/cvmfs/atlas.cern.ch/repo/sw/ASG/AnalysisBase/2.4.31/PMGTools/PMGTools/PMGSherpa22VJetsWeightTool.h

// Dear emacs, this is -*- c++ -*-
// $Id: PMGSherpa22VJetsWeightTool.h 764400 2016-07-26 17:47:39Z tripiana $
#ifndef PMGTOOLS_PMGSHERPA22VJETSWEIGHTTOOL_H
#define PMGTOOLS_PMGSHERPA22VJETSWEIGHTTOOL_H

// System include(s):
#include <array>

// Infrastructure include(s):
#include "AsgTools/AsgTool.h"

// Interface include(s):
#include "PATInterfaces/IWeightTool.h"


namespace PMGTools {

  class PMGSherpa22VJetsWeightTool : public virtual IWeightTool,
                     public asg::AsgTool { 
    
  public:
    //constructor for athena can be created using special macro
    ASG_TOOL_CLASS( PMGSherpa22VJetsWeightTool, IWeightTool )
    
    
    PMGSherpa22VJetsWeightTool( const std::string& name =
                "PMGSherpa22VJetsWeightTool" );
    
    
    virtual StatusCode  initialize() override final;
    
    
    
    virtual double getWeight() const override;
    
    
    
    double getSherpa22VJets_NJetCorrection( size_t ntag ) const;
    double
    getSherpa22VJets_NJetCorrection( const std::string &jetcontainer ) const;
    size_t getSherpa22VJets_NJet( const std::string &jetcontainer ) const;
    
    
  private:
    static const size_t NJET_CORRECTION_BINS = 9;
    std::array< double, NJET_CORRECTION_BINS > m_corrFactors;
    
    
    std::string m_truthJetContainer;
    std::string m_truthParticleContainer;
    
    
  }; // class PMGSherpa22VJetsWeightTool
  
} //namespace PMGTools

#endif //> !PMGTOOLS_PMGSHERPA22VJETSWEIGHTTOOL_H

---