string_factor.hpp

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#ifndef TAKANE_STRING_FACTOR_HPP
#define TAKANE_STRING_FACTOR_HPP
 
#include <string>
#include <stdexcept>
#include <filesystem>
 
#include "ritsuko/hdf5/hdf5.hpp"
 
#include "utils_public.hpp"
#include "utils_string.hpp"
#include "utils_factor.hpp"
 
namespace takane {
 
namespace string_factor {
 
inline void validate(const std::filesystem::path& path, const ObjectMetadata& metadata, Options& options) {
    const std::string type_name = "string_factor"; // use a separate variable to avoid dangling reference warnings from GCC.
    const auto& vstring = internal_json::extract_version_for_type(metadata.other, type_name);
    auto version = ritsuko::parse_version_string(vstring.c_str(), vstring.size(), /* skip_patch = */ true);
    if (version.major != 1) {
        throw std::runtime_error("unsupported version string '" + vstring + "'");
    }
 
    auto handle = ritsuko::hdf5::open_file(path / "contents.h5");
    auto ghandle = ritsuko::hdf5::open_group(handle, type_name.c_str());
    internal_factor::check_ordered_attribute(ghandle);
 
    size_t num_levels = internal_factor::validate_factor_levels(ghandle, "levels", options.hdf5_buffer_size);
    size_t num_codes = internal_factor::validate_factor_codes(ghandle, "codes", num_levels, options.hdf5_buffer_size);
 
    internal_string::validate_names(ghandle, "names", num_codes, options.hdf5_buffer_size);
}
 
inline size_t height(const std::filesystem::path& path, [[maybe_unused]] const ObjectMetadata& metadata, [[maybe_unused]] Options& options) {
    auto handle = ritsuko::hdf5::open_file(path / "contents.h5");
    auto ghandle = handle.openGroup("string_factor");
    auto dhandle = ghandle.openDataSet("codes");
    return ritsuko::hdf5::get_1d_length(dhandle.getSpace(), false);
}
 
}
 
}
 
#endif