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geant4/source/run/include/G4VPersistencyManager.hh
2023-06-30 09:09:57 +02:00

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//
// ********************************************************************
// * License and Disclaimer *
// * *
// * The Geant4 software is copyright of the Copyright Holders of *
// * the Geant4 Collaboration. It is provided under the terms and *
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// * This code implementation is the result of the scientific and *
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// ********************************************************************
//
// G4VPersistencyManager
//
// Class description:
//
// This is an abstract base class for persistency management. The user's
// concrete class derived from this class must act as a singleton. The user
// must construct the object of his/her concrete persistency manager in
// the main().
// The virtual methods of Store() and Retrieve() will be invoked from
// G4RunManager if the persistency manager exists.
// Even if the user does not use any ODBMS system, the user can use this
// class especially for Store() methods. Writing an ASCII file for storing
// event information can be delegated to this class, for example.
// Author: Youhei Morita, 2001
// --------------------------------------------------------------------
#ifndef G4VPersistencyManager_hh
#define G4VPersistencyManager_hh 1
#include "globals.hh"
class G4Event;
class G4Run;
class G4VPhysicalVolume;
class G4VPersistencyManager
{
public:
// Static method to return the pointer to the singleton object.
// Note that this method does NOT create the singleton itself.
static G4VPersistencyManager* GetPersistencyManager();
virtual ~G4VPersistencyManager();
// Stores G4Event, G4Run, and geometry tree characterised
// by the world volume.
virtual G4bool Store(const G4Event* anEvent) = 0;
virtual G4bool Store(const G4Run* aRun) = 0;
virtual G4bool Store(const G4VPhysicalVolume* world) = 0;
// Restores G4Event, G4Run, and geometry tree characterised
// by the world volume.
virtual G4bool Retrieve(G4Event*& anEvent) = 0;
virtual G4bool Retrieve(G4Run*& aRun) = 0;
virtual G4bool Retrieve(G4VPhysicalVolume*& theWorld) = 0;
protected:
G4VPersistencyManager();
private:
static G4ThreadLocal G4VPersistencyManager* fPersistencyManager;
};
#endif