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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