CollectionIDTable.h

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#ifndef PODIO_COLLECTIONIDTABLE_H
#define PODIO_COLLECTIONIDTABLE_H
 
#include <memory>
#include <mutex>
#include <string>
#include <vector>
 
namespace podio {
 
class CollectionIDTable {
 
public:
  CollectionIDTable();
  ~CollectionIDTable() = default;
 
  CollectionIDTable(const CollectionIDTable&) = delete;
  CollectionIDTable& operator=(const CollectionIDTable&) = delete;
  CollectionIDTable(CollectionIDTable&&) = default;
  CollectionIDTable& operator=(CollectionIDTable&&) = default;
 
  /// constructor from existing ID:name mapping
  CollectionIDTable(std::vector<int>&& ids, std::vector<std::string>&& names);
 
  CollectionIDTable(const std::vector<int>& ids, const std::vector<std::string>& names);
 
  /// return collection ID for given name
  int collectionID(const std::string& name) const;
 
  /// return name for given collection ID
  const std::string name(int collectionID) const;
 
  /// Check if collection name is known
  bool present(const std::string& name) const;
 
  /// return registered names
  const std::vector<std::string>& names() const {
    return m_names;
  };
 
  /// return the ids
  const std::vector<int>& ids() const {
    return m_collectionIDs;
  }
 
  /// register new name to the table
  /// returns assigned collection ID
  int add(const std::string& name);
 
  /// Prints collection information
  void print() const;
 
  /// Does this table hold any information?
  bool empty() const {
    return m_names.empty();
  }
 
private:
  std::vector<int> m_collectionIDs{};
  std::vector<std::string> m_names{};
  mutable std::unique_ptr<std::mutex> m_mutex{nullptr};
};
 
} // namespace podio
#endif