1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
16 //-------------------------------------------------------------------------
18 // ESD reader for jet analysis
19 // Author: Mercedes Lopez Noriega (mercedes.lopez.noriega@cern.ch)
20 //-------------------------------------------------------------------------
23 #include <Riostream.h>
25 #include <TLorentzVector.h>
27 #include "AliJetESDReader.h"
28 #include "AliJetESDReaderHeader.h"
30 #include "AliESDtrack.h"
32 ClassImp(AliJetESDReader)
34 AliJetESDReader::AliJetESDReader()
42 //____________________________________________________________________________
44 AliJetESDReader::~AliJetESDReader()
49 //____________________________________________________________________________
51 void AliJetESDReader::OpenInputFiles()
55 fChain = new TChain("esdTree");
57 // get directory and pattern name from the header
58 const char* dirName=fReaderHeader->GetDirectory();
59 const char* pattern=fReaderHeader->GetPattern();
61 // Add files matching patters to the chain
62 void *dir = gSystem->OpenDirectory(dirName);
63 const char *name = 0x0;
64 int nesd = fReaderHeader->GetNesd();
66 while ((name = gSystem->GetDirEntry(dir))){
67 if (a>=nesd) continue;
68 if (strstr(name,pattern)){
69 printf("Adding %s\n",name);
71 sprintf(path,"%s/%s",dirName,name);
72 fChain->AddFile(path,-1);
76 printf("%d ESDs added\n",a);
78 gSystem->FreeDirectory(dir);
79 fChain->SetBranchAddress("ESD", &fESD);
81 int nMax = fChain->GetEntries();
82 printf("\nTotal number of events in chain= %d",nMax);
84 // set number of events in header
85 if (fReaderHeader->GetLastEvent() == -1)
86 fReaderHeader->SetLastEvent(nMax);
88 Int_t nUsr = fReaderHeader->GetLastEvent();
89 fReaderHeader->SetLastEvent(TMath::Min(nMax,nUsr));
93 //____________________________________________________________________________
95 void AliJetESDReader::FillMomentumArray(Int_t event)
97 // Fill momentum array
104 // clear momentum array
107 // get event from chain
108 fChain->GetEntry(event);
110 // get number of tracks in event (for the loop)
111 nt = fESD->GetNumberOfTracks();
113 // temporary storage of signal and pt cut flag
114 Int_t* sflag = new Int_t[nt];
115 Int_t* cflag = new Int_t[nt];
117 // get cuts set by user
118 Float_t ptMin = fReaderHeader->GetPtCut();
119 Float_t etaMin = fReaderHeader->GetFiducialEtaMin();
120 Float_t etaMax = fReaderHeader->GetFiducialEtaMax();
123 for (Int_t it = 0; it < nt; it++) {
124 AliESDtrack *track = fESD->GetTrack(it);
125 UInt_t status = track->GetStatus();
128 track->GetPxPyPz(mom);
129 p3.SetXYZ(mom[0],mom[1],mom[2]);
131 if (((status & AliESDtrack::kITSrefit) == 0) ||
132 ((status & AliESDtrack::kTPCrefit) == 0)) continue; // quality check
133 if (((AliJetESDReaderHeader*) fReaderHeader)->ReadSignalOnly()
134 && TMath::Abs(track->GetLabel()) > 10000) continue; // quality check
135 if (((AliJetESDReaderHeader*) fReaderHeader)->ReadBkgdOnly()
136 && TMath::Abs(track->GetLabel()) < 10000) continue; // quality check
138 if ( (eta > etaMax) || (eta < etaMin)) continue; // checking eta cut
140 new ((*fMomentumArray)[goodTrack]) TLorentzVector(p3,p3.Mag());
142 if (TMath::Abs(track->GetLabel()) < 10000) sflag[goodTrack]=1;
144 if (pt > ptMin) cflag[goodTrack]=1; // pt cut
147 // set the signal flags
148 fSignalFlag.Set(goodTrack,sflag);
149 fCutFlag.Set(goodTrack,cflag);