#ifndef ABSBEAM_HH
#define ABSBEAM_HH (1)

//
// This is the abstract interface for CotBeam and SvxBeam, the
// primary user interface for retrieving the beamline from
// the database.  The meaning of the methods is explained more in 
// those headers.
//
//   12/2001 - creation, Ray Culbertson
//

#include <string>
#include "VertexObjects/Beamline.hh"

class HepPoint3D;
class HepVector;
class Hep3Vector;
class HepSymMatrix;

class AbsBeam {

public:

  virtual int loadRun() =0;

  virtual bool isValid() =0;

  virtual HepPoint3D position(double z) =0;

  virtual HepVector  positionVector(double z) =0;

  virtual Hep3Vector slope() =0;

  virtual HepSymMatrix cov3(double z) =0;

  virtual void printSummary() =0;

  virtual void printAll() =0;

  virtual Beamline getBeamline(int eventFlag = -1) { return Beamline(); }

  virtual int writeToOutput() { return 1;}

  virtual void setReadFromFile(bool x) {}

  virtual void setDbFallback(bool b) {}

  virtual void setUseTimeDep(bool b) {}

  virtual void setStatus(std::string status) =0;

  virtual void setHistoryCode(int history) =0;

  virtual void setAlgorithm(int algorithm) =0;

  virtual void setSource(int source) =0;

  virtual void printLevel(int level) =0;

  virtual int loadRun(int run, int version = -1) =0;

  virtual int loadCid(int cid) = 0;

  virtual std::string getStatus() =0;

  virtual int    getVersion() =0;

  virtual int    getCid() = 0;
};

#endif