Program Listing for File serializers.hpp

            

            
/*
* SPDX-FileCopyrightText: Copyright (c) 2022-2024, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
* SPDX-License-Identifier: Apache-2.0
*
* Licensed 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.
*/

#pragma once

#include "morpheus/export.h"
#include "morpheus/objects/file_types.hpp"
#include "morpheus/objects/table_info.hpp"
#include "morpheus/utilities/string_util.hpp"

#include <pybind11/pytypes.h>

#include <fstream> // IWYU pragma: keep
#include <sstream>
#include <stdexcept>
#include <string>
#include <utility>

namespace morpheus {

void MORPHEUS_EXPORT df_to_csv(const TableInfo& tbl,
                               std::ostream& out_stream,
                               bool include_header,
                               bool include_index_col = true,
                               bool flush             = false);

std::string MORPHEUS_EXPORT df_to_csv(const TableInfo& tbl, bool include_header, bool include_index_col = true);

void MORPHEUS_EXPORT df_to_json(const TableInfo& tbl,
                                std::ostream& out_stream,
                                bool include_index_col = true,
                                bool flush             = false);

std::string MORPHEUS_EXPORT df_to_json(const TableInfo& tbl, bool include_index_col = true);

void MORPHEUS_EXPORT df_to_parquet(const TableInfo& tbl,
                                   std::ostream& out_stream,
                                   bool include_header,
                                   bool include_index_col = true,
                                   bool flush             = false);

std::string MORPHEUS_EXPORT df_to_parquet(const TableInfo& tbl, bool include_header, bool include_index_col = true);

template <typename... ArgsT>
void MORPHEUS_EXPORT write_df_to_file(const TableInfo& tbl,
                                      const std::string& filename,
                                      FileTypes file_type = FileTypes::Auto,
                                      ArgsT&&... args)
{
    if (file_type == FileTypes::Auto)
    {
        file_type = determine_file_type(filename);  // throws if it is unable to determine the type
    }

    std::ofstream out_file;
    out_file.open(filename);

    switch (file_type)
    {
    case FileTypes::JSON: {
        return df_to_json(tbl, out_file, std::forward<ArgsT>(args)...);
        break;
    }
    case FileTypes::CSV: {
        return df_to_csv(tbl, out_file, std::forward<ArgsT>(args)...);
        break;
    }
    case FileTypes::PARQUET: {
        return df_to_parquet(tbl, out_file, std::forward<ArgsT>(args)...);
        break;
    }
    case FileTypes::Auto:
    default:
        throw std::logic_error(MORPHEUS_CONCAT_STR("Unsupported filetype: " << file_type));
    }
}

template <typename... ArgsT>
void MORPHEUS_EXPORT write_df_to_file(const MutableTableInfo& tbl,
                                      const std::string& filename,
                                      FileTypes file_type = FileTypes::Auto,
                                      ArgsT&&... args)
{
    if (file_type == FileTypes::Auto)
    {
        file_type = determine_file_type(filename);  // throws if it is unable to determine the type
    }

    std::ofstream out_file;
    out_file.open(filename);

    switch (file_type)
    {
    case FileTypes::JSON: {
        return df_to_json(tbl, out_file, std::forward<ArgsT>(args)...);
        break;
    }
    case FileTypes::CSV: {
        return df_to_csv(tbl, out_file, std::forward<ArgsT>(args)...);
        break;
    }
    case FileTypes::PARQUET: {
        return df_to_parquet(tbl, out_file, std::forward<ArgsT>(args)...);
        break;
    }
    case FileTypes::Auto:
    default:
        throw std::logic_error(MORPHEUS_CONCAT_STR("Unsupported filetype: " << file_type));
    }
}

struct MORPHEUS_EXPORT SerializersProxy
{
    static void write_df_to_file(pybind11::object df,
                                 std::string filename,
                                 FileTypes file_type,
                                 const pybind11::kwargs& kwargs);
};  // end of group
}  // namespace morpheus