[1] | 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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