json_array.hpp

Go to the documentation of this file.

// Copyright 2024 Man Group Operations Limited
//
// 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 <optional>
#include <string_view>
#include <vector>
 
#include "sparrow/arrow_interface/arrow_array_schema_proxy.hpp"
#include "sparrow/c_interface.hpp"
#include "sparrow/utils/extension.hpp"
#include "sparrow/variable_size_binary_array.hpp"
#include "sparrow/variable_size_binary_view_array.hpp"
 
namespace sparrow
{
 
    using json_extension = simple_extension<"arrow.json">;
    using json_array = variable_size_binary_array_impl<
        arrow_traits<std::string>::value_type,
        arrow_traits<std::string>::const_reference,
        std::int32_t,
        json_extension>;

    using big_json_array = variable_size_binary_array_impl<
        arrow_traits<std::string>::value_type,
        arrow_traits<std::string>::const_reference,
        std::int64_t,
        json_extension>;

    using json_view_array = variable_size_binary_view_array_impl<
        arrow_traits<std::string>::value_type,
        arrow_traits<std::string>::const_reference,
        json_extension>;
 
    namespace detail
    {
        template <>
        struct get_data_type_from_array<sparrow::json_array>
        {
            [[nodiscard]] static constexpr sparrow::data_type get()
            {
                return sparrow::data_type::STRING;
            }
        };
 
        template <>
        struct get_data_type_from_array<sparrow::big_json_array>
        {
            [[nodiscard]] static constexpr sparrow::data_type get()
            {
                return sparrow::data_type::LARGE_STRING;
            }
        };
 
        template <>
        struct get_data_type_from_array<sparrow::json_view_array>
        {
            [[nodiscard]] static constexpr sparrow::data_type get()
            {
                return sparrow::data_type::STRING_VIEW;
            }
        };
    }
}