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// @(#)root/hbook:$Id$
// Author: Rene Brun   18/02/2002

 * Copyright (C) 1995-2002, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *

#ifndef ROOT_THbookTree
#define ROOT_THbookTree

//                                                                      //
// THbookTree                                                           //
//                                                                      //
// A wrapper class supporting Hbook ntuples (CWN and RWN).              //
// The normal TTree calls can be used, including TTree::Draw().         //
// Data read directly from the Hbook file via THbookFile.               //
//                                                                      //

#ifndef ROOT_TTree
#include "TTree.h"
#ifndef ROOT_THbookFile
#include "THbookFile.h"

class THbookTree : public TTree {

   Int_t       fID;         //Hbook identifier
   Int_t       fType;       //RWN (0) or CWN (1)
   char       *fX;          //storage area for RWN
   Bool_t      fInit;       //flag to know if branches computed
   THbookFile *fFile;       //pointer to Hbook file

   THbookTree(const char *name, Int_t id);
   virtual ~THbookTree();
   virtual Int_t     GetEntry(Long64_t entry=0, Int_t getall=0);
   THbookFile       *GetHbookFile() {return fFile;}
   virtual Int_t     GetID() {return fID;}
   virtual Int_t     GetType() {return fType;}
           Float_t  *GetX() {return (Float_t*)fX;}
   virtual void      InitBranches(Long64_t entry);
           char     *MakeX(Int_t nvars) {fX = new char[nvars]; return fX;}
   virtual void      Print(Option_t *option="") const;
   virtual Long64_t  SetEntries(Long64_t n=-1);
   virtual void      SetHbookFile(THbookFile *file) {fFile = file;}
   virtual void      SetType(Int_t atype) {fType = atype;}

   ClassDef(THbookTree,1)  //A wrapper class supporting Hbook ntuples (CWN and RWN)