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