Bugfix.
[u/mrichter/AliRoot.git] / JETAN / AliJetParticlesReaderESD.cxx
CommitLineData
d7c6ab14 1// $Id$
2
3//____________________________________________________________________
4//////////////////////////////////////////////////////////////////////
5// //
6// class AliHBTReaderESD //
7// //
8// Reader for ALICE Event Summary Data (ESD). //
9// //
10// Piotr.Skowronski@cern.ch //
11// //
12//////////////////////////////////////////////////////////////////////
13
d9a296b1 14#include <Riostream.h>
d7c6ab14 15#include <TMath.h>
16#include <TPDGCode.h>
17#include <TString.h>
18#include <TObjString.h>
19#include <TTree.h>
20#include <TFile.h>
21#include <TKey.h>
22#include <TH1.h>
23#include <AliESD.h>
24#include <AliESDtrack.h>
04a02430 25#include <AliKalmanTrack.h>
d7c6ab14 26#include <AliJetEventParticles.h>
27#include "AliJetParticlesReaderESD.h"
28
29ClassImp(AliJetParticlesReaderESD)
30
301a24f1 31AliJetParticlesReaderESD::AliJetParticlesReaderESD(Bool_t constrained,
32 const Char_t* esdfilename) :
d7c6ab14 33 AliJetParticlesReader(),
301a24f1 34 fConstrained(constrained),
d7c6ab14 35 fESDFileName(esdfilename),
5d60c8f9 36 fESD(0),
d7c6ab14 37 fFile(0),
5d60c8f9 38 fTree(0),
d7c6ab14 39 fKeyIterator(0),
40 fPassFlag(AliESDtrack::kTPCrefit)
41{
42 //constructor
43}
44
45/********************************************************************/
46
47AliJetParticlesReaderESD::AliJetParticlesReaderESD(
301a24f1 48 Bool_t constrained,
d7c6ab14 49 TObjArray* dirs,
50 const Char_t* esdfilename) :
51 AliJetParticlesReader(dirs),
301a24f1 52 fConstrained(constrained),
d7c6ab14 53 fESDFileName(esdfilename),
5d60c8f9 54 fESD(0),
d7c6ab14 55 fFile(0),
5d60c8f9 56 fTree(0),
d7c6ab14 57 fKeyIterator(0),
58 fPassFlag(AliESDtrack::kTPCrefit)
59{
60 //constructor
61}
62
63/********************************************************************/
64
65AliJetParticlesReaderESD::~AliJetParticlesReaderESD()
66{
67 //desctructor
5d60c8f9 68 if(fESD) delete fESD;
69 if(fTree) delete fTree;
d7c6ab14 70 if(fKeyIterator) delete fKeyIterator;
04a02430 71 if(fFile) delete fFile;
d7c6ab14 72}
73
d7c6ab14 74/**********************************************************/
75
76Int_t AliJetParticlesReaderESD::ReadESD(AliESD* esd)
77{
78 //Reads one ESD
79
80 if (esd == 0)
81 {
82 Error("ReadESD","ESD is NULL");
83 return kFALSE;
84 }
85
86 //TDatabasePDG* pdgdb = TDatabasePDG::Instance();
87 //if (pdgdb == 0)
88 //{
89 // Error("ReadESD","Can not get PDG Database Instance.");
90 // return kFALSE;
91 // }
92
04a02430 93 Float_t mf = esd->GetMagneticField();
94 if (mf <= 0.0)
95 {
96 Error("ReadESD","Magnetic Field is 0. Skipping to next event.");
97 return kFALSE;
98 }
99 AliKalmanTrack::SetMagneticField(mf/10.);
d7c6ab14 100
101 Info("ReadESD","Reading Event %d",fCurrentEvent);
102 if((!fOwner) || (fEventParticles==0))
103 fEventParticles = new AliJetEventParticles();
104
04a02430 105 const Int_t kntr = esd->GetNumberOfTracks();
106 Info("ReadESD","Found %d tracks.",kntr);
107 fEventParticles->Reset(kntr);
108
109 TString headdesc="";
110 headdesc+="Run ";
111 headdesc+=esd->GetRunNumber();
112 headdesc+=": Ev ";
113 headdesc+=esd->GetEventNumber();
114 fEventParticles->SetHeader(headdesc);
115
d7c6ab14 116 Double_t vertexpos[3];//vertex position
117 const AliESDVertex* kvertex = esd->GetVertex();
118 if (kvertex == 0)
119 {
120 Info("ReadESD","ESD returned NULL pointer to vertex - assuming (0.0,0.0,0.0)");
121 vertexpos[0] = 0.0;
122 vertexpos[1] = 0.0;
123 vertexpos[2] = 0.0;
124 }
125 else
126 {
127 kvertex->GetXYZ(vertexpos);
128 }
129 fEventParticles->SetVertex(vertexpos[0],vertexpos[1],vertexpos[2]);
130
04a02430 131 //loop over tracks
d7c6ab14 132 for (Int_t i = 0;i<kntr; i++)
133 {
134 const AliESDtrack *kesdtrack = esd->GetTrack(i);
135 if (kesdtrack == 0)
136 {
04a02430 137 Error("ReadESD","Can't get track %d", i);
d7c6ab14 138 continue;
139 }
140
d9a296b1 141 if ((kesdtrack->GetStatus() & fPassFlag)) // != fPassFlag)
d7c6ab14 142 {
5d60c8f9 143 Info("ReadNext","Particle skipped: %ud.",kesdtrack->GetStatus());
d7c6ab14 144 continue;
145 }
146
147 Double_t mom[3]; //momentum
301a24f1 148 Double_t xyz[3]; //position
149 if (fConstrained) {
150 if (kesdtrack->GetConstrainedChi2() > 25) continue;
151 kesdtrack->GetConstrainedPxPyPz(mom);
152 kesdtrack->GetConstrainedXYZ(xyz);
153 } else {
154 kesdtrack->GetPxPyPz(mom);
155 kesdtrack->GetXYZ(xyz);
156 }
d7c6ab14 157 const Float_t kmass=kesdtrack->GetMass();
158 const Float_t kp2=mom[0]*mom[0]+mom[1]*mom[1]+mom[2]*mom[2];
159 const Float_t ketot=TMath::Sqrt(kmass*kmass+kp2);
160 const Float_t kpt=TMath::Sqrt(mom[0]*mom[0]+mom[1]*mom[1]);
161 const Float_t kp=TMath::Sqrt(kp2);
162 const Float_t keta=0.5*TMath::Log((kp+mom[2]+1e-30)/(kp-mom[2]+1e-30));
163 const Float_t kphi=TMath::Pi()+TMath::ATan2(-mom[1],-mom[0]);
301a24f1 164 //Double_t dx = xyz[0]-vertexpos[0];
165 //Double_t dy = xyz[1]-vertexpos[1];
166 //Float_t dca = TMath::Sqrt(dx*dx + dy*dy);
167 //Float_t dz = xyz[2]-vertexpos[2];
168 UInt_t index[6];
169 const Int_t kncl=kesdtrack->GetITSclusters(index)
170 +kesdtrack->GetTPCclusters(NULL)
171 +kesdtrack->GetTRDclusters(NULL);
d7c6ab14 172 if(IsAcceptedParticle(kpt,kphi,keta))
301a24f1 173 fEventParticles->AddParticle(mom[0],mom[1],mom[2],ketot,i,kesdtrack->GetLabel(),kncl,kpt,kphi,keta);
d7c6ab14 174
175 } // loop over tracks
176
177 return kTRUE;
178}
179
180/**********************************************************/
181
182void AliJetParticlesReaderESD::Rewind()
183{
184 //rewinds reading
185
186 if(fFile) delete fFile;
187 if(fKeyIterator) delete fKeyIterator;
188 fKeyIterator = 0;
189 fFile = 0;
190 fCurrentDir = 0;
191 fNEventsRead = 0;
192}
193
194/**********************************************************/
195
d9a296b1 196Int_t AliJetParticlesReaderESD::ReadNext()
197{
198 //reads next event from fFile
199
200 do // is OK even if 0 dirs specified,
201 { // in that case we try to read from "./"
202 if (fFile == 0)
203 {
204 fFile = OpenFile(fCurrentDir);
205 if (fFile == 0)
206 {
207 Error("ReadNext","Can't get fFile for dir no. %d",fCurrentDir);
208 fCurrentDir++;
209 continue;
210 }
211
212 fCurrentEvent = 0;
213 //fFile->GetListOfKeys()->Print();
214
215 if(fTree) delete fTree;
216 fTree = dynamic_cast<TTree*>(fFile->Get("esdTree"));
217 if(fTree)
218 fTree->SetBranchAddress("ESD",&fESD);
219 else
220 fKeyIterator = new TIter(fFile->GetListOfKeys());
221 }
222
223 if(fTree)
224 {
225 if(AliKalmanTrack::GetConvConst()<=0.)
226 AliKalmanTrack::SetMagneticField(0.5);
227 if(fCurrentEvent>=fTree->GetEntries())
228 {
229 fCurrentDir++;
230 delete fTree;
231 fTree = 0;
232 delete fFile;
233 fFile = 0;
234 continue;
235 }
236 fTree->GetEvent(fCurrentEvent);
237 }
238 else
239 { // "old" way via ESD objects stored in root file
240 TKey* key = (TKey*)fKeyIterator->Next();
241 if (key == 0)
242 {
243 fCurrentDir++;
244 delete fKeyIterator;
245 fKeyIterator = 0;
246 delete fFile; //we have to assume there are no more ESD objects in the fFile
247 fFile = 0;
248 continue;
249 }
250 TString esdname = "ESD";
251 esdname+=fCurrentEvent;
252 if(fESD) delete fESD;
253 fESD = dynamic_cast<AliESD*>(fFile->Get(esdname));
254 if (fESD == 0)
255 {
256 Info("ReadNext","Can't find AliESD object named %s",esdname.Data());
257 fCurrentDir++;
258 delete fKeyIterator;
259 fKeyIterator = 0;
260 delete fFile;//we have to assume there is no more ESD objects in the fFile
261 fFile = 0;
262 continue;
263 }
264 }
265 ReadESD(fESD);
266 fCurrentEvent++;
267 fNEventsRead++;
268 return kTRUE;//success -> read one event
269 } while(fCurrentDir < GetNumberOfDirs());
270 //end of loop over directories specified in fDirs Obj Array
271 return kFALSE; //no more directories to read
272}
273
274/**********************************************************/
275
d7c6ab14 276TFile* AliJetParticlesReaderESD::OpenFile(Int_t n)
277{
278 //opens fFile with kine tree
279
280 const TString& dirname = GetDirName(n);
281 if (dirname == "")
282 {
04a02430 283 Error("OpenFiles","Can't get directory name");
d7c6ab14 284 return 0;
285 }
286 TString filename = dirname +"/"+ fESDFileName;
287 TFile *ret = TFile::Open(filename.Data());
288 if (ret == 0)
289 {
290 Error("OpenFiles","Can't open fFile %s",filename.Data());
291 return 0;
292 }
293 if (!ret->IsOpen())
294 {
295 Error("OpenFiles","Can't open fFile %s",filename.Data());
296 return 0;
297 }
298
299 return ret;
300}