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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
#include "contrib/libs/apache/arrow_next/src/arrow/util/config.h"
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/compute/function_internal.h"
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/array/util.h"
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/compute/function.h"
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/compute/registry.h"
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/io/memory.h"
#ifdef ARROW_IPC
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/ipc/reader.h"
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/ipc/writer.h"
#endif
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/record_batch.h"
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/scalar.h"
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/util/checked_cast.h"
namespace arrow20 {
namespace compute {
namespace internal {
using ::arrow20::internal::checked_cast;
constexpr char kTypeNameField[] = "_type_name";
Result<std::shared_ptr<StructScalar>> FunctionOptionsToStructScalar(
const FunctionOptions& options) {
std::vector<std::string> field_names;
std::vector<std::shared_ptr<Scalar>> values;
const auto* options_type =
dynamic_cast<const GenericOptionsType*>(options.options_type());
if (!options_type) {
return Status::NotImplemented("serializing ", options.type_name(),
" to StructScalar");
}
RETURN_NOT_OK(options_type->ToStructScalar(options, &field_names, &values));
field_names.push_back(kTypeNameField);
const char* options_name = options.type_name();
values.emplace_back(
new BinaryScalar(Buffer::Wrap(options_name, std::strlen(options_name))));
return StructScalar::Make(std::move(values), std::move(field_names));
}
Result<std::unique_ptr<FunctionOptions>> FunctionOptionsFromStructScalar(
const StructScalar& scalar) {
ARROW_ASSIGN_OR_RAISE(auto type_name_holder, scalar.field(kTypeNameField));
const std::string type_name =
checked_cast<const BinaryScalar&>(*type_name_holder).value->ToString();
ARROW_ASSIGN_OR_RAISE(auto raw_options_type,
GetFunctionRegistry()->GetFunctionOptionsType(type_name));
const auto* options_type = checked_cast<const GenericOptionsType*>(raw_options_type);
return options_type->FromStructScalar(scalar);
}
Result<std::shared_ptr<Buffer>> GenericOptionsType::Serialize(
const FunctionOptions& options) const {
#ifdef ARROW_IPC
ARROW_ASSIGN_OR_RAISE(auto scalar, FunctionOptionsToStructScalar(options));
ARROW_ASSIGN_OR_RAISE(auto array, MakeArrayFromScalar(*scalar, 1));
auto batch =
RecordBatch::Make(schema({field("", array->type())}), /*num_rows=*/1, {array});
ARROW_ASSIGN_OR_RAISE(auto stream, io::BufferOutputStream::Create());
ARROW_ASSIGN_OR_RAISE(auto writer, ipc::MakeFileWriter(stream, batch->schema()));
RETURN_NOT_OK(writer->WriteRecordBatch(*batch));
RETURN_NOT_OK(writer->Close());
return stream->Finish();
#else
return Status::NotImplemented("IPC feature isn't enabled");
#endif
}
Result<std::unique_ptr<FunctionOptions>> GenericOptionsType::Deserialize(
const Buffer& buffer) const {
return DeserializeFunctionOptions(buffer);
}
Result<std::unique_ptr<FunctionOptions>> DeserializeFunctionOptions(
const Buffer& buffer) {
#ifdef ARROW_IPC
// Copying the buffer here is not ideal, but we need to do it to avoid
// use-after-free issues with the zero-copy buffer read.
auto stream = io::BufferReader::FromString(buffer.ToString());
ARROW_ASSIGN_OR_RAISE(auto reader, ipc::RecordBatchFileReader::Open(stream.get()));
ARROW_ASSIGN_OR_RAISE(auto batch, reader->ReadRecordBatch(0));
if (batch->num_rows() != 1) {
return Status::Invalid(
"serialized FunctionOptions's batch repr was not a single row - had ",
batch->num_rows());
}
if (batch->num_columns() != 1) {
return Status::Invalid(
"serialized FunctionOptions's batch repr was not a single column - had ",
batch->num_columns());
}
auto column = batch->column(0);
if (column->type()->id() != Type::STRUCT) {
return Status::Invalid(
"serialized FunctionOptions's batch repr was not a struct column - was ",
column->type()->ToString());
}
ARROW_ASSIGN_OR_RAISE(auto raw_scalar,
checked_cast<const StructArray&>(*column).GetScalar(0));
auto scalar = checked_cast<const StructScalar&>(*raw_scalar);
return FunctionOptionsFromStructScalar(scalar);
#else
return Status::NotImplemented("IPC feature isn't enabled");
#endif
}
Status CheckAllArrayOrScalar(const std::vector<Datum>& values) {
for (const auto& value : values) {
if (!value.is_value()) {
return Status::TypeError(
"Tried executing function with non-array, non-scalar type: ", value.ToString());
}
}
return Status::OK();
}
Result<std::vector<TypeHolder>> GetFunctionArgumentTypes(const std::vector<Datum>& args) {
// type-check Datum arguments here. Really we'd like to avoid this as much as
// possible
RETURN_NOT_OK(CheckAllArrayOrScalar(args));
std::vector<TypeHolder> inputs(args.size());
for (size_t i = 0; i != args.size(); ++i) {
inputs[i] = TypeHolder(args[i].type());
}
return inputs;
}
} // namespace internal
} // namespace compute
} // namespace arrow20
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