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