column_datatype_converter.h

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/*
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  it under the terms of the GNU General Public License, version 2.0,
  as published by the Free Software Foundation.
 
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  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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  You should have received a copy of the GNU General Public License
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  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/
 
#ifndef ROUTER_SRC_MYSQL_REST_SERVICE_SRC_MRS_DATABASE_CONVERTERS_COLUMN_DATATYPE_CONVERTER_H_
#define ROUTER_SRC_MYSQL_REST_SERVICE_SRC_MRS_DATABASE_CONVERTERS_COLUMN_DATATYPE_CONVERTER_H_
 
#include <map>
#include <string>
 
#include "mrs/database/entry/object.h"
#include "mysql/harness/string_utils.h"
 
namespace mrs {
namespace database {
 
class ColumnDatatypeConverter {
 public:
  ColumnDatatypeConverter() {}
 
  const std::map<std::string, entry::ColumnType> &get_map() const {
    const static std::map<std::string, entry::ColumnType> k_datatype_map{
        {"TINYINT", entry::ColumnType::INTEGER},
        {"SMALLINT", entry::ColumnType::INTEGER},
        {"MEDIUMINT", entry::ColumnType::INTEGER},
        {"INT", entry::ColumnType::INTEGER},
        {"BIGINT", entry::ColumnType::INTEGER},
        {"FLOAT", entry::ColumnType::DOUBLE},
        {"REAL", entry::ColumnType::DOUBLE},
        {"DOUBLE", entry::ColumnType::DOUBLE},
        {"DECIMAL", entry::ColumnType::DOUBLE},
        {"CHAR", entry::ColumnType::STRING},
        {"NCHAR", entry::ColumnType::STRING},
        {"VARCHAR", entry::ColumnType::STRING},
        {"NVARCHAR", entry::ColumnType::STRING},
        {"BINARY", entry::ColumnType::BINARY},
        {"VARBINARY", entry::ColumnType::BINARY},
        {"TINYTEXT", entry::ColumnType::STRING},
        {"TEXT", entry::ColumnType::STRING},
        {"MEDIUMTEXT", entry::ColumnType::STRING},
        {"LONGTEXT", entry::ColumnType::STRING},
        {"TINYBLOB", entry::ColumnType::BINARY},
        {"BLOB", entry::ColumnType::BINARY},
        {"MEDIUMBLOB", entry::ColumnType::BINARY},
        {"LONGBLOB", entry::ColumnType::BINARY},
        {"JSON", entry::ColumnType::JSON},
        {"DATETIME", entry::ColumnType::STRING},
        {"DATE", entry::ColumnType::STRING},
        {"TIME", entry::ColumnType::STRING},
        {"YEAR", entry::ColumnType::INTEGER},
        {"TIMESTAMP", entry::ColumnType::STRING},
        {"GEOMETRY", entry::ColumnType::GEOMETRY},
        {"POINT", entry::ColumnType::GEOMETRY},
        {"LINESTRING", entry::ColumnType::GEOMETRY},
        {"POLYGON", entry::ColumnType::GEOMETRY},
        {"GEOMCOLLECTION", entry::ColumnType::GEOMETRY},
        {"GEOMETRYCOLLECTION", entry::ColumnType::GEOMETRY},
        {"MULTIPOINT", entry::ColumnType::GEOMETRY},
        {"MULTILINESTRING", entry::ColumnType::GEOMETRY},
        {"MULTIPOLYGON", entry::ColumnType::GEOMETRY},
        {"BIT", entry::ColumnType::BINARY},
        {"BOOLEAN", entry::ColumnType::BOOLEAN},
        {"ENUM", entry::ColumnType::STRING},
        {"SET", entry::ColumnType::STRING},
        {"VECTOR", entry::ColumnType::VECTOR}};
 
    return k_datatype_map;
  }
 
  void operator()(entry::ColumnType *out, const std::string &datatype) const {
    const auto &k_datatype_map = get_map();
    auto spc = datatype.find(' ');
    auto p = datatype.find('(');
 
    p = std::min(spc, p);
    if (p != std::string::npos) {
      if (auto it = k_datatype_map.find(
              mysql_harness::make_upper(datatype.substr(0, p)));
          it != k_datatype_map.end()) {
        if (it->second == entry::ColumnType::BINARY) {
          if (mysql_harness::make_upper(datatype) == "BIT(1)") {
            *out = entry::ColumnType::BOOLEAN;
            return;
          }
        }
        *out = it->second;
        return;
      }
    } else {
      if (auto it = k_datatype_map.find(mysql_harness::make_upper(datatype));
          it != k_datatype_map.end()) {
        *out = it->second;
        return;
      }
    }
    throw std::runtime_error("Unknown datatype " + datatype);
  }
};
 
}  // namespace database
}  // namespace mrs
 
#endif /* ROUTER_SRC_MYSQL_REST_SERVICE_SRC_MRS_DATABASE_CONVERTERS_COLUMN_DATATYPE_CONVERTER_H_ \
        */