source: HiSusy/trunk/Delphes-3.0.0/external/ExRootAnalysis/ExRootTreeBranch.cc @ 1

Last change on this file since 1 was 1, checked in by zerwas, 11 years ago

first import of structure, PYTHIA8 and DELPHES

File size: 2.0 KB
Line 
1
2/** \class ExRootTreeBranch
3*
4*  Class handling object creation
5*  It is also used for output ROOT tree branches
6*
7*  $Date: 2008-06-04 13:57:56 $
8*  $Revision: 1.1 $
9*
10*
11*  \author P. Demin - UCL, Louvain-la-Neuve
12*
13*/
14
15#include "ExRootAnalysis/ExRootTreeBranch.h"
16
17#include "TFile.h"
18#include "TTree.h"
19#include "TString.h"
20#include "TClonesArray.h"
21
22#include <iostream>
23#include <stdexcept>
24#include <sstream>
25
26using namespace std;
27
28//------------------------------------------------------------------------------
29
30ExRootTreeBranch::ExRootTreeBranch(const char *name, TClass *cl, TTree *tree) :
31  fSize(0), fCapacity(1), fData(0)
32{
33  stringstream message;
34//  cl->IgnoreTObjectStreamer();
35//  cl->BypassStreamer();
36  fData = new TClonesArray(cl, fCapacity);
37
38  if(fData)
39  {
40    fData->SetName(name);
41    fData->ExpandCreateFast(fCapacity);
42    fData->Clear();
43    if(tree)
44    {
45      tree->Branch(name, &fData, 64000);
46      tree->Branch(TString(name) + "_size", &fSize, TString(name) + "_size/I");
47    }
48  }
49  else
50  {
51    message << "can't create TClonesArray for branch '" << name << "'";
52    throw runtime_error(message.str());
53  }
54}
55
56//------------------------------------------------------------------------------
57
58ExRootTreeBranch::~ExRootTreeBranch()
59{
60  if(fData) delete fData;
61}
62
63//------------------------------------------------------------------------------
64
65TObject *ExRootTreeBranch::NewEntry()
66{
67  if(!fData) return 0;
68
69  if(fSize >= fCapacity)
70  {
71    if(fCapacity < 10) fCapacity = 10;
72    else if(fCapacity < 30) fCapacity = 30;
73    else if(fCapacity < 100) fCapacity = 100;
74    else if(fCapacity < 250) fCapacity = 250;
75    else fCapacity *= 2;
76
77    fData->ExpandCreateFast(fCapacity);
78
79    fData->Clear();
80    fData->ExpandCreateFast(fSize);
81  }
82 
83  return fData->AddrAt(fSize++);
84}
85
86//------------------------------------------------------------------------------
87
88void ExRootTreeBranch::Clear()
89{
90  fSize = 0;
91  if(fData) fData->Clear();
92}
93
94//------------------------------------------------------------------------------
95
Note: See TracBrowser for help on using the repository browser.