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source: git/external/ExRootAnalysis/ExRootTreeWriter.cc@ 7fc0708

Last change on this file since 7fc0708 was dc883b4, checked in by Pavel Demin <pavel.demin@…>, 4 years ago

add info to TreeWriter

  • Property mode set to 100644
File size: 2.4 KB
Line 
1
2/** \class ExRootTreeWriter
3 *
4 * Class handling output ROOT tree
5 *
6 * \author P. Demin - UCL, Louvain-la-Neuve
7 *
8 */
9
10#include "ExRootAnalysis/ExRootTreeWriter.h"
11#include "ExRootAnalysis/ExRootTreeBranch.h"
12
13#include "TParameter.h"
14#include "TClonesArray.h"
15#include "TFile.h"
16#include "TROOT.h"
17#include "TTree.h"
18
19#include <iostream>
20#include <sstream>
21#include <stdexcept>
22
23using namespace std;
24
25ExRootTreeWriter::ExRootTreeWriter(TFile *file, const char *treeName) :
26 fFile(file), fTree(0), fTreeName(treeName)
27{
28}
29
30//------------------------------------------------------------------------------
31
32ExRootTreeWriter::~ExRootTreeWriter()
33{
34 set<ExRootTreeBranch *>::iterator itBranches;
35 for(itBranches = fBranches.begin(); itBranches != fBranches.end(); ++itBranches)
36 {
37 delete(*itBranches);
38 }
39
40 if(fTree) delete fTree;
41}
42
43//------------------------------------------------------------------------------
44
45ExRootTreeBranch *ExRootTreeWriter::NewBranch(const char *name, TClass *cl)
46{
47 if(!fTree) fTree = NewTree();
48 ExRootTreeBranch *branch = new ExRootTreeBranch(name, cl, fTree);
49 fBranches.insert(branch);
50 return branch;
51}
52
53//------------------------------------------------------------------------------
54
55void ExRootTreeWriter::AddInfo(const char *name, Double_t value)
56{
57 if(!fTree) fTree = NewTree();
58 fTree->GetUserInfo()->Add(new TParameter<Double_t>(name, value));
59}
60
61//------------------------------------------------------------------------------
62
63void ExRootTreeWriter::Fill()
64{
65 if(fTree) fTree->Fill();
66}
67
68//------------------------------------------------------------------------------
69
70void ExRootTreeWriter::Write()
71{
72 fFile = fTree ? fTree->GetCurrentFile() : 0;
73 if(fFile) fFile->Write();
74}
75
76//------------------------------------------------------------------------------
77
78void ExRootTreeWriter::Clear()
79{
80 set<ExRootTreeBranch *>::iterator itBranches;
81 for(itBranches = fBranches.begin(); itBranches != fBranches.end(); ++itBranches)
82 {
83 (*itBranches)->Clear();
84 }
85}
86
87//------------------------------------------------------------------------------
88
89TTree *ExRootTreeWriter::NewTree()
90{
91 if(!fFile) return 0;
92
93 TTree *tree = 0;
94 TDirectory *dir = gDirectory;
95
96 fFile->cd();
97 tree = new TTree(fTreeName, "Analysis tree");
98 dir->cd();
99
100 if(!tree)
101 {
102 throw runtime_error("can't create output ROOT tree");
103 }
104
105 tree->SetDirectory(fFile);
106 tree->SetAutoSave(10000000); // autosave when 10 MB written
107
108 return tree;
109}
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