#ifndef VEGA_VFramesBuffer
#define VEGA_VFramesBuffer

//*-- Author :    Damir Buskulic   20/05/99

#include "FrameL.h"
#include "VMetaData.h"
#include "VFrameChannel.h"
#include "VConditionSet.h"

//////////////////////////////////////////////////////////////////////////
//                                                                      //
// VFramesBuffer                                                        //
//                                                                      //
// Buffer of frames used as a cache when reading frames                 //
//                                                                      //
//////////////////////////////////////////////////////////////////////////

class VFrameChannel;

class VFramesBuffer
{
private :
   Int_t        mBufSize;    // Size of the buffer
   FrameH**     mFramesBuf;  // Array of memory cached frames
   VMetaData*   mMetaData;   // Meta data of cached frames
   Int_t*       mIsComplete; // If a frame is loaded by part, it is incomplete
   Int_t        mBufCur;     // Current position of the buffer index (newest frame)
   VFrameChannel* mFrameChannel;   // Database using this buffer

   virtual void     PutInBuffer(FrameH* frame, VMetaData* meta);
   virtual void     Rearrange(Int_t ibuf);

public :
   VFramesBuffer(VFrameChannel* vfrdb);
   virtual ~VFramesBuffer();
   virtual FrameH*  GetFrameCopy(VMetaData* meta);
   virtual FrameH*  GetFrame(VMetaData* meta);
   virtual FrVect*  GetVectCopy(VMetaData* meta, char* vectname);
   virtual FrVect*  GetVect(VMetaData* meta, char* vectname);

   ClassDef(VFramesBuffer,0)   // Frame buffer used as cache for reading
};
#endif