[u/mrichter/AliRoot.git] / HBTAN / AliHBTReaderESD.cxx

#include "AliHBTReaderESD.h"
//____________________________________________________________________
//////////////////////////////////////////////////////////////////////
//                                                                  //
// class AliHBTReaderESD                                            //
//                                                                  //
// reader for ALICE Event Summary Data (ESD).                       //
//                                                                  //
// Piotr.Skowronski@cern.ch                                         //
//                                                                  //
//////////////////////////////////////////////////////////////////////

#include <TPDGCode.h>
#include <TString.h>
#include <TObjString.h>
#include <TTree.h>
#include <TFile.h>
#include <TParticle.h>

#include <AliRunLoader.h>
#include <AliStack.h>
#include <AliESDtrack.h>
#include <AliESD.h>

#include "AliHBTRun.h"
#include "AliHBTEvent.h"
#include "AliHBTParticle.h"
#include "AliHBTParticleCut.h"

ClassImp(AliHBTReaderESD)

AliHBTReaderESD::AliHBTReaderESD(const Char_t* esdfilename, const Char_t* galfilename):
 fESDFileName(esdfilename),
 fGAlFileName(galfilename),
 fFile(0x0),
 fRunLoader(0x0),
 fReadParticles(kFALSE)
{
  //cosntructor
  if ( ((Int_t)kNSpecies) != ((Int_t)AliESDtrack::kSPECIES))
    Fatal("AliHBTReaderESD","ESD defintions probobly changed. Ask Youra.");
}
/********************************************************************/
  
AliHBTReaderESD::AliHBTReaderESD(TObjArray* dirs,const Char_t* esdfilename, const Char_t* galfilename):
 AliHBTReader(dirs), 
 fESDFileName(esdfilename),
 fGAlFileName(galfilename),
 fFile(0x0),
 fRunLoader(0x0),
 fReadParticles(kFALSE)
{
  //cosntructor
  if ( ((Int_t)kNSpecies) != ((Int_t)AliESDtrack::kSPECIES))
    Fatal("AliHBTReaderESD","ESD defintions probobly changed. Ask Youra.");
}
/********************************************************************/

AliHBTReaderESD::~AliHBTReaderESD()
{
 //desctructor
  delete fRunLoader;
  delete fFile;
}
/**********************************************************/
Int_t AliHBTReaderESD::ReadNext()
{
//reads next event from fFile
  
  //****** Tentative particle type "concentrations"
  static const Double_t concentr[5]={0.05, 0., 0.85, 0.10, 0.05};
  
  Double_t pidtable[kNSpecies];//array used for reading pid probabilities from ESD track
  Double_t w[kNSpecies];
  Double_t mom[3];//momentum
  Double_t pos[3];//position
  
  if (AliHBTParticle::fgDebug)
    Info("ReadNext","Entered");
    
  TDatabasePDG* pdgdb = TDatabasePDG::Instance();
  if (pdgdb == 0x0)
   {
     Error("Next","Can not get PDG Database Instance.");
     return 1;
   }
  
  if (fParticlesEvent == 0x0)  fParticlesEvent = new AliHBTEvent();
  if (fTracksEvent == 0x0)  fTracksEvent = new AliHBTEvent();
  
  fParticlesEvent->Reset();
  fTracksEvent->Reset();
        
  do  //do{}while; is OK even if 0 dirs specified. In that case we try to read from "./"
   {
     if (fFile == 0x0)
      {
       fFile = OpenFile(fCurrentDir);//rl is opened here
       if (fFile == 0x0)
         {
           Error("ReadNext","Cannot get fFile for dir no. %d",fCurrentDir);
           fCurrentDir++;
           continue;
         }
       fCurrentEvent = 0;
      } 
      
     //try to read
     TString esdname;
     esdname+=fCurrentEvent;
     AliESD* esd = dynamic_cast<AliESD*>(fFile->Get(esdname));
     if (esd == 0x0)
      {
        if (AliHBTParticle::fgDebug > 2 )
          {
            Info("ReadNext","Can not find ESD object named %s.",esdname.Data());
          }
        fCurrentDir++;
        delete fFile;//we have to assume there is no more ESD objects in the fFile
        delete fRunLoader;
        fFile = 0x0;
        fRunLoader = 0x0;
        continue;
      }
     AliStack* stack = 0x0;
     if (fReadParticles && fRunLoader)
      {
        fRunLoader->GetEvent(fCurrentEvent);
        stack = fRunLoader->Stack();
      }
     Info("ReadNext","Reading Event %d",fCurrentEvent);
  
     Int_t ntr = esd->GetNumberOfTracks();
     Info("ReadNext","Found %d tracks.",ntr);
     for (Int_t i = 0;i<ntr; i++)
      {
        AliESDtrack *esdtrack = esd->GetTrack(i);
        if (esdtrack == 0x0)
         {
           Error("Next","Can not get track %d", i);
           continue;
         }
        
        if (esdtrack->HasVertexParameters() == kFALSE)
         {
           if (AliHBTParticle::fgDebug > 2) 
             Info("ReadNext","Particle skipped: Data at vertex not available.");
           continue;
         }
         
        if ((esdtrack->GetStatus()&AliESDtrack::kESDpid) == kFALSE) 
         {
           if (AliHBTParticle::fgDebug > 2) 
             Info("ReadNext","Particle skipped: PID BIT is not set.");
           continue;
         }
       
        esdtrack->GetESDpid(pidtable);
        esdtrack->GetVertexPxPyPz(mom[0],mom[1],mom[2]);
        esdtrack->GetVertexXYZ(pos[0],pos[1],pos[2]);
        
        Double_t extx;
        Double_t extp[5];
        esdtrack->GetExternalParameters(extx,extp);
        
        Int_t charge = (extp[4] > 0)?-1:1;//if curvature=-charg/Pt is positive charge is negative
        
        //Particle from kinematics
        AliHBTParticle* particle = 0;
        Bool_t keeppart = kFALSE;
        if ( fReadParticles && stack  )
         {
           if (esdtrack->GetLabel() < 0) continue;//this is fake -  we are not able to match any track 
           TParticle *p = stack->Particle(esdtrack->GetLabel());
           if (p==0x0) 
            {
              Error("ReadNext","Can not find track with such label.");
              continue;
            }
//           if(p->GetPdgCode()<0) charge = -1;
           particle = new AliHBTParticle(*p,i);
           
         }
         
        //Here we apply Bayes' formula
        Double_t rc=0.;
        for (Int_t s=0; s<AliESDtrack::kSPECIES; s++) rc+=concentr[s]*pidtable[s];
        if (rc==0.0) 
         {
           if (AliHBTParticle::fgDebug > 2) 
             Info("ReadNext","Particle rejected since total bayessian PID probab. is zero.");
           continue;
         }

        for (Int_t s=0; s<AliESDtrack::kSPECIES; s++) w[s]=concentr[s]*pidtable[s]/rc;

        if (AliHBTParticle::fgDebug > 4)
         { 
           Info("ReadNext","###########################################################################");
           Info("ReadNext","Momentum: %f %f %f",mom[0],mom[1],mom[2]);
           Info("ReadNext","Position: %f %f %f",pos[0],pos[1],pos[2]);
           TString msg("Pid list got from track:");
           for (Int_t s = 0;s<kNSpecies;s++)
            {
              msg+="\n    ";
              msg+=s;
              msg+="(";
              msg+=charge*GetSpeciesPdgCode((ESpecies)s);
              msg+="): ";
              msg+=w[s];
              msg+=" (";
              msg+=pidtable[s];
              msg+=")";
            }
           Info("ReadNext","%s",msg.Data());
         }//if (AliHBTParticle::fgDebug>4)

        for (Int_t s = 0; s<kNSpecies; s++)
         {
           Float_t pp = w[s];
           if (pp == 0.0) continue;

           Int_t pdgcode = charge*GetSpeciesPdgCode((ESpecies)s);
           if(Pass(pdgcode)) continue; //check if we are intersted with particles of this type 

           Double_t mass = pdgdb->GetParticle(pdgcode)->Mass();
           Double_t tEtot = TMath::Sqrt( mom[0]*mom[0] + mom[1]*mom[1] + mom[2]*mom[2] + mass*mass);//total energy of the track

           AliHBTParticle* track = new AliHBTParticle(pdgcode, w[s],i, 
                                                      mom[0], mom[1], mom[2], tEtot,
                                                      pos[0], pos[1], pos[2], 0.);
           //copy probabilitis of other species (if not zero)
           for (Int_t k = 0; k<kNSpecies; k++)
            {
              if (k == s) continue;
              if (w[k] == 0.0) continue;
              track->SetPIDprobability(charge*GetSpeciesPdgCode( (ESpecies)k ),w[k]);
            }
           if(Pass(track))//check if meets all criteria of any of our cuts
                          //if it does not delete it and take next good track
            { 
              delete track;
              continue;
            }
           
           fTracksEvent->AddParticle(track);
           if (particle) fParticlesEvent->AddParticle(particle);
           keeppart = kTRUE;
               
           if (AliHBTParticle::fgDebug > 4 )
            {
              Info("ReadNext","\n\nAdding Particle with incarnation %d",pdgcode);
              track->Print();
            }
         }//for (Int_t s = 0; s<kNSpecies; s++)
         
        if (keeppart == kFALSE) delete particle;//particle was not stored in event
        
      }//for (Int_t i = 0;i<ntr; i++)  -- loop over tracks
     
     Info("ReadNext","Read %d tracks and %d particles from event %d (event %d in dir %d).",
            fTracksEvent->GetNumberOfParticles(), fParticlesEvent->GetNumberOfParticles(),
            fNEventsRead,fCurrentEvent,fCurrentDir);
      
     fCurrentEvent++;
     fNEventsRead++;
     delete esd;
     return 0;//success -> read one event
   }while(fCurrentDir < GetNumberOfDirs());//end of loop over directories specified in fDirs Obj Array  
   
  return 1; //no more directories to read
}
/**********************************************************/
void AliHBTReaderESD::Rewind()
{
  //rewinds reading 
  delete fFile;
  fFile = 0;
  delete fRunLoader;
  fCurrentDir = 0;
  fNEventsRead = 0;
  fCurrentEvent++;
}
/**********************************************************/

TFile* AliHBTReaderESD::OpenFile(Int_t n)
{
//opens fFile with kine tree

 const TString& dirname = GetDirName(n);
 if (dirname == "")
  {
   Error("OpenFiles","Can not get directory name");
   return 0x0;
  }
 TString filename = dirname +"/"+ fESDFileName;
 TFile *ret = TFile::Open(filename.Data()); 

 if ( ret == 0x0)
  {
    Error("OpenFiles","Can't open fFile %s",filename.Data());
    return 0x0;
  }
 if (!ret->IsOpen())
  {
    Error("OpenFiles","Can't open fFile  %s",filename.Data());
    return 0x0;
  }
 
 if (fReadParticles)
  {
   fRunLoader = AliRunLoader::Open(dirname +"/"+ fGAlFileName);
   if (fRunLoader == 0x0)
    {
      Error("OpenFiles","Can't get RunLoader for directory %s",dirname.Data());
      delete ret;
      return 0x0;
    }
   fRunLoader->LoadHeader();
   if (fRunLoader->LoadKinematics())
    {
      Error("Next","Error occured while loading kinematics.");
      delete fRunLoader;
      delete ret;
      return 0x0;
    }
  }
 return ret;
}
/**********************************************************/

Int_t AliHBTReaderESD::GetSpeciesPdgCode(ESpecies spec)//skowron
{
  //returns pdg code from the PID index
  //ask jura about charge
  switch (spec)
   {
     case kESDElectron:
       return kPositron;
       break;
     case kESDMuon:
       return kMuonPlus;
       break;
     case kESDPion:
       return kPiPlus;
       break;
     case kESDKaon:
       return kKPlus;
       break;
     case kESDProton:
       return kProton;
       break;
     default:
       ::Warning("GetSpeciesPdgCode","Specie with number %d is not defined.",(Int_t)spec);
       break;
   }
  return 0;
}
Commit	Line	Data
7be13e68	1	#include "AliHBTReaderESD.h"
7e35966a	2	//____________________________________________________________________
	3	//////////////////////////////////////////////////////////////////////
	4	// //
	5	// class AliHBTReaderESD //
	6	// //
	7	// reader for ALICE Event Summary Data (ESD). //
	8	// //
	9	// Piotr.Skowronski@cern.ch //
	10	// //
	11	//////////////////////////////////////////////////////////////////////
7be13e68	12
	13	#include <TPDGCode.h>
	14	#include <TString.h>
	15	#include <TObjString.h>
	16	#include <TTree.h>
	17	#include <TFile.h>
	18	#include <TParticle.h>
	19
bed069a4	20	#include <AliRunLoader.h>
bed069a4	21	#include <AliStack.h>
7be13e68	22	#include <AliESDtrack.h>
	23	#include <AliESD.h>
	24
	25	#include "AliHBTRun.h"
	26	#include "AliHBTEvent.h"
	27	#include "AliHBTParticle.h"
	28	#include "AliHBTParticleCut.h"
	29
	30	ClassImp(AliHBTReaderESD)
	31
bed069a4	32	AliHBTReaderESD::AliHBTReaderESD(const Char_t* esdfilename, const Char_t* galfilename):
7be13e68	33	fESDFileName(esdfilename),
bed069a4	34	fGAlFileName(galfilename),
	35	fFile(0x0),
	36	fRunLoader(0x0),
	37	fReadParticles(kFALSE)
7be13e68	38	{
	39	//cosntructor
	40	if ( ((Int_t)kNSpecies) != ((Int_t)AliESDtrack::kSPECIES))
	41	Fatal("AliHBTReaderESD","ESD defintions probobly changed. Ask Youra.");
	42	}
	43	/********************************************************************/
	44
bed069a4	45	AliHBTReaderESD::AliHBTReaderESD(TObjArray* dirs,const Char_t* esdfilename, const Char_t* galfilename):
7be13e68	46	AliHBTReader(dirs),
7be13e68	47	fESDFileName(esdfilename),
bed069a4	48	fGAlFileName(galfilename),
	49	fFile(0x0),
	50	fRunLoader(0x0),
	51	fReadParticles(kFALSE)
7be13e68	52	{
	53	//cosntructor
	54	if ( ((Int_t)kNSpecies) != ((Int_t)AliESDtrack::kSPECIES))
	55	Fatal("AliHBTReaderESD","ESD defintions probobly changed. Ask Youra.");
	56	}
	57	/********************************************************************/
	58
	59	AliHBTReaderESD::~AliHBTReaderESD()
	60	{
	61	//desctructor
bed069a4	62	delete fRunLoader;
7e35966a	63	delete fFile;
7be13e68	64	}
bed069a4	65	/**********************************************************/
bed069a4	66	Int_t AliHBTReaderESD::ReadNext()
7be13e68	67	{
bed069a4	68	//reads next event from fFile
	69
	70	//****** Tentative particle type "concentrations"
	71	static const Double_t concentr[5]={0.05, 0., 0.85, 0.10, 0.05};
7be13e68	72
	73	Double_t pidtable[kNSpecies];//array used for reading pid probabilities from ESD track
	74	Double_t w[kNSpecies];
	75	Double_t mom[3];//momentum
	76	Double_t pos[3];//position
7be13e68	77
bed069a4	78	if (AliHBTParticle::fgDebug)
	79	Info("ReadNext","Entered");
	80
7be13e68	81	TDatabasePDG* pdgdb = TDatabasePDG::Instance();
	82	if (pdgdb == 0x0)
	83	{
bed069a4	84	Error("Next","Can not get PDG Database Instance.");
7be13e68	85	return 1;
7be13e68	86	}
bed069a4	87
	88	if (fParticlesEvent == 0x0) fParticlesEvent = new AliHBTEvent();
	89	if (fTracksEvent == 0x0) fTracksEvent = new AliHBTEvent();
	90
	91	fParticlesEvent->Reset();
	92	fTracksEvent->Reset();
	93
7be13e68	94	do //do{}while; is OK even if 0 dirs specified. In that case we try to read from "./"
7be13e68	95	{
bed069a4	96	if (fFile == 0x0)
7be13e68	97	{
bed069a4	98	fFile = OpenFile(fCurrentDir);//rl is opened here
bed069a4	99	if (fFile == 0x0)
7be13e68	100	{
bed069a4	101	Error("ReadNext","Cannot get fFile for dir no. %d",fCurrentDir);
	102	fCurrentDir++;
	103	continue;
	104	}
	105	fCurrentEvent = 0;
	106	}
	107
	108	//try to read
	109	TString esdname;
	110	esdname+=fCurrentEvent;
	111	AliESD* esd = dynamic_cast<AliESD*>(fFile->Get(esdname));
	112	if (esd == 0x0)
	113	{
	114	if (AliHBTParticle::fgDebug > 2 )
	115	{
	116	Info("ReadNext","Can not find ESD object named %s.",esdname.Data());
	117	}
	118	fCurrentDir++;
	119	delete fFile;//we have to assume there is no more ESD objects in the fFile
	120	delete fRunLoader;
	121	fFile = 0x0;
7e35966a	122	fRunLoader = 0x0;
bed069a4	123	continue;
	124	}
	125	AliStack* stack = 0x0;
	126	if (fReadParticles && fRunLoader)
	127	{
	128	fRunLoader->GetEvent(fCurrentEvent);
	129	stack = fRunLoader->Stack();
	130	}
	131	Info("ReadNext","Reading Event %d",fCurrentEvent);
7be13e68	132
bed069a4	133	Int_t ntr = esd->GetNumberOfTracks();
	134	Info("ReadNext","Found %d tracks.",ntr);
	135	for (Int_t i = 0;i<ntr; i++)
	136	{
	137	AliESDtrack *esdtrack = esd->GetTrack(i);
	138	if (esdtrack == 0x0)
	139	{
	140	Error("Next","Can not get track %d", i);
	141	continue;
	142	}
7e35966a	143
bfb09ece	144	if (esdtrack->HasVertexParameters() == kFALSE)
7e35966a	145	{
	146	if (AliHBTParticle::fgDebug > 2)
	147	Info("ReadNext","Particle skipped: Data at vertex not available.");
	148	continue;
	149	}
	150
bed069a4	151	if ((esdtrack->GetStatus()&AliESDtrack::kESDpid) == kFALSE)
	152	{
	153	if (AliHBTParticle::fgDebug > 2)
	154	Info("ReadNext","Particle skipped: PID BIT is not set.");
	155	continue;
	156	}
7e35966a	157
bed069a4	158	esdtrack->GetESDpid(pidtable);
bfb09ece	159	esdtrack->GetVertexPxPyPz(mom[0],mom[1],mom[2]);
bfb09ece	160	esdtrack->GetVertexXYZ(pos[0],pos[1],pos[2]);
bed069a4	161
3c69895b	162	Double_t extx;
	163	Double_t extp[5];
	164	esdtrack->GetExternalParameters(extx,extp);
	165
	166	Int_t charge = (extp[4] > 0)?-1:1;//if curvature=-charg/Pt is positive charge is negative
	167
bed069a4	168	//Particle from kinematics
	169	AliHBTParticle* particle = 0;
	170	Bool_t keeppart = kFALSE;
	171	if ( fReadParticles && stack )
	172	{
	173	if (esdtrack->GetLabel() < 0) continue;//this is fake - we are not able to match any track
	174	TParticle *p = stack->Particle(esdtrack->GetLabel());
	175	if (p==0x0)
	176	{
	177	Error("ReadNext","Can not find track with such label.");
	178	continue;
	179	}
3c69895b	180	// if(p->GetPdgCode()<0) charge = -1;
bed069a4	181	particle = new AliHBTParticle(*p,i);
3c69895b	182
bed069a4	183	}
	184
	185	//Here we apply Bayes' formula
	186	Double_t rc=0.;
	187	for (Int_t s=0; s<AliESDtrack::kSPECIES; s++) rc+=concentr[s]*pidtable[s];
	188	if (rc==0.0)
	189	{
	190	if (AliHBTParticle::fgDebug > 2)
	191	Info("ReadNext","Particle rejected since total bayessian PID probab. is zero.");
	192	continue;
	193	}
7be13e68	194
bed069a4	195	for (Int_t s=0; s<AliESDtrack::kSPECIES; s++) w[s]=concentr[s]*pidtable[s]/rc;
7be13e68	196
bed069a4	197	if (AliHBTParticle::fgDebug > 4)
	198	{
	199	Info("ReadNext","###########################################################################");
	200	Info("ReadNext","Momentum: %f %f %f",mom[0],mom[1],mom[2]);
	201	Info("ReadNext","Position: %f %f %f",pos[0],pos[1],pos[2]);
	202	TString msg("Pid list got from track:");
	203	for (Int_t s = 0;s<kNSpecies;s++)
	204	{
	205	msg+="\n ";
	206	msg+=s;
	207	msg+="(";
3c69895b	208	msg+=charge*GetSpeciesPdgCode((ESpecies)s);
bed069a4	209	msg+="): ";
	210	msg+=w[s];
	211	msg+=" (";
	212	msg+=pidtable[s];
	213	msg+=")";
	214	}
	215	Info("ReadNext","%s",msg.Data());
	216	}//if (AliHBTParticle::fgDebug>4)
7be13e68	217
bed069a4	218	for (Int_t s = 0; s<kNSpecies; s++)
bed069a4	219	{
dd82cadc	220	Float_t pp = w[s];
dd82cadc	221	if (pp == 0.0) continue;
7be13e68	222
3c69895b	223	Int_t pdgcode = charge*GetSpeciesPdgCode((ESpecies)s);
bed069a4	224	if(Pass(pdgcode)) continue; //check if we are intersted with particles of this type
7be13e68	225
bed069a4	226	Double_t mass = pdgdb->GetParticle(pdgcode)->Mass();
bed069a4	227	Double_t tEtot = TMath::Sqrt( mom[0]mom[0] + mom[1]mom[1] + mom[2]mom[2] + massmass);//total energy of the track
7be13e68	228
bed069a4	229	AliHBTParticle* track = new AliHBTParticle(pdgcode, w[s],i,
	230	mom[0], mom[1], mom[2], tEtot,
	231	pos[0], pos[1], pos[2], 0.);
	232	//copy probabilitis of other species (if not zero)
	233	for (Int_t k = 0; k<kNSpecies; k++)
	234	{
	235	if (k == s) continue;
	236	if (w[k] == 0.0) continue;
3c69895b	237	track->SetPIDprobability(charge*GetSpeciesPdgCode( (ESpecies)k ),w[k]);
bed069a4	238	}
	239	if(Pass(track))//check if meets all criteria of any of our cuts
	240	//if it does not delete it and take next good track
	241	{
	242	delete track;
	243	continue;
	244	}
	245
	246	fTracksEvent->AddParticle(track);
	247	if (particle) fParticlesEvent->AddParticle(particle);
	248	keeppart = kTRUE;
	249
	250	if (AliHBTParticle::fgDebug > 4 )
	251	{
	252	Info("ReadNext","\n\nAdding Particle with incarnation %d",pdgcode);
	253	track->Print();
	254	}
	255	}//for (Int_t s = 0; s<kNSpecies; s++)
	256
	257	if (keeppart == kFALSE) delete particle;//particle was not stored in event
	258
	259	}//for (Int_t i = 0;i<ntr; i++) -- loop over tracks
	260
	261	Info("ReadNext","Read %d tracks and %d particles from event %d (event %d in dir %d).",
dd82cadc	262	fTracksEvent->GetNumberOfParticles(), fParticlesEvent->GetNumberOfParticles(),
bed069a4	263	fNEventsRead,fCurrentEvent,fCurrentDir);
7be13e68	264
bed069a4	265	fCurrentEvent++;
	266	fNEventsRead++;
	267	delete esd;
	268	return 0;//success -> read one event
	269	}while(fCurrentDir < GetNumberOfDirs());//end of loop over directories specified in fDirs Obj Array
	270
	271	return 1; //no more directories to read
	272	}
	273	/**********************************************************/
	274	void AliHBTReaderESD::Rewind()
	275	{
7e35966a	276	//rewinds reading
bed069a4	277	delete fFile;
	278	fFile = 0;
	279	delete fRunLoader;
	280	fCurrentDir = 0;
	281	fNEventsRead = 0;
	282	fCurrentEvent++;
bed069a4	283	}
7be13e68	284	/**********************************************************/
bed069a4	285
7be13e68	286	TFile* AliHBTReaderESD::OpenFile(Int_t n)
7be13e68	287	{
bed069a4	288	//opens fFile with kine tree
7be13e68	289
	290	const TString& dirname = GetDirName(n);
	291	if (dirname == "")
	292	{
	293	Error("OpenFiles","Can not get directory name");
	294	return 0x0;
	295	}
	296	TString filename = dirname +"/"+ fESDFileName;
	297	TFile *ret = TFile::Open(filename.Data());
	298
	299	if ( ret == 0x0)
	300	{
bed069a4	301	Error("OpenFiles","Can't open fFile %s",filename.Data());
7be13e68	302	return 0x0;
	303	}
	304	if (!ret->IsOpen())
	305	{
bed069a4	306	Error("OpenFiles","Can't open fFile %s",filename.Data());
7be13e68	307	return 0x0;
	308	}
	309
bed069a4	310	if (fReadParticles)
	311	{
	312	fRunLoader = AliRunLoader::Open(dirname +"/"+ fGAlFileName);
	313	if (fRunLoader == 0x0)
	314	{
	315	Error("OpenFiles","Can't get RunLoader for directory %s",dirname.Data());
	316	delete ret;
	317	return 0x0;
	318	}
	319	fRunLoader->LoadHeader();
	320	if (fRunLoader->LoadKinematics())
	321	{
	322	Error("Next","Error occured while loading kinematics.");
	323	delete fRunLoader;
	324	delete ret;
	325	return 0x0;
	326	}
	327	}
7be13e68	328	return ret;
	329	}
	330	/**********************************************************/
	331
	332	Int_t AliHBTReaderESD::GetSpeciesPdgCode(ESpecies spec)//skowron
	333	{
	334	//returns pdg code from the PID index
	335	//ask jura about charge
	336	switch (spec)
	337	{
	338	case kESDElectron:
	339	return kPositron;
	340	break;
	341	case kESDMuon:
	342	return kMuonPlus;
	343	break;
	344	case kESDPion:
	345	return kPiPlus;
	346	break;
	347	case kESDKaon:
	348	return kKPlus;
	349	break;
	350	case kESDProton:
	351	return kProton;
	352	break;
	353	default:
	354	::Warning("GetSpeciesPdgCode","Specie with number %d is not defined.",(Int_t)spec);
	355	break;
	356	}
	357	return 0;
	358	}