meta.h

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/* Copyright (c) 2021, 2024, 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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#ifndef META_INCLUDED
#define META_INCLUDED
 
#include <string>
 
namespace keyring_common {
namespace meta {
 
/**
  Common metadata.
  Usually provided by:
  - consumer of keyring APIs
  - Keyring backend when data is fetched
*/
 
class Metadata final {
 public:
  Metadata(const std::string key_id, const std::string owner_id);
  Metadata(const char *key_id, const char *owner_id);
  Metadata();
 
  Metadata(const Metadata &src);
 
  Metadata(Metadata &&src) noexcept;
 
  Metadata &operator=(const Metadata &src);
 
  Metadata &operator=(Metadata &&src) noexcept;
 
  /** Destructor */
  ~Metadata();
 
  /** Get key ID */
  const std::string key_id() const;
 
  /** Get owner info */
  const std::string owner_id() const;
 
  /** Validity of metadata object */
  bool valid() const;
 
  /* For unordered map */
 
  const std::string hash_key() const { return hash_key_; }
  bool operator==(const Metadata &other) const {
    return key_id_ == other.key_id_ && owner_id_ == other.owner_id_;
  }
  struct Hash {
    size_t operator()(const Metadata &metadata) const {
      return std::hash<std::string>()(metadata.hash_key());
    }
  };
 
 private:
  void create_hash_key();
 
  /** Consumer specific key id*/
  std::string key_id_;
  /** Owner information */
  std::string owner_id_;
  /** Hash key */
  std::string hash_key_;
  /** Validity of metadata */
  bool valid_{false};
};
 
}  // namespace meta
}  // namespace keyring_common
 
#endif  // !META_INCLUDED