Logo ROOT  
Reference Guide
Go to the documentation of this file.
1/// \file
2/// \ingroup tutorial_ProofFriends
4/// Selector to process tree friends
6/// \macro_code
8/// \author Gerardo Ganis (gerardo.ganis@cern.ch)
10#ifndef ProofFriends_h
11#define ProofFriends_h
13#include "TChain.h"
14#include "TSelector.h"
16class TH1F;
17class TH2F;
19class ProofFriends : public TSelector {
20public :
21 TTree *fChain; //!pointer to the analyzed TTree or TChain
23 Bool_t fPlot; // Whether to plot the result
24 Bool_t fDoFriends; // Whether to use the friend tree
26 // Specific members
27 TH2F *fXY;
28 TH1F *fZ;
29 TH1F *fR;
30 TH2F *fRZ;
32 // Declaration of leaf types
33 Int_t Run;
34 Long64_t Event;
35 Float_t x;
36 Float_t y;
37 Float_t z;
39 Float_t r; // The friend
41 // List of branches
42 TBranch *b_Run; //!
43 TBranch *b_Event; //!
44 TBranch *b_x; //!
45 TBranch *b_y; //!
46 TBranch *b_z; //!
48 TBranch *b_r; //! The friend branch
50 ProofFriends();
51 virtual ~ProofFriends() { }
52 virtual Int_t Version() const { return 2; }
53 virtual void Begin(TTree *tree);
54 virtual void SlaveBegin(TTree *tree);
55 virtual void Init(TTree *tree);
56 virtual Bool_t Notify();
57 virtual Bool_t Process(Long64_t entry);
58 virtual Int_t GetEntry(Long64_t entry, Int_t getall = 0) { return fChain ? fChain->GetTree()->GetEntry(entry, getall) : 0; }
59 virtual void SetOption(const char *option) { fOption = option; }
60 virtual void SetObject(TObject *obj) { fObject = obj; }
61 virtual void SetInputList(TList *input) { fInput = input; }
62 virtual TList *GetOutputList() const { return fOutput; }
63 virtual void SlaveTerminate();
64 virtual void Terminate();
66 ClassDef(ProofFriends,0);
71#ifdef ProofFriends_cxx
74 // The Init() function is called when the selector needs to initialize
75 // a new tree or chain. Typically here the branch addresses and branch
76 // pointers of the tree will be set.
77 // It is normally not necessary to make changes to the generated
78 // code, but the routine can be extended by the user if needed.
79 // Init() will be called many times when running on PROOF
80 // (once per file to be processed).
82 // Set branch addresses and branch pointers
83 if (!tree) return;
84 fChain = tree;
85 fChain->SetMakeClass(1);
87 fChain->SetBranchAddress("Run", &Run, &b_Run);
88 fChain->SetBranchAddress("Event", &Event, &b_Event);
89 fChain->SetBranchAddress("x", &x, &b_x);
90 fChain->SetBranchAddress("y", &y, &b_y);
91 fChain->SetBranchAddress("z", &z, &b_z);
93 fChain->SetBranchAddress("r", &r, &b_r); // The friend
96Bool_t ProofFriends::Notify()
98 // The Notify() function is called when a new file is opened. This
99 // can be either for a new TTree in a TChain or when when a new TTree
100 // is started when using PROOF. It is normally not necessary to make changes
101 // to the generated code, but the routine can be extended by the
102 // user if needed. The return value is currently not used.
104 return kTRUE;
107#endif // #ifdef ProofFriends_cxx
ROOT::R::TRInterface & r
Definition: Object.C:4
int Int_t
Definition: RtypesCore.h:45
bool Bool_t
Definition: RtypesCore.h:63
long long Long64_t
Definition: RtypesCore.h:73
float Float_t
Definition: RtypesCore.h:57
const Bool_t kTRUE
Definition: RtypesCore.h:91
#define ClassDef(name, id)
Definition: Rtypes.h:325
A TTree is a list of TBranches.
Definition: TBranch.h:89
1-D histogram with a float per channel (see TH1 documentation)}
Definition: TH1.h:575
2-D histogram with a float per channel (see TH1 documentation)}
Definition: TH2.h:251
A doubly linked list.
Definition: TList.h:44
Mother of all ROOT objects.
Definition: TObject.h:37
A TSelector object is used by the TTree::Draw, TTree::Scan, TTree::Process to navigate in a TTree and...
Definition: TSelector.h:31
virtual void SetObject(TObject *obj)
Definition: TSelector.h:65
virtual void Init(TTree *)
Definition: TSelector.h:53
virtual int Version() const
Definition: TSelector.h:52
TSelectorList * fOutput
! List of objects created during processing
Definition: TSelector.h:42
virtual Bool_t Process(Long64_t)
Definition: TSelector.cxx:330
virtual void SlaveBegin(TTree *)
Definition: TSelector.h:55
virtual Int_t GetEntry(Long64_t, Int_t=0)
Definition: TSelector.h:59
virtual void SetOption(const char *option)
Definition: TSelector.h:64
virtual void SetInputList(TList *input)
Definition: TSelector.h:66
virtual TList * GetOutputList() const
Definition: TSelector.h:69
virtual Bool_t Notify()
This method must be overridden to handle object notification.
Definition: TSelector.h:56
virtual void SlaveTerminate()
Definition: TSelector.h:70
virtual void Begin(TTree *)
Definition: TSelector.h:54
virtual void Terminate()
Definition: TSelector.h:71
A TTree represents a columnar dataset.
Definition: TTree.h:79
virtual Int_t SetBranchAddress(const char *bname, void *add, TBranch **ptr=0)
Change branch address, dealing with clone trees properly.
Definition: TTree.cxx:8332
virtual void SetMakeClass(Int_t make)
Set all the branches in this TTree to be in decomposed object mode (also known as MakeClass mode).
Definition: TTree.cxx:9119
virtual TTree * GetTree() const
Definition: TTree.h:513
virtual Int_t GetEntry(Long64_t entry=0, Int_t getall=0)
Read all branches of entry and return total number of bytes read.
Definition: TTree.cxx:5601
Double_t y[n]
Definition: legend1.C:17
Double_t x[n]
Definition: legend1.C:17
void Init(TClassEdit::TInterpreterLookupHelper *helper)
Definition: TClassEdit.cxx:171
Definition: tree.py:1