T_AthenaPoolExtendingCnv.h

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/*
  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef ATHENAPOOLCNVSVC_T_ATHENAPOOLEXTENDCNV_H
#define ATHENAPOOLCNVSVC_T_ATHENAPOOLEXTENDCNV_H

 
#include "T_AthenaPoolCustomCnv.h"
//#include "TPTools/AthenaConverterTLPExtension.h"
#include "AthenaPoolCnvTPExtension.h"

 
template <class TRANS, class PERS>
class T_AthenaPoolExtendingCnv
   : public T_AthenaPoolCustomCnv<TRANS, PERS>,
     public AthenaPoolCnvTPExtension
{
friend class CnvFactory<T_AthenaPoolExtendingCnv<TRANS, PERS> >;
 
public:
   typedef T_AthenaPoolCustomCnv<TRANS, PERS>   BaseType;
 
public:
  // -------------------------------------------------------------
  T_AthenaPoolExtendingCnv(ISvcLocator* svcloc);
 
protected:
  // Methods to be implemented in the derived converter class
  // ##########################################################
  
  virtual TopLevelTPCnvBase*   getTopLevelTPCnv() override = 0;
  
  virtual void      readObjectFromPool( const std::string& token ) = 0 ; 
  
protected:
  // redirect to the old API readObjectFromPool()
  virtual void      readObject( const std::string& token ) override { this->readObjectFromPool(token); }
  
  virtual std::unique_ptr<const Token> writeObject(const std::string& key, const std::string& output) override;

  virtual BaseType* baseAthenaPoolCnv() { return m_originalExtendingCnv; }

  virtual void      wasClonedFrom( AthenaConverterTLPExtension *orig_converter ) override;

  virtual bool      needsCloning() const override { return m_originalExtendingCnv != 0; }

  virtual void      setToken(const std::string& token)override;

  template <class P>
  P*   poolReadObject();
  
  template <class P>
  void  poolReadObject( TopLevelTPCnvBase& tlp_converter );
 
   
protected:
   //-------------------------------------------------------------------
   // Internal methods
  
  virtual const std::string   name() const override;
 
  
  // hidden away, as they don't make sense for this converter
  virtual PERS  *createPersistent( TRANS *) override { return 0; }
  virtual TRANS *createTransient() override { return 0; }

  BaseType* m_originalExtendingCnv;
};
 
 
#include "AthenaPoolCnvSvc/T_AthenaPoolExtendingCnv.icc"
 
 
#endif