ISmearer.h

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// ISmearer Class
// 
// Namespace Atlfast::
//
//--------------------------------------------------------
//
// This pure Abstract Base Class defines the interface
// for Atlfast smearer objects.
//
// A smearer object provides a single public service,
// returning a smeared four-vector given an input four-vector,
// so this interface is particularly simple for the moment.
// (So simple that it might even prove unnecessary in the end!)
//
//
// Note in passing that we hope that smearers can be
// made into Gaudi "Tools" or whatever the Athena
// equivalent turns out to be. So this interface is rather
// provisional and will probably be extended at that time
// This will allow reading of parameters via jobOptions etc.
//
//
//
// Authors: H.T.Phillips, P. Clarke, E. Richter-Was, P. Sherwood, R. Steward
//
//

#ifndef ATLFAST_ISMEARER_H
#define ATLFAST_ISMEARER_H

//cct: needed this so as to use stl vectors
#include <vector>

#include "CLHEP/Vector/LorentzVector.h"
#include "HepMC/GenParticle.h"

namespace Atlfast {

  class ISmearer {
  public:

    virtual HepLorentzVector smear( const HepMC::GenParticle& ) = 0;
    virtual HepLorentzVector smear( const HepLorentzVector& ) = 0;
    
    virtual int setSmearParameters( const std::vector<double>& )= 0;
    virtual int setSmearParamSchema( const int ) =0;

    virtual ~ISmearer(){}

  };


} // end of namespace bracket

#endif

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