data_extension.h

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/* Copyright (c) 2021, 2025, Oracle and/or its affiliates.
 
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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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   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
#ifndef Data_extension_INCLUDED
#define Data_extension_INCLUDED
 
#include "data.h" /* data::Data */
 
namespace keyring_common {
 
namespace data {
/**
  Data wrapper to include backend specific extensions
*/
 
template <typename Extension>
class Data_extension final : public Data {
 public:
  /** Constructor */
  Data_extension(const data::Data data, const Extension ext)
      : data::Data(data), ext_(ext) {}
  Data_extension() : Data_extension(data::Data{}, Extension{}) {}
  Data_extension(const data::Data data) : Data_extension(data, Extension{}) {}
  Data_extension(const Extension ext) : Data_extension(data::Data{}, ext) {}
 
  /** Copy constructor */
  Data_extension(const Data_extension &src)
      : Data_extension(src.get_data(), src.ext_) {}
 
  /** Assignment operator */
  Data_extension &operator=(const Data_extension &src) {
    Data::operator=(src);
    ext_ = src.ext_;
 
    return *this;
  }
 
  /* Get data */
  const data::Data get_data() const override { return Data::get_data(); }
 
  /* Get Metadata extension details */
  const Extension get_extension() const { return ext_; }
 
  /* Set data */
  void set_data(const data::Data &data) override { Data::operator=(data); }
  /* Set metadata extension */
  void set_extension(const Extension ext) { ext_ = ext; }
 
 private:
  /** Backend specific extensions */
  Extension ext_;
};
 
}  // namespace data
 
}  // namespace keyring_common
 
#endif  // !Data_extension_INCLUDED