core/include/ISCycleBaseNTuple.h

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// Dear emacs, this is -*- c++ -*-
// $Id: ISCycleBaseNTuple.h 283 2011-11-14 18:22:40Z krasznaa $
/***************************************************************************
 * @Project: SFrame - ROOT-based analysis framework for ATLAS
 * @Package: Core
 *
 * @author Stefan Ask       <Stefan.Ask@cern.ch>           - Manchester
 * @author David Berge      <David.Berge@cern.ch>          - CERN
 * @author Johannes Haller  <Johannes.Haller@cern.ch>      - Hamburg
 * @author A. Krasznahorkay <Attila.Krasznahorkay@cern.ch> - CERN/Debrecen
 *
 ***************************************************************************/

#ifndef SFRAME_CORE_ISCycleBaseNTuple_H
#define SFRAME_CORE_ISCycleBaseNTuple_H

// STL include(s):
#include <vector>

// ROOT include(s):
#include <Rtypes.h>

// Local include(s):
#include "SError.h"

// Forward declaration(s):
class TTree;
class TList;
class TFile;
class SInputData;

class ISCycleBaseNTuple {

public:
   virtual ~ISCycleBaseNTuple() {}

   virtual void SetNTupleOutput( TList* output ) = 0;
   virtual TList* GetNTupleOutput() const = 0;

protected:
   virtual void CreateOutputTrees( const SInputData& id,
                                   std::vector< TTree* >& outTrees,
                                   TFile* outputFile = 0 ) throw( SError ) = 0;
   virtual void SaveOutputTrees( TDirectory* output ) throw( SError ) = 0;
   virtual void LoadInputTrees( const SInputData& id, TTree* main_tree,
                                TFile*& inputFile ) throw( SError ) = 0;
   virtual void GetEvent( Long64_t entry ) throw( SError ) = 0;
   virtual Double_t CalculateWeight( const SInputData& inputData, Long64_t entry ) = 0;
   virtual void ClearCachedTrees() = 0;

}; // class ISCycleBaseNTuple

#endif // SFRAME_CORE_ISCycleBaseNTuple_H