PdbApplication.h

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#ifndef PDBCAL_BASE_PDBAPPLICATION_H
#define PDBCAL_BASE_PDBAPPLICATION_H

#include "Pdb.h"

#include <memory>  // for unique_ptr
#include <string>

class PdbCalBank;

class PdbApplication
{

protected:
  PdbApplication() {}

public:
  static PdbApplication *instance();
  virtual ~PdbApplication() {}


  virtual PdbStatus startUpdate() = 0;
  virtual PdbStatus startRead() = 0;
  virtual PdbStatus commit() = 0;
  virtual PdbStatus abort() = 0;
  virtual PdbStatus isActive() = 0;
  virtual PdbStatus commit(PdbCalBank *) = 0;
  virtual PdbStatus commit(PdbCalBank *,int,long,long,long) = 0;
  //
  // Should return the file (database) size in bytes.
  //

  virtual int setDBName(const std::string &name) = 0;
  virtual int DisconnectDB() = 0;

protected:
  // Wrap the singleton object in an unique_ptr so it gets cleaned up.
  // Even though unique_ptr is often a horrible choice, here it should be ok
  // since __instance will never be copied. If this wouldn't be visible for
  // CINT a good choice would have been boost::scoped_ptr, or in C++11
  // std::unique_ptr.
  friend class std::unique_ptr<PdbApplication>;
  static std::unique_ptr<PdbApplication> __instance;
};

#endif /* PDBCAL_BASE_PDBAPPLICATION_H */