#ifndef VEGA_VVirtualFrameInfoDB
#define VEGA_VVirtualFrameInfoDB

//*-- Author :    Damir Buskulic   19/11/01

//////////////////////////////////////////////////////////////////////////
//                                                                      //
// VVirtualFrameInfoDB                                                  //
//                                                                      //
// Virtual frame information (metadata) data base                       //
//                                                                      //
//////////////////////////////////////////////////////////////////////////

#include <string>
#include "TObject.h"
#include "VMetaData.h"
#include "VConditionSet.h"
#include "VVirtualMetaDBPlayer.h"
#include "VConditionNames.h"

using namespace std;

class VConditionSet;

class VVirtualFrameInfoDB : public TObject
{
public :
   VVirtualFrameInfoDB();
   virtual ~VVirtualFrameInfoDB();
    
// Opening and building the info metadatabase

   virtual void          Build(char* pathtofiles, char* filename, Option_t* option="R") {}
   virtual Bool_t        Open(char* pathtoDB, Option_t* openopt = "READ") {return 0;}
   virtual Int_t         AddFiles(const char* filenames, Option_t* option="R") {return 0;}
   virtual void          Close() {}

// Factory part. Creating objects exchanged by the database
   
   virtual VConditionSet* CreateConditionSet(const char* condfs, const char* selfs=0);
   
// Drawing and getting information about the database
   
   virtual VVirtualMetaDBPlayer* GetPlayer() {return 0;}
   virtual void          Draw(const char* selexp, const char* selection="", Option_t* option = "", Double_t start = 0, Double_t length = 0) {}
   virtual const char*   GetPathToDB() {return 0;}
   virtual const char*   GetOption() {return 0;}
   virtual Bool_t        IsOpened() {return 0;}
   virtual VConditionNames*  GetConditionNames() const {return 0;}
   virtual Int_t         GetNConditions() {return 0;}
   virtual Double_t      GetStart() {return 0;}
   virtual Double_t      GetEnd() {return 0;}
   virtual void          Print(Option_t* opt="") {}
   virtual char*         GetStatus() {return 0;}
   
// Getting the metadata information
   virtual void          GetMetaData(VMetaData* meta, Double_t time) {}
   virtual void          NextMetaData(VMetaData* meta) {}
   virtual void          NextMetaData(VMetaData* meta, VConditionSet* condset) {}
   virtual void          NextMetaData(VMetaData* meta, Double_t time, const char* selection) {}
   virtual void          NextMetaData(VMetaData* meta, Double_t time, VConditionSet* condset) {}
   virtual void          PreviousMetaData(VMetaData* meta) {}
   virtual void          GetConditionSet(VConditionSet* condset, Double_t start, const char* condformula, const char* selformula) {}

// // Dealing with conditions
//    
//    virtual Int_t         LoadNearestGECondition(Double_t gpstime, const char* name);
//    virtual Int_t         LoadNextCondition(char* name);
//    virtual VFrCondition* GetLoadedCondition(const char* name);
      
   ClassDef(VVirtualFrameInfoDB,0) // ABC describing a meta database
};

#endif