#ifndef _INPUTSOURCE_HH_
#define _INPUTSOURCE_HH_

#ifdef USE_CDFEDM2
//////////////////////////////////////////////////////////////////////////
//
// Component: InputSource.hh
// Purpose: This is the base class that knows which data to use to
//          build PhysicsTowers (e.g. CalData or HEPG - as of 30/06/99
//          only CalData is implemented)
//          
// Created: 18/06/99  Pierre Savard
// History: 
//
//////////////////////////////////////////////////////////////////////////

#include <iosfwd>
#include <iostream>
#include <cstddef>
#include "AbsEnv/AbsEnv.hh"
#include "Edm/Id.hh"
#include "CalorGeometry/CalConstants.hh"
#include "CalorObjects/EnergyData.hh"


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

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

    virtual Id initEvent(AbsEvent* anEvent) = 0;
    virtual Id initEvent(AbsEvent* anEvent, Id objectId) = 0;

    // Access methods 

    virtual EnergyData* next()= 0;
    virtual bool done() const = 0;
    virtual std::string sourceName() const = 0;

    //
    // Printing
    //
    
    void print() const;
    
  protected:

  };

  
  // } // namespace calor

#endif  // USE_CDFEDM2
#endif // _INPUTSOURCE_HH_