Updates for the splines of LHC12a/b pass1.

[u/mrichter/AliRoot.git] / STEER / STEERBase / AliDetectorPID.cxx

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 * Author: The ALICE Off-line Project.                                    *
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 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/


///////////////////////////////////////////////////////////////////////////
//                       Detector PID                                    //
//                                                                       //
//                                                                       //
/*

This class is supposed to store the detector pid values for all detectors
  and all particle species.
It is meant to be used to buffer the PID values as a transient object in
  AliESDtrack and AliAODTrack, respectively.
The calculation filling and association to the track is done in
  AliAnalysisTaskPID response.
The idea of this object is to save computing time in an analysis train with
  many analyses where access to pid is done often



*/
//                                                                       //
///////////////////////////////////////////////////////////////////////////

#include "AliPIDValues.h"

#include "AliDetectorPID.h"

ClassImp(AliDetectorPID)


AliDetectorPID::AliDetectorPID() :
  TObject(),
  fArrNsigmas("AliPIDValues",AliPIDResponse::kNdetectors),
  fArrRawProbabilities("AliPIDValues",AliPIDResponse::kNdetectors)
{
  //
  // default constructor
  //
  
}

//_______________________________________________________________________
AliDetectorPID::AliDetectorPID(const AliDetectorPID &pid) :
  TObject(pid),
  fArrNsigmas(pid.fArrNsigmas),
  fArrRawProbabilities(pid.fArrRawProbabilities)
{
  //
  // copy constructor
  //
  
}

//_______________________________________________________________________
AliDetectorPID::~AliDetectorPID()
{
  //
  // destructor
  //
  fArrNsigmas.Delete();
  fArrRawProbabilities.Delete();
}

//_______________________________________________________________________
AliDetectorPID& AliDetectorPID::operator= (const AliDetectorPID &pid)
{
  //
  // assignment operator
  //
  
  if (this==&pid) return *this;

  TObject::operator=(pid);
  
  fArrNsigmas.Clear();
  fArrRawProbabilities.Clear();
  
  AliPIDValues *val=0x0;
  for (Int_t idet=0; idet<(Int_t)AliPIDResponse::kNdetectors; ++idet){
    val=static_cast<AliPIDValues*>(pid.fArrNsigmas.UncheckedAt(idet));
    if (val) new (fArrNsigmas[idet]) AliPIDValues(*val);

    val=static_cast<AliPIDValues*>(pid.fArrRawProbabilities.UncheckedAt(idet));
    if (val) new (fArrRawProbabilities[idet]) AliPIDValues(*val);
  }

  return *this;
}

//_______________________________________________________________________
void AliDetectorPID::SetRawProbability(AliPIDResponse::EDetector det, const Double_t prob[],
                                       Int_t nspecies, AliPIDResponse::EDetPidStatus status)
{
  //
  // set raw probabilities for nspecies for 'det'ector
  //
  
  AliPIDValues *val=static_cast<AliPIDValues*>(fArrRawProbabilities.UncheckedAt(det));
  if (!val)
    val=new (fArrRawProbabilities[(Int_t)det]) AliPIDValues;

  val->SetValues(prob,nspecies,status);
}

//_______________________________________________________________________
void AliDetectorPID::SetNumberOfSigmas(AliPIDResponse::EDetector det, const Double_t nsig[], Int_t nspecies)
{
  //
  // set number of sigmas for nspecies for 'det'ector
  //
  
  AliPIDValues *val=static_cast<AliPIDValues*>(fArrNsigmas.UncheckedAt(det));
  if (!val)
    val=new (fArrNsigmas[(Int_t)det]) AliPIDValues;

  val->SetValues(nsig,nspecies);
}

//_______________________________________________________________________
AliPIDResponse::EDetPidStatus AliDetectorPID::GetRawProbability(AliPIDResponse::EDetector det, Double_t prob[], Int_t nspecies) const
{
  //
  // get raw probabilities for nspecies for 'det'ector
  //
  
  AliPIDValues *val=static_cast<AliPIDValues*>(fArrRawProbabilities.UncheckedAt((Int_t)det));
  if (!val) {
    for (Int_t i=0; i<nspecies; ++i) prob[i]=1.; //TODO: Is '1' the correct values or better 1/nspecies
    return AliPIDResponse::kDetNoSignal;
  }

  return val->GetValues(prob,nspecies);
}

//_______________________________________________________________________
void AliDetectorPID::GetNumberOfSigmas(AliPIDResponse::EDetector det, Double_t nsig[], Int_t nspecies) const
{
  //
  // get number of sigmas for nspecies for detector 'det'
  //
  
  AliPIDValues *val=static_cast<AliPIDValues*>(fArrNsigmas.UncheckedAt((Int_t)det));
  if (!val) {
    for (Int_t i=0; i<nspecies; ++i) nsig[i]=-999.;
    return;
  }

  val->GetValues(nsig,nspecies);
}

//_______________________________________________________________________
Double_t AliDetectorPID::GetRawProbability(AliPIDResponse::EDetector det, AliPID::EParticleType type) const
{
  //
  // get 'det'ector raw probability for particle 'type'
  //
  
  AliPIDValues *val=static_cast<AliPIDValues*>(fArrRawProbabilities.UncheckedAt((Int_t)det));
  if (!val) {
    return 0.; //TODO: Is '0' the correct value?
  }
  
  return val->GetValue(type);
}

//_______________________________________________________________________
Double_t AliDetectorPID::GetNumberOfSigmas(AliPIDResponse::EDetector det, AliPID::EParticleType type) const
{
  //
  // get 'det'ector number of sigmas for particle 'type'
  //
  AliPIDValues *val=static_cast<AliPIDValues*>(fArrNsigmas.UncheckedAt((Int_t)det));
  if (!val) {
    return -999.; //TODO: Is '-999.' the correct value?
  }
  
  return val->GetValue(type);
}