Analysis taks for the generation of AOD with muon events (Roberta, Enrico)

[u/mrichter/AliRoot.git] / PWG3 / muon / AliAnalysisTaskESDMuonFilter.cxx

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 * Author: The ALICE Off-line Project.                                    *
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 * provided "as is" without express or implied warranty.                  *
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// Add the muon tracks to the generic AOD track branch during the 
// filtering of the ESD - R. Arnaldi 5/5/08

#include <TChain.h>
#include <TFile.h>

#include "AliAnalysisTaskESDMuonFilter.h"
#include "AliAnalysisManager.h"
#include "AliESDEvent.h"
#include "AliAODEvent.h"
#include "AliESDInputHandler.h"
#include "AliAODHandler.h"
#include "AliAnalysisFilter.h"
#include "AliESDtrack.h"
#include "AliESDMuonTrack.h"
#include "AliESDVertex.h"
#include "AliMultiplicity.h"
#include "AliLog.h"

ClassImp(AliAnalysisTaskESDMuonFilter)

////////////////////////////////////////////////////////////////////////

AliAnalysisTaskESDMuonFilter::AliAnalysisTaskESDMuonFilter():
  AliAnalysisTaskSE(),
  fTrackFilter(0x0)
{
  // Default constructor
}

AliAnalysisTaskESDMuonFilter::AliAnalysisTaskESDMuonFilter(const char* name):
  AliAnalysisTaskSE(name),
  fTrackFilter(0x0)
{
  // Constructor
}

void AliAnalysisTaskESDMuonFilter::UserCreateOutputObjects()
{
  // Create the output container
  if (fTrackFilter) OutputTree()->GetUserInfo()->Add(fTrackFilter);
}

void AliAnalysisTaskESDMuonFilter::Init()
{
  // Initialization
  if (fDebug > 1) AliInfo("Init() \n");
}


void AliAnalysisTaskESDMuonFilter::UserExec(Option_t */*option*/)
{
  // Execute analysis for current event					    
  Long64_t ientry = Entry();
  printf("Muon Filter: Analysing event # %5d\n", (Int_t) ientry);
  
  ConvertESDtoAOD();
}

void AliAnalysisTaskESDMuonFilter::ConvertESDtoAOD() 
{
  // ESD Muon Filter analysis task executed for each event
  AliESDEvent* esd = dynamic_cast<AliESDEvent*>(InputEvent());
  
  // Define arrays for muons
  Double_t pos[3];
  Double_t p[3];
  Double_t pid[10];
  
  // has to be changed once the muon pid is provided by the ESD
  for (Int_t i = 0; i < 10; pid[i++] = 0.);
  pid[AliAODTrack::kMuon]=1.;
  
  AliAODHeader* header = AODEvent()->GetHeader();
  AliAODTrack *aodTrack = 0x0;
  AliESDMuonTrack *esdMuTrack = 0x0;
  
  // Access to the AOD container of tracks
  TClonesArray &tracks = *(AODEvent()->GetTracks());
  Int_t jTracks = header->GetRefMultiplicity();
  
  // Read primary vertex from AOD event 
  AliAODVertex *primary = AODEvent()->GetPrimaryVertex();
  primary->Print();
  
  // Loop on muon tracks to fill the AOD track branch
  Int_t nMuTracks = esd->GetNumberOfMuonTracks();
  printf("Number of Muon Tracks=%d\n",nMuTracks);
  
  // Update number of positive and negative tracks from AOD event (M.G.)
  Int_t nPosTracks = header->GetRefMultiplicityPos();
  Int_t nNegTracks = header->GetRefMultiplicityNeg();
  
  for (Int_t nMuTrack = 0; nMuTrack < nMuTracks; ++nMuTrack) {
    esdMuTrack = esd->GetMuonTrack(nMuTrack);
    
    if (!esdMuTrack->ContainTrackerData()) continue;
           
    UInt_t selectInfo = 0;
    // Track selection
    if (fTrackFilter) {
     	selectInfo = fTrackFilter->IsSelected(esdMuTrack);
     	if (!selectInfo) {
     	  continue;
     	}  
     }

    p[0] = esdMuTrack->Px(); 
    p[1] = esdMuTrack->Py(); 
    p[2] = esdMuTrack->Pz();
    
    pos[0] = esdMuTrack->GetNonBendingCoor(); 
    pos[1] = esdMuTrack->GetBendingCoor(); 
    pos[2] = esdMuTrack->GetZ();
    
    aodTrack = new(tracks[jTracks++]) AliAODTrack(esdMuTrack->GetUniqueID(), // ID
						  0, // label
						  p, // momentum
						  kTRUE, // cartesian coordinate system
						  pos, // position
						  kFALSE, // isDCA
						  0x0, // covariance matrix
						  esdMuTrack->Charge(), // charge
						  0, // ITSClusterMap
						  pid, // pid
						  primary, // primary vertex
						  kFALSE, // used for vertex fit?
						  kFALSE, // used for primary vertex fit?
						  AliAODTrack::kPrimary,// track type
						  selectInfo); 
    
    aodTrack->SetXYAtDCA(esdMuTrack->GetNonBendingCoorAtDCA(), esdMuTrack->GetBendingCoorAtDCA());
    aodTrack->SetPxPyPzAtDCA(esdMuTrack->PxAtDCA(), esdMuTrack->PyAtDCA(), esdMuTrack->PzAtDCA());
    aodTrack->ConvertAliPIDtoAODPID();
    aodTrack->SetChi2perNDF(esdMuTrack->GetChi2() / (2.*esdMuTrack->GetNHit() - 5.));
    aodTrack->SetChi2MatchTrigger(esdMuTrack->GetChi2MatchTrigger());
    aodTrack->SetHitsPatternInTrigCh(esdMuTrack->GetHitsPatternInTrigCh());
    aodTrack->SetMuonClusterMap(esdMuTrack->GetMuonClusterMap());
    aodTrack->SetMatchTrigger(esdMuTrack->GetMatchTrigger());
    
    primary->AddDaughter(aodTrack);
    
    if (esdMuTrack->Charge() > 0) nPosTracks++;
    else nNegTracks++;
  }
  
  header->SetRefMultiplicity(jTracks); 
  header->SetRefMultiplicityPos(nPosTracks);
  header->SetRefMultiplicityNeg(nNegTracks);
}

void AliAnalysisTaskESDMuonFilter::Terminate(Option_t */*option*/)
{
  // Terminate analysis
  //
  if (fDebug > 1) printf("AnalysisESDfilter: Terminate() \n");
}