#ifndef ROOT_TBasket
#define ROOT_TBasket

//+SEQ,CopyRight,T=NOINCLUDE.

//////////////////////////////////////////////////////////////////////////
//                                                                      //
// TBasket                                                              //
//                                                                      //
// The TBasket objects are created at run time to collect TTree events  //
// in buffers. When a Basket is full, it is written to the file.        //
// The Basket is kept in memory if there is enough space.               //
//  (see the fMaxVirtualsize of TTree).                                 //
//                                                                      //
// The Basket class derives from TKey.                                  //
//////////////////////////////////////////////////////////////////////////


#ifndef ROOT_TKey
//*KEEP,TKey.
#include "TKey.h"
//*KEND.
#endif


class TTree;
class TBasket;
class TBranch;
class TLeaf;

class TBasket : public TKey {

protected:
    Int_t       fBufferSize;      //fBuffer length in bytes
    Int_t       fNevBufSize;      //Length in Int_t of fEventOffset
    Int_t       fNevBuf;          //Number of events in basket
    Int_t       fLast;            //Pointer to last used byte in basket
    Bool_t      fWritingBuffer;   //True when writing buffer
    char        *fZipBuffer;      //Basket compressed buffer (if compression)
    Int_t       *fEventOffset;    //Offset of events in fBuffer(TKey)
    TBranch     *fBranch;         //Pointer to the basket support branch

public:
    TBasket();
    TBasket(const Text_t *name, const Text_t *title, TBranch *branch);
    virtual ~TBasket();

    virtual void    AdjustSize(Int_t newsize);
    virtual Int_t   DropBuffers();
    TBranch         *GetBranch() {return fBranch;}
    virtual Int_t   GetBufferSize() {return fBufferSize;}
    virtual Int_t   *GetEventOffset() {return fEventOffset;}
    virtual Int_t   GetEventPointer(Int_t event);
    char            *GetZipBuffer() {return fZipBuffer;}
    virtual Int_t   GetNevBuf() {return fNevBuf;}
    virtual Int_t   GetNevBufSize() {return fNevBufSize;}
    virtual Int_t   GetLast() {return fLast;}
    virtual void    Print(Option_t *option="");
    virtual void    ReadBasketBuffers();
    virtual void    Reset(Option_t *option="");

    virtual void    SetNevBufSize(Int_t n) {fNevBufSize=n;}
    virtual void    SetReadMode();
    virtual void    SetWriteMode();
    virtual void    Update(Int_t newlast);
    virtual Int_t   WriteBuffer();

    ClassDef(TBasket,1)  //the TBranch event buffers
};

#endif