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THbookTree.h
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1// @(#)root/hbook:$Id$
2// Author: Rene Brun 18/02/2002
3
4/*************************************************************************
5 * Copyright (C) 1995-2002, Rene Brun and Fons Rademakers. *
6 * All rights reserved. *
7 * *
8 * For the licensing terms see $ROOTSYS/LICENSE. *
9 * For the list of contributors see $ROOTSYS/README/CREDITS. *
10 *************************************************************************/
11
12#ifndef ROOT_THbookTree
13#define ROOT_THbookTree
14
15
16//////////////////////////////////////////////////////////////////////////
17// //
18// THbookTree //
19// //
20// A wrapper class supporting Hbook ntuples (CWN and RWN). //
21// The normal TTree calls can be used, including TTree::Draw(). //
22// Data read directly from the Hbook file via THbookFile. //
23// //
24//////////////////////////////////////////////////////////////////////////
25
26#include "TTree.h"
27#include "THbookFile.h"
28
29
30class THbookTree : public TTree {
31
32protected:
33 Int_t fID; //Hbook identifier
34 Int_t fType; //RWN (0) or CWN (1)
35 char *fX; //storage area for RWN
36 Bool_t fInit; //flag to know if branches computed
37 THbookFile *fFile; //pointer to Hbook file
38
39public:
40 THbookTree();
41 THbookTree(const char *name, Int_t id);
42 ~THbookTree() override;
43 Int_t GetEntry(Long64_t entry=0, Int_t getall=0) override;
45 virtual Int_t GetID() {return fID;}
46 virtual Int_t GetType() {return fType;}
47 Float_t *GetX() {return (Float_t*)fX;}
48 virtual void InitBranches(Long64_t entry);
49 char *MakeX(Int_t nvars) {fX = new char[nvars]; return fX;}
50 void Print(Option_t *option="") const override;
51 Long64_t SetEntries(Long64_t n=-1) override;
52 virtual void SetHbookFile(THbookFile *file) {fFile = file;}
53 virtual void SetType(Int_t atype) {fType = atype;}
54
55 ClassDefOverride(THbookTree,1) //A wrapper class supporting Hbook ntuples (CWN and RWN)
56};
57
58#endif
float Float_t
Definition RtypesCore.h:57
long long Long64_t
Definition RtypesCore.h:69
const char Option_t
Definition RtypesCore.h:66
#define ClassDefOverride(name, id)
Definition Rtypes.h:346
Option_t Option_t option
char name[80]
Definition TGX11.cxx:110
This class is an interface to the Hbook objects in Hbook files.
Definition THbookFile.h:29
A wrapper class supporting Hbook ntuples (CWN and RWN).
Definition THbookTree.h:30
Float_t * GetX()
Definition THbookTree.h:47
virtual void SetType(Int_t atype)
Definition THbookTree.h:53
char * MakeX(Int_t nvars)
Definition THbookTree.h:49
Int_t GetEntry(Long64_t entry=0, Int_t getall=0) override
get one entry from the hbook ntuple
Long64_t SetEntries(Long64_t n=-1) override
Set the number of entries in the tree header and its branches.
virtual Int_t GetID()
Definition THbookTree.h:45
THbookTree()
default constructor
virtual Int_t GetType()
Definition THbookTree.h:46
void Print(Option_t *option="") const override
Print an overview of the hbook ntuple.
Int_t fID
Definition THbookTree.h:33
THbookFile * GetHbookFile()
Definition THbookTree.h:44
THbookFile * fFile
Definition THbookTree.h:37
~THbookTree() override
destructor
Int_t fType
Definition THbookTree.h:34
Bool_t fInit
Definition THbookTree.h:36
virtual void SetHbookFile(THbookFile *file)
Definition THbookTree.h:52
char * fX
Definition THbookTree.h:35
virtual void InitBranches(Long64_t entry)
Initialize the branch addresses.
A TTree represents a columnar dataset.
Definition TTree.h:79
const Int_t n
Definition legend1.C:16