#ifndef __IAlertsDaily_h_
#define __IAlertsDaily_h_

#include "DataFormat.h"

class IAlertsDaily
{
private:
  static IAlertsDaily const *_implementation;

public:
  virtual ~IAlertsDaily() { }

  // If there is a problem, this will return Record::EMPTY.  This will
  // never return NULL.
  virtual Record::Ref find(char const *symbol, time_t time) const;

  // Find or set the implementation.  The default implementation will return
  // EMPTY for every query.  An implementation should be thread safe.
  static IAlertsDaily const *get() { return _implementation; }
  static void set(IAlertsDaily const *implementation) 
  { _implementation = implementation; }
};

#endif