data_exporter.hpp

#ifndef __CORE_DATA_EXPORTER_HPP__
#define __CORE_DATA_EXPORTER_HPP__
 
#include "common/logger.hpp"
#include <common/common.hpp>
#include <common/execinfo.hpp>
#include <core/simulation_parameters.hpp>
#include <cstddef>
#include <cstdint>
#include <memory>
#include <optional>
#include <span>
#include <string>
#include <string_view>
#include <unordered_map>
#include <variant>
#include <vector>
namespace Core
{
 
  // static inline std::string get_filename(std::string_view filename,
  // std::size_t current_rank)
  // {
  //   return std::string(filename) + "_partial_" + std::to_string(current_rank)
  //   + ".h5";
  // }
  bool check_results_file_name(Core::UserControlParameters& params);
  class DataExporter
  {
  public:
    DataExporter(const DataExporter&) = delete;
    DataExporter(DataExporter&&) = delete;
    DataExporter& operator=(const DataExporter&) = delete;
    DataExporter& operator=(DataExporter&&) = delete;
    DataExporter() = default;
    void do_link(std::string_view filename,
                 std::string_view link_name,
                 std::string_view groupname);
 
    void set_logger(std::shared_ptr<IO::Logger> _logger)
    {
      logger = std::move(_logger);
    }
 
  protected:
    std::shared_ptr<IO::Logger> logger;

    struct MultiMatrixDescription
    {
      std::string name;             
      std::vector<size_t> dims;     
      std::vector<size_t> max_dims; 
      std::optional<std::vector<unsigned long long>>
          chunk_dims;   
      bool compression; 
      bool is_integer;  
    };
 
    // Using type definitions with aligned comments
    using export_metadata_t =
        std::variant<uint64_t, int, std::string>; 
    using export_metadata_kv =
        std::unordered_map<std::string,
                           export_metadata_t>; 
    using ViewParticleProperties =
        Kokkos::View<double**,
                     Kokkos::LayoutRight,
                     HostSpace>; 
    using simple_export_t = std::variant<size_t,
                                         std::string,
                                         std::vector<size_t>,
                                         double,
                                         uint32_t>; 
    using export_initial_kv =
        std::unordered_map<std::string,
                           simple_export_t>; 
 
    using matrix_variant_t =
        std::variant<std::span<const double>,
                     std::span<const std::size_t>,
                     double>; 
 
    // Methods
 
    explicit DataExporter(
        const ExecInfo& info,
        std::string_view _filename,
        std::optional<export_metadata_t> user_description = std::nullopt);
    ~DataExporter();
 
    void write_matrix(std::string_view name,
                      std::span<const double> values,
                      bool compress = false);
 
    void write_matrix(std::string_view name,
                      std::span<const double> values,
                      size_t n_row,
                      size_t n_col,
                      bool compress = false);
 
    void prepare_matrix(MultiMatrixDescription description);
 
    void append_matrix(std::string_view name, matrix_variant_t data);
 
    void append_array(std::string_view name,
                      std::span<const double> data,
                      uint64_t last_size = 0);
 
    void write_properties(std::optional<std::string> specific_dataspace,
                          const export_metadata_kv& values);
 
    void write_simple(const export_initial_kv& values, std::string_view root);
 
    void write_simple(std::string specific_dataspace,
                      const simple_export_t& values);
 
    export_metadata_kv metadata;
    uint64_t export_counter = 0;
 
  private:
    std::unordered_map<std::string, MultiMatrixDescription> descriptors;
    class impl;
    std::unique_ptr<impl> pimpl;
  };
 
} // namespace Core
#endif