3 //____________________________________________________________________
4 //////////////////////////////////////////////////////////////////////
6 // class AliHBTReaderESD //
8 // Reader for ALICE Event Summary Data (ESD). //
10 // Piotr.Skowronski@cern.ch //
12 //////////////////////////////////////////////////////////////////////
17 #include <TObjString.h>
23 #include <AliESDtrack.h>
24 #include <AliJetEventParticles.h>
25 #include "AliJetParticlesReaderESD.h"
27 ClassImp(AliJetParticlesReaderESD)
29 AliJetParticlesReaderESD::AliJetParticlesReaderESD(const Char_t* esdfilename) :
30 AliJetParticlesReader(),
31 fESDFileName(esdfilename),
36 fPassFlag(AliESDtrack::kTPCrefit)
41 /********************************************************************/
43 AliJetParticlesReaderESD::AliJetParticlesReaderESD(
45 const Char_t* esdfilename) :
46 AliJetParticlesReader(dirs),
47 fESDFileName(esdfilename),
52 fPassFlag(AliESDtrack::kTPCrefit)
57 /********************************************************************/
59 AliJetParticlesReaderESD::~AliJetParticlesReaderESD()
62 if(fFile) delete fFile;
64 if(fTree) delete fTree;
65 if(fKeyIterator) delete fKeyIterator;
69 Int_t AliJetParticlesReaderESD::ReadNext()
71 //reads next event from fFile
73 do // is OK even if 0 dirs specified,
74 { // in that case we try to read from "./"
77 fFile = OpenFile(fCurrentDir);
80 Error("ReadNext","Cannot get fFile for dir no. %d",fCurrentDir);
86 //fFile->GetListOfKeys()->Print();
88 if(fTree) delete fTree;
89 fTree = dynamic_cast<TTree*>(fFile->Get("esdTree"));
91 fTree->SetBranchAddress("ESD",&fESD);
93 fKeyIterator = new TIter(fFile->GetListOfKeys());
98 if(fCurrentEvent>=fTree->GetEntries())
107 fTree->GetEvent(fCurrentEvent);
110 { // "old" way via ESD objects stored in root file
111 TKey* key = (TKey*)fKeyIterator->Next();
117 delete fFile; //we have to assume there are no more ESD objects in the fFile
121 TString esdname = "ESD";
122 esdname+=fCurrentEvent;
123 if(fESD) delete fESD;
124 fESD = dynamic_cast<AliESD*>(fFile->Get(esdname));
127 Info("ReadNext","Can not find AliESD object named %s",esdname.Data());
131 delete fFile;//we have to assume there is no more ESD objects in the fFile
139 return kTRUE;//success -> read one event
140 } while(fCurrentDir < GetNumberOfDirs());
141 //end of loop over directories specified in fDirs Obj Array
142 return kFALSE; //no more directories to read
145 /**********************************************************/
147 Int_t AliJetParticlesReaderESD::ReadESD(AliESD* esd)
153 Error("ReadESD","ESD is NULL");
157 //TDatabasePDG* pdgdb = TDatabasePDG::Instance();
160 // Error("ReadESD","Can not get PDG Database Instance.");
164 //Float_t mf = esd->GetMagneticField();
165 //if ( (mf == 0.0) && (fNTrackPoints > 0) )
167 // Error("ReadESD","Magnetic Field is 0 and Track Points demanded. Skipping to next event.");
171 Info("ReadESD","Reading Event %d",fCurrentEvent);
172 if((!fOwner) || (fEventParticles==0))
173 fEventParticles = new AliJetEventParticles();
175 Double_t vertexpos[3];//vertex position
176 const AliESDVertex* kvertex = esd->GetVertex();
179 Info("ReadESD","ESD returned NULL pointer to vertex - assuming (0.0,0.0,0.0)");
186 kvertex->GetXYZ(vertexpos);
188 fEventParticles->SetVertex(vertexpos[0],vertexpos[1],vertexpos[2]);
190 const Int_t kntr = esd->GetNumberOfTracks();
191 Info("ReadESD","Found %d tracks.",kntr);
192 for (Int_t i = 0;i<kntr; i++)
194 const AliESDtrack *kesdtrack = esd->GetTrack(i);
197 Error("ReadESD","Can not get track %d", i);
201 if ((kesdtrack->GetStatus() & fPassFlag) == kFALSE)
203 Info("ReadNext","Particle skipped: %ud.",kesdtrack->GetStatus());
207 Double_t mom[3]; //momentum
208 kesdtrack->GetPxPyPz(mom);
209 //kesdtrack->GetConstrainedPxPyPz(mom);
210 //Double_t pos[3];//position
211 //kesdtrack->GetXYZ(pos);
212 //kesdtrack->GetConstrainedXYZ(pos);
213 const Float_t kmass=kesdtrack->GetMass();
214 const Float_t kp2=mom[0]*mom[0]+mom[1]*mom[1]+mom[2]*mom[2];
215 const Float_t ketot=TMath::Sqrt(kmass*kmass+kp2);
216 const Float_t kpt=TMath::Sqrt(mom[0]*mom[0]+mom[1]*mom[1]);
217 const Float_t kp=TMath::Sqrt(kp2);
218 const Float_t keta=0.5*TMath::Log((kp+mom[2]+1e-30)/(kp-mom[2]+1e-30));
219 const Float_t kphi=TMath::Pi()+TMath::ATan2(-mom[1],-mom[0]);
220 if(IsAcceptedParticle(kpt,kphi,keta))
221 fEventParticles->AddParticle(mom[0],mom[1],mom[2],ketot,i,kesdtrack->GetLabel(),kpt,kphi,keta);
223 } // loop over tracks
228 /**********************************************************/
230 void AliJetParticlesReaderESD::Rewind()
234 if(fFile) delete fFile;
235 if(fKeyIterator) delete fKeyIterator;
242 /**********************************************************/
244 TFile* AliJetParticlesReaderESD::OpenFile(Int_t n)
246 //opens fFile with kine tree
248 const TString& dirname = GetDirName(n);
251 Error("OpenFiles","Can not get directory name");
254 TString filename = dirname +"/"+ fESDFileName;
255 TFile *ret = TFile::Open(filename.Data());
258 Error("OpenFiles","Can't open fFile %s",filename.Data());
263 Error("OpenFiles","Can't open fFile %s",filename.Data());