#ifndef _TOWER_SUMMER_HH_
#define _TOWER_SUMMER_HH_

#ifdef USE_CDFEDM2
//////////////////////////////////////////////////////////////////////////
//
// Component: TowerSummer.hh
// Purpose: This is a base class for classes that calculate how 
//          physics tower quantities are summed 
//          
// Created: 20/09/99  Pierre Savard (based on Jodi Lamoureux's class)
// History: 
//
//////////////////////////////////////////////////////////////////////////

#include <iosfwd>
#include <iostream>
#include <cstddef>
#include "CalorGeometry/CalConstants.hh"
#include "CalorGeometry/TowerKey.hh"
#include "CalorGeometry/Centroid.hh"
#include "CalorObjects/PhysicsTowerView.hh"



#ifndef __CINT__
#include "CLHEP/Vector/LorentzVector.h"
#else
  class HepLorentzVector;
#endif

// namespace calor {
  
  class TowerSummer {
  public:
    
    //
    // Memory management
    //
        
    // Default constructor

     TowerSummer(){}
    
    // Default copy constructor and assignment operator do the right thing.
    
    // Destructor
    
        virtual ~TowerSummer(){}
    
    //
    // Testing
    //
    
    //
    // Manipulation and access
    //

    // Access methods 

    virtual std::string summerName() const =0;

    virtual Centroid sumTowers(const PhysicsTowerView& towerView) const = 0;
    virtual HepLorentzVector sumFourVector(const PhysicsTowerView& towerView) const = 0;  
    virtual float dRsquared(const PhysicsTower* tower, float eta, float phi) = 0;


    //
    // Printing
    //

    //     void print(std::ostream& os) const;
    
  private:

    //    string      _summerName; 	           
  };

 
  
  // } // namespace calor

#endif  // USE_CDFEDM2
#endif // _TOWER_SUMMER_HH_