// -*- mode: c++ -*-
#ifndef BRAT_BrGeometryDbManager
#define BRAT_BrGeometryDbManager
//
// $Id: BrGeometryDbManager.h,v 1.5 2002/04/16 14:44:12 hagel Exp $
//
// Root Classes
#ifndef ROOT_TObject
#include "TObject.h"
#endif

#ifndef ROOT_TObjArray
#include "TObjArray.h"
#endif


// BRAHMS Classes

#ifndef BRAT_BrDetectorVolume
#include "BrDetectorVolume.h"
#endif

class BrGeometryDbManager;
class BrParameterDbManager;


class BrDbObject : public TObject {
  //
  // This class is used only by the manager class.
  // The objects are used to maintain what databases objects has been
  // loaded via this mechanism.
  //
public:
  BrDbObject(){};
  BrDbObject(const Char_t* classname, const Char_t* detectorname, TObject* obj);
  ~BrDbObject();
 private:

  Char_t   fClassName[80];        // ClassName for database object
  Char_t   fDetectorName[80];     // Identifier of detector/magnet name
  TObject* fDetectorGeometry;     // Pointer to database object.

public:
  friend class BrGeometryDbManager;
  friend class BrParameterDbManager;
  friend ostream& operator << (ostream& os, BrDbObject* dbobj);

  ClassDef(BrDbObject,0) // BRAHMS Database  object
};

class BrGeometriesDb;
class BrRunInfoManager;
class BrDbDetectorVolume;
class BrDbMagnetVolume;

class BrGeometryDbManager : public TObject {

public:

  static BrGeometryDbManager* Instance();

// Root is not happy with the protected for the constructor. 
// i.e. one cannot invoke the TBrowser. The destructor also
// has be public otherwise CINT complains.
 protected:
  BrGeometryDbManager();
 public:
  ~BrGeometryDbManager();
public:
  void SetDbFileName(Char_t* filename);
  void SetDebugLevel(Int_t level){fDebugLevel=level;}
  void SetVerbosity(Int_t level){fVerbose=level;}
  void SetVerbose(Int_t level){fVerbose=level;}

  TObject* GetDetectorVolume(const Char_t* classname, const Char_t* detector);
  void List();
  void SetDbModeMySQL();
  void SetAsciiRead(const Char_t *vol,const Char_t *file);
  void Update();

private:
  BrDbObject* GetDbObject(const Char_t* classname, const Char_t* detector);

  TObjArray* fObjectlist;        // List (Map) of object names and actual objects
  TObjArray *fAsciiVolumeList;   //List of volumes to read from ascii file

  Int_t    fDebugLevel;          // Debug Level
  Int_t    fVerbose;             // Verbosity level
  TObjArray fFileList;           //
  static BrGeometryDbManager* fInstance;

  //New variables and methods for implementing access to BRAHMS MySQL Db
  Int_t    fDbMode;              //ASCII or MySQL etc.

  enum EDbModes {
     kModeASCII = 1,
     kModeMySQL = 2
     };

  TObject* GetDetectorVolumeFromMySQL(const Char_t* classname, const Char_t* detector);
  TObject *BuildDetectorVolume(const Char_t *name);
  TObject *BuildMagnetVolume(const Char_t *name);

  ClassDef(BrGeometryDbManager,0) // BRAHMS Database Manager object
};

#endif


// $Log: BrGeometryDbManager.h,v $
// Revision 1.5  2002/04/16 14:44:12  hagel
// Implement Hall Probe reading from Db in ySQL mode.  Major surgery on BrGeometryDbManager concerning building BrDetectorVolume and BrMagnetVolume
//
// Revision 1.4  2002/02/08 22:55:48  hagel
// Take advantage of new features of BrRotMatrix
//
// Revision 1.3  2002/01/31 15:24:07  ouerdane
// added verbosity level and associated setter
//
// Revision 1.2  2001/08/02 03:13:46  hagel
// Yet another iteration on GeometryDB; this should be close to last
//
// Revision 1.1.1.1  2001/06/21 14:55:18  hagel
// Initial revision of brat2
//
// Revision 1.12  2001/05/07 21:22:34  hagel
// Next iteration of Geometry DB
//
// Revision 1.11  2001/03/07 17:40:20  hagel
// Implement MySQL DB access support
//
// Revision 1.10  2000/11/23 01:31:47  brahmlib
// Changed the returned object from operator+.
//
// Revision 1.9  2000/11/22 21:15:27  videbaek
// Geometry manager updated to deal with modified Magnet and DetectorVolume
// as well as with multiple file definitions.
//
// Revision 1.8  2000/05/10 15:56:04  nbi
// Added the classes BrRunsDb, BrGeometriesDb, changed some code, bug
// corrections , and so on. It's almost there ;-)
//
// Revision 1.7  1999/03/07 22:42:28  videbaek
// Remove aprostrofees from several comments. emacs cannot make nice
// layout with those in text. So use do not not dont
//
// Revision 1.6  1999/02/24 15:21:22  hagel
// Enforce const in arguments
//
// Revision 1.5  1999/02/04 20:38:28  hagel
// Added statement so that BrDbObject could support the new class BrParameterDbManager
// See notes in BrParameterDbManager
//
// Revision 1.4  1999/01/21 23:23:21  hagel
// 1. Changed convention for checking includes.  Current convention is:
//    BRAT_Br...... eg BRAT_BrModule ala ROOT.
// 2. Added CVS logs to .h files that did not have them.
// 3. Moved checking of include definition to first line for easier reading
// 4. Put checks before all includes in the include files as per BRAT specifications
// 5. Added BrGeantHeader to Geant Makefile
// 6. All changes have been checked to compile on NT ala Cygnus
//
// Revision 1.3  1998/12/21 20:20:35  videbaek
// added BrMagnetVolume as being managed
//
// Revision 1.1  1998/12/09 17:01:37  videbaek
// Add new db manager class. It has been checked out for
// the simple BrDetectorVolume class.
//
//