xAODTrackParticleRetriever.cxx

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/*
  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
*/
 
#include "xAODJiveXML/xAODTrackParticleRetriever.h"
#include "CLHEP/Units/SystemOfUnits.h"
 
#include "xAODTracking/TrackParticleContainer.h"
 
namespace JiveXML {

  xAODTrackParticleRetriever::xAODTrackParticleRetriever(const std::string& type,const std::string& name,const IInterface* parent):
    AthAlgTool(type,name,parent){}
 
 
  StatusCode xAODTrackParticleRetriever::initialize(){
    ATH_CHECK(m_keys.initialize());
    return StatusCode::SUCCESS;
  }

  StatusCode xAODTrackParticleRetriever::retrieve(ToolHandle<IFormatTool> &FormatTool) {
 
    ATH_MSG_DEBUG("In retrieve()");
 
  
    // Loop through the keys and retrieve the corresponding data
    for (const auto& key : m_keys) {
      SG::ReadHandle<xAOD::TrackParticleContainer> cont(key);
      if (cont.isValid()) {
    DataMap data = getData(&(*cont));
    if (FormatTool->AddToEvent(dataTypeName(), key.key() + "_xAOD", &data).isFailure()) {
      ATH_MSG_WARNING("Failed to add collection " << key.key());
    } else {
      ATH_MSG_DEBUG(" (" << key.key() << ") retrieved");
    }
      } else {
    ATH_MSG_WARNING("Collection " << key.key() << " not found in SG");
      }
    }
 
    return StatusCode::SUCCESS;
  }
 

  const DataMap xAODTrackParticleRetriever::getData(const xAOD::TrackParticleContainer* TrackParticleCont) {
 
    ATH_MSG_DEBUG("in getData()");
 
    DataMap DataMap;
 
    DataVect d0; d0.reserve(TrackParticleCont->size());
    DataVect z0; z0.reserve(TrackParticleCont->size());
    DataVect pt; pt.reserve(TrackParticleCont->size());
    DataVect phi0; phi0.reserve(TrackParticleCont->size());
    DataVect cotTheta; cotTheta.reserve(TrackParticleCont->size());
    DataVect label; label.reserve(TrackParticleCont->size());
    DataVect nBLayerHits; nBLayerHits.reserve(TrackParticleCont->size());
    DataVect nPixHits; nPixHits.reserve(TrackParticleCont->size());
    DataVect nSCTHits; nSCTHits.reserve(TrackParticleCont->size());
    DataVect nTRTHits; nTRTHits.reserve(TrackParticleCont->size());
 
    xAOD::TrackParticleContainer::const_iterator TrackParticleItr  = TrackParticleCont->begin();
    xAOD::TrackParticleContainer::const_iterator TrackParticleItrE = TrackParticleCont->end();
 
    int counter = 0;
    float charge = 0.;
    float myQOverP = 0.;
    double countHits = 0.;
    std::string labelStr = "unknownHits";
 
    for (; TrackParticleItr != TrackParticleItrE; ++TrackParticleItr) {
 
      ATH_MSG_VERBOSE(" TrackParticle #" << counter++ << " : d0 = "  << (*TrackParticleItr)->d0() << ", z0 = "
              << (*TrackParticleItr)->z0() << ", pt[GeV] = "  << (*TrackParticleItr)->pt()*(1./CLHEP::GeV)
              << ", phi = "  << (*TrackParticleItr)->phi()
              << ", qOverP = "  << (*TrackParticleItr)->qOverP()
              << ", abs(qOverP) = "  << fabs((*TrackParticleItr)->qOverP()));
 
      // Event/xAOD/xAODTrackingCnv/trunk/src/TrackParticleCnvAlg.cxx#L190 Info from Nick Styles
 
      uint8_t numberOfBLayerHits=0;
      uint8_t numberOfBLayerHits_tmp=0;
      if ( (*TrackParticleItr)->summaryValue(numberOfBLayerHits_tmp,xAOD::numberOfBLayerHits) ){
    numberOfBLayerHits += numberOfBLayerHits_tmp;
      }
      uint8_t numberOfPixelHits = 0;
      uint8_t numberOfPixelHits_tmp = 0;
      if ( (*TrackParticleItr)->summaryValue(numberOfPixelHits_tmp,xAOD::numberOfPixelHits)){
    numberOfPixelHits += numberOfPixelHits_tmp;
      }
      uint8_t numberOfTRTHits = 0;
      uint8_t numberOfTRTHits_tmp = 0;
      if ( (*TrackParticleItr)->summaryValue(numberOfTRTHits_tmp,xAOD::numberOfTRTHits)){
    numberOfTRTHits += numberOfTRTHits_tmp;
      }
      uint8_t numberOfSCTHits = 0;
      uint8_t numberOfSCTHits_tmp = 0;
      if ( (*TrackParticleItr)->summaryValue(numberOfSCTHits_tmp,xAOD::numberOfSCTHits)){
    numberOfSCTHits += numberOfSCTHits_tmp;
      }
      labelStr = "_PixelHits"+DataType( (double)numberOfPixelHits ).toString()
    + "_SCTHits"+DataType( (double)numberOfSCTHits ).toString()
    + "_BLayerHits"+DataType( (double)numberOfBLayerHits ).toString()
    + "_TRTHits"+DataType( (double)numberOfTRTHits ).toString() ;
 
      countHits = (double)numberOfBLayerHits + (double)numberOfPixelHits
    + (double)numberOfSCTHits + (double)numberOfTRTHits;
 
      ATH_MSG_VERBOSE(" TrackParticle #" << counter
              << " BLayer hits: " << (double)numberOfBLayerHits
              << ", Pixel hits: " << (double)numberOfPixelHits
              << ", SCT hits: " << (double)numberOfSCTHits
              << ", TRT hits: " << (double)numberOfTRTHits
              << ", Total hits: " << countHits
              << ";  Label: " << labelStr);
 
      nBLayerHits.emplace_back( DataType( (double)numberOfBLayerHits ));
      nPixHits.emplace_back( DataType( (double)numberOfPixelHits ));
      nSCTHits.emplace_back( DataType( (double)numberOfSCTHits ));
      nTRTHits.emplace_back( DataType( (double)numberOfTRTHits ));
 
      label.emplace_back( DataType( labelStr ).toString() );
      d0.emplace_back(DataType((*TrackParticleItr)->d0()/CLHEP::cm));
      z0.emplace_back(DataType((*TrackParticleItr)->z0()/CLHEP::cm));
      phi0.emplace_back(DataType((*TrackParticleItr)->phi()));
 
      // pt is always positive, get charge from qOverP
      myQOverP = (*TrackParticleItr)->qOverP() ;
      if (fabs(myQOverP) != myQOverP){
    charge = -1.;
      }else{
    charge = +1.;
      }
      pt.emplace_back(DataType(( charge*(*TrackParticleItr)->pt() )/CLHEP::GeV));
 
      if ( (*TrackParticleItr)->theta()  == 0.) {
    cotTheta.emplace_back(DataType(9999.));
      } else {
    cotTheta.emplace_back(DataType(1./tan((*TrackParticleItr)->theta())));
      }
    } // end TrackParticleIterator
 
      // four-vectors
    DataMap["d0"] = d0;
    DataMap["z0"] = z0;
    DataMap["pt"] = pt;
    DataMap["phi0"] = phi0;
    DataMap["cotTheta"] = cotTheta;
    DataMap["label"] = label;
    DataMap["nBLayerHits"] = nBLayerHits;
    DataMap["nPixHits"] = nPixHits;
    DataMap["nSCTHits"] = nSCTHits;
    DataMap["nTRTHits"] = nTRTHits;
 
    ATH_MSG_DEBUG(dataTypeName() << " retrieved with " << d0.size() << " entries");
 
    //All collections retrieved okay
    return DataMap;
 
  }
 
 
} // JiveXML namespace