoBuf::Message>(new T);
}
private:
const bool AsText_;
};
private:
const NProtoBuf::Descriptor* GetDescriptor() const override {
return T::descriptor();
}
TProtobufValue* CreateValue(const TProtoInfo& info, bool asText) const override {
return new TValue(info, asText);
}
TProtobufSerialize* CreateSerialize(const TProtoInfo& info, bool asText) const override {
return new TSerialize(info, asText);
}
};
} // namespace NUdf
} // namespace NYql
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