#ifndef _OWLPS_POSITIONING_INPUTMEDIUM_HH_
#define _OWLPS_POSITIONING_INPUTMEDIUM_HH_

#include "request.hh"

class InputMedium
{
protected:
  Request current_request ;
  unsigned long current_line ;

public:
  InputMedium() ;

  const Request& get_current_request(void) const ;
  unsigned int get_current_line(void) const ;

  /*
   * Reads the next request and returns it, increments current_line
   * Returns an empty Request in case of error or EOF (note that
   * when casted in bool, an empty Request is false).
   */
  virtual const Request& get_next_request(void) = 0 ;

  /*
   * Returns true if the last request has been reached
   */
  virtual bool eof(void) const = 0 ;
} ;



/*** Constructeurs ***/


inline InputMedium::InputMedium()
{
  current_line = 0 ;
}



/*** Accesseurs lecture ***/


inline const Request& InputMedium::get_current_request() const
{
  return current_request ;
}


inline unsigned int InputMedium::get_current_line() const
{
  return current_line ;
}



#endif // _OWLPS_POSITIONING_INPUTMEDIUM_HH_