#ifndef ALIANASCALE_H
#define ALIANASCALE_H
/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 * See cxx source for full Copyright notice     */

//______________________________________________________________________________
// An post event loop analysis task that scales the input histograms 
//
//*-- Yves Schutz 
//////////////////////////////////////////////////////////////////////////////

#include "AliAnalysisTask.h"  
class TH1F ; 

class AliAnaScale : public AliAnalysisTask {

public:
  AliAnaScale() ;
  AliAnaScale(const char *name) ;
  virtual ~AliAnaScale() { ; }
   
  virtual void ConnectInputData(Option_t * = "");
  
  virtual void CreateOutputObjects(); 
  
  virtual void Init() ; 	
  
  virtual void LocalInit()                { Init()         ; }
  
  virtual void Exec(Option_t * opt = "") ;
  
  void         Set(Double_t val)          { fScale = val   ; }
  
  void         SetDebugLevel(Int_t level) { fDebug = level ; }

  void         MakeSumw2(Bool_t sum)      { fSumw2 = sum   ; }

private:
  
  AliAnaScale(           const AliAnaScale&); // Not implemented
  AliAnaScale& operator=(const AliAnaScale&); // Not implemented

  // input and output
  Int_t     fDebug ;  // Debug flag
  // task parameters
  Float_t   fScale ;  // Scaling factor 

  // Histograms
  TList   * fInputList ;  //! input data list
  TList   * fOutputList ; //! output data list
  Bool_t    fSumw2;       //  compute sum of squares of weights for bin content error calculation
  TH1F *    fhCount;      //! counter histogram for file merging

  ClassDef(AliAnaScale, 2); // a post event loop scaling 
};

#endif // ALIANASCALE_H