TrackCaloClusterRecValidationTool.cxx

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
#include "TrackCaloClusterRecValidationTool.h"
//
#include "GaudiKernel/SystemOfUnits.h"
#include "xAODJet/JetContainer.h"
#include "xAODTruth/TruthParticle.h"
 
#include "xAODCaloEvent/CaloClusterContainer.h"
#include "xAODCore/ShallowCopy.h"
#include "xAODPFlow/TrackCaloClusterContainer.h"
#include "xAODParticleEvent/IParticleLink.h"
#include "AthContainers/CurrentContext.h"
 
#include "JetCalibTools/JetCalibrationTool.h"
 
#include "TCCPlots.h"
//
#include <algorithm>
#include <cmath>   // to get std::isnan(), std::abs etc.
#include <cstdlib> // to getenv
#include <limits>
#include <utility>
#include <vector>

TrackCaloClusterRecValidationTool::TrackCaloClusterRecValidationTool(const std::string& type,
                                                                     const std::string& name,
                                                                     const IInterface* parent)
  : ManagedMonitorToolBase(type, name, parent)
  , m_jetCalibrationTools()
{
  declareProperty("JetCalibrationTools", m_jetCalibrationTools);
  declareProperty("ApplyCalibration", m_applyCalibration = false);
  declareProperty("CollectionsToCalibrate", m_jetCalibrationCollections);
  declareProperty("SaveJetInfo", m_saveJetInfo = true);
  declareProperty("JetTruthContainerName", m_truthJetContainerName);
  declareProperty("JetTruthTrimmedContainerName", m_truthTrimmedJetContainerName);
  declareProperty("JetContainerNames", m_jetContainerNames);
  declareProperty("PrimaryVertexContainerName", m_vertexContainerName = "PrimaryVertices");
  declareProperty("TopoJetReferenceName", m_topoJetReferenceName = "AntiKt10LCTopoJets");
  declareProperty("TopoTrimmedJetReferenceName", m_topoTrimmedJetReferenceName = "AntiKt10LCTopoTrimmedJets");
  declareProperty("maxTrkJetDR", m_maxJetDR = 0.75);
  declareProperty("maxEta", m_maxEta = 2.0);
  declareProperty("minPt", m_minPt = 200 * Gaudi::Units::GeV);
  declareProperty("minMass", m_minMass = 50. * Gaudi::Units::GeV);
  declareProperty("maxMass", m_maxMass = 150. * Gaudi::Units::GeV);
  declareProperty("DirName", m_dirName = "TCCValidation/");
  declareProperty("SubFolder", m_folder);
  declareProperty("SaveTrackInfo", m_saveTrackInfo = false);
  declareProperty("SaveMatchingInfo", m_saveMatchingInfo = false);
  declareProperty("TrackCollectionName", m_trackParticleCollectionName = "InDetTrackParticles");
  declareProperty("TrackPtMin", m_trackPtMin = 20. * Gaudi::Units::GeV);
  declareProperty("JetPtBins", m_jetPtBins);
  declareProperty("JetMassOverPtBins", m_jetMassOverPtBins);
  declareProperty("TrackPtBins", m_trackPtBins);
  declareProperty("TrackProdRadiusBins", m_trackProdRadiusBins);
  declareProperty("SaveClusterInfo", m_saveClusterInfo = false);
  declareProperty("ClusterCollectionName", m_caloClusterCollectionName = "TimedCaloCalTopoClusters");
  declareProperty("ClusterEtaMax", m_caloClusterEtaMax = 2.5);
  declareProperty("SaveTrackCaloClusterInfo", m_saveTCCInfo = false);
  declareProperty("TCCCombinedCollectionNames", m_TCCCombinedCollectionNames);
  declareProperty("TCCptMin", m_tccPtMin = 10. * Gaudi::Units::GeV);
  declareProperty("TCCetaMax", m_tccEtaMax = 2.5);
}
 
TrackCaloClusterRecValidationTool::~TrackCaloClusterRecValidationTool() = default;
 
StatusCode
TrackCaloClusterRecValidationTool::initialize()
{
  ATH_MSG_DEBUG("Initializing " << name() << "...");
  ATH_CHECK(ManagedMonitorToolBase::initialize());
 
  // retrieve the jet calibration tool
  if (m_applyCalibration) {
    if (m_jetCalibrationCollections.size() != m_jetCalibrationTools.size()) {
      ATH_MSG_WARNING("Number of collections to calibrate differs from the number of calibration tools... switching "
                      "off calibration!");
      m_applyCalibration = false;
    }
    CHECK(m_jetCalibrationTools.retrieve());
  }
  const std::string jetStr{"jets"};
  const std::string trackStr{"tracks"};
  const std::string clusterStr{"clusters"};
  const std::string tccStr{"tccs"};
  if (m_saveJetInfo) {
    for (const auto& name : m_jetContainerNames) {
      ATH_MSG_INFO("Saving Plots for " << name << "...");
      std::string myname = name;
      if (name.find("AntiKt10LCTopo") != std::string::npos and name.find("My") == std::string::npos)
        myname = "My" + name;
 
      if (name == "AntiKt10TrackCaloClustersChargedJets")
        myname = "AntiKt10TrackCaloClustersCombinedJets";
      if (name == "AntiKt10TrackCaloClustersChargedTrimmedJets")
        myname = "AntiKt10TrackCaloClustersCombinedTrimmedJets";
 
      m_tccPlots.insert(std::pair<std::string, TCCPlots*>(name, new TCCPlots(nullptr, m_dirName + myname, jetStr)));
      m_tccPlots.at(name)->setJetPtBinning(m_jetPtBins);
      m_tccPlots.at(name)->setJetMassOverPtBinning(m_jetMassOverPtBins);
    }
  }
 
  if (m_saveTrackInfo) {
    ATH_MSG_INFO("Saving Plots for " << m_trackParticleCollectionName << "...");
    m_tccPlots.insert(std::pair<std::string, TCCPlots*>(
      m_trackParticleCollectionName, new TCCPlots(nullptr, m_dirName + m_trackParticleCollectionName, trackStr)));
    m_tccPlots.at(m_trackParticleCollectionName)->setTrackPtBinning(m_trackPtBins);
    m_tccPlots.at(m_trackParticleCollectionName)->setTrackProdRadiusBinning(m_trackProdRadiusBins);
  }
 
  if (m_saveClusterInfo) {
    ATH_MSG_INFO("Saving Plots for " << m_caloClusterCollectionName << "...");
    m_tccPlots.insert(std::pair<std::string, TCCPlots*>(
      m_caloClusterCollectionName, new TCCPlots(nullptr, m_dirName + m_caloClusterCollectionName, clusterStr)));
  }
 
  if (m_saveTCCInfo) {
    for (const auto& name : m_TCCCombinedCollectionNames) {
      ATH_MSG_INFO("Saving Plots for " << name << "...");
      m_tccPlots.insert(std::pair<std::string, TCCPlots*>(name, new TCCPlots(nullptr, m_dirName + name, tccStr)));
      m_tccPlots.at(name)->setTrackPtBinning(m_trackPtBins);
    }
  }
 
  ATH_CHECK(m_evt.initialize());
 
  return StatusCode::SUCCESS;
}
 
StatusCode
TrackCaloClusterRecValidationTool::fillHistograms(const EventContext& ctx)
{
  SG::ReadHandle<xAOD::EventInfo> evt(m_evt, ctx);
  if (!evt.isValid()) {
    ATH_MSG_FATAL("Unable to retrieve Event Info");
  }
  float mcEventWeight = evt->mcEventWeight();
 
  if (m_saveJetInfo) {
    ATH_MSG_DEBUG("Filling hists " << name() << "...");
 
    const auto *const vertices = getContainer<xAOD::VertexContainer>(m_vertexContainerName);
 
    // retrieve jet container
    for (const auto& name : m_jetContainerNames) {
 
      m_tccPlots.at(name)->setEventWeight(mcEventWeight);
      ATH_MSG_DEBUG("Using Container " << name << "...");
      ATH_MSG_DEBUG("-- weight = " << mcEventWeight << "...");
 
      const auto *const jets_beforeCalib = getContainer<xAOD::JetContainer>(name);
      if (not jets_beforeCalib) {
        return StatusCode::FAILURE;
      }
 
      const xAOD::JetContainer* jets = jets_beforeCalib;
 
      if (m_applyCalibration and
          std::find(m_jetCalibrationCollections.begin(), m_jetCalibrationCollections.end(), name) !=
            m_jetCalibrationCollections.end()) {
        jets = calibrateAndRecordShallowCopyJetCollection(jets_beforeCalib, name, ctx);
        if (!jets) {
          ATH_MSG_WARNING("Unable to create calibrated jet shallow copy container");
          return StatusCode::SUCCESS;
        }
      }
 
      // Getting the collections for the pseudo response
      const auto *const caloclusters = (name.find("Trimmed") == std::string::npos)
                                  ? getContainer<xAOD::JetContainer>(m_topoJetReferenceName)
                                  : getContainer<xAOD::JetContainer>(m_topoTrimmedJetReferenceName);
      const auto *const truths = (name.find("Trimmed") == std::string::npos)
                            ? getContainer<xAOD::JetContainer>(m_truthJetContainerName)
                            : getContainer<xAOD::JetContainer>(m_truthTrimmedJetContainerName);
 
      if (not truths) {
        return StatusCode::FAILURE;
      }
 
      if (not caloclusters) {
        return StatusCode::FAILURE;
      }
 
      m_tccPlots.at(name)->fill(*jets);
 
      for (const auto jet : *jets) {
        // conditions to be satisfied to select jets
        if (fabs(jet->eta()) > m_maxEta)
          continue;
 
        // get the truth matched
        const xAOD::Jet* truth_matched_nocuts = ClusterMatched(jet, truths);
        // if truth_matched exists, fill the response w/o pt and mass cuts
        if (truth_matched_nocuts)
          m_tccPlots.at(name)->fillResponseNoPtNoMassCuts(*jet, *truth_matched_nocuts);
 
        if (fabs(jet->pt()) < m_minPt)
          continue;
 
        // fill all jets histograms
        m_tccPlots.at(name)->fill(*jet);
        m_tccPlots.at(name)->fillMoments(*jet);
 
        // fill all jets histograms + truth
        for (const auto truth : *truths)
          m_tccPlots.at(name)->fill(*jet, *truth);
 
        // get the truth matched
        const xAOD::Jet* truth_matched = ClusterMatched(jet, truths);
 
        // apply mass requirement on the truth jet once you have matched
        if (not truth_matched or (truth_matched->m() < m_minMass or truth_matched->m() > m_maxMass)) {
          continue;
        }
 
        // if truth_matched exists, fill the jet histograms + truth matched
        m_tccPlots.at(name)->fillResponse(*jet, *truth_matched);
        m_tccPlots.at(name)->fillMomentsWithMassCut(*jet);
 
        if (vertices) {
          m_tccPlots.at(name)->fillResponseNPV(*jet, *truth_matched, vertices->size());
        }
 
        // get the calo matched
        const xAOD::Jet* calo_matched = ClusterMatched(jet, caloclusters);
        // if calo_matched exists, fill the jet histograms + calo matched
        if (calo_matched) {
          m_tccPlots.at(name)->fillPseudoResponse(*jet, *calo_matched);
        }
      }
 
      ATH_MSG_DEBUG("All jets histograms filled! ...");
 
      // evaluate the leadings in mass of the leadings is pt
      std::vector<const xAOD::Jet*> leadings = { nullptr, nullptr };
      std::vector<const xAOD::Jet*> leadings_nocuts = { nullptr, nullptr };
 
      std::vector<const xAOD::Jet*> tmp_leadings;
      if (!jets->empty()) {
        tmp_leadings.push_back(jets->at(0));
      }
      if (jets->size() > 1) {
        tmp_leadings.push_back(jets->at(1));
      }
 
      if (tmp_leadings.size() > 1 and tmp_leadings.at(0)->m() < tmp_leadings.at(1)->m()) {
        std::swap(tmp_leadings.at(0), tmp_leadings.at(1));
      }
 
      // fill the leadings jets if they satisfy the eta requirement
      if (!tmp_leadings.empty() and fabs(tmp_leadings.at(0)->eta()) < m_maxEta) {
        leadings_nocuts.at(0) = tmp_leadings.at(0);
      }
 
      if (tmp_leadings.size() > 1 and fabs(tmp_leadings.at(1)->eta()) < m_maxEta) {
        leadings_nocuts.at(1) = tmp_leadings.at(1);
      }
 
      std::vector<const xAOD::Jet*> truth_matches_nocuts = { nullptr, nullptr };
      unsigned int pos = 0;
      for (const auto& jet : leadings_nocuts) {
        pos++;
        if (not jet)
          continue;
        const xAOD::Jet* truth_matched_nocuts = ClusterMatched(jet, truths);
        if (truth_matched_nocuts)
          truth_matches_nocuts.at(pos - 1) = truth_matched_nocuts;
      }
 
      if (leadings_nocuts.at(0)) {
        ATH_MSG_DEBUG(" ---> fillLeading w/o cuts ...");
        if (truth_matches_nocuts.at(0))
          m_tccPlots.at(name)->fillResponseNoPtNoMassCutsLeading(*leadings_nocuts.at(0), *truth_matches_nocuts.at(0));
        ATH_MSG_DEBUG("Leading jet w/o cuts histograms filled! ...");
      }
 
      if (leadings_nocuts.at(1)) {
        ATH_MSG_DEBUG(" ---> fillSubLeading w/o cuts ...");
        if (truth_matches_nocuts.at(1))
          m_tccPlots.at(name)->fillResponseNoPtNoMassCutsSubLeading(*leadings_nocuts.at(1),
                                                                    *truth_matches_nocuts.at(1));
        ATH_MSG_DEBUG("SubLeading jet w/o cuts histograms filled! ...");
      }
 
      // fill the leadings jets if they satisfy the eta and pt requirements
      if (!tmp_leadings.empty() and fabs(tmp_leadings.at(0)->eta()) < m_maxEta and tmp_leadings.at(0)->pt() > m_minPt)
        leadings.at(0) = tmp_leadings.at(0);
 
      if (tmp_leadings.size() > 1 and fabs(tmp_leadings.at(1)->eta()) < m_maxEta and tmp_leadings.at(1)->pt() > m_minPt)
        leadings.at(1) = tmp_leadings.at(1);
 
      if (leadings.at(0)) {
        m_tccPlots.at(name)->fillLeading(*leadings.at(0));
        m_tccPlots.at(name)->fillMomentsLeading(*leadings.at(0));
      }
 
      if (leadings.at(1)) {
        m_tccPlots.at(name)->fillSubLeading(*leadings.at(1));
        m_tccPlots.at(name)->fillMomentsSubLeading(*leadings.at(1));
      }
 
      std::vector<const xAOD::Jet*> truth_matches = { nullptr, nullptr };
      std::vector<const xAOD::Jet*> calo_matches = { nullptr, nullptr };
      pos = 0;
      for (const auto& jet : leadings) {
        pos++;
        if (not jet)
          continue;
        const xAOD::Jet* truth_matched = ClusterMatched(jet, truths);
        if (truth_matched)
          truth_matches.at(pos - 1) = truth_matched;
        const xAOD::Jet* calo_matched = ClusterMatched(jet, caloclusters);
        if (calo_matched)
          calo_matches.at(pos - 1) = calo_matched;
      }
 
      if (leadings.at(0)) {
        ATH_MSG_DEBUG(" ---> fillLeading ...");
        if (truth_matches.at(0) and (truth_matches.at(0)->m() > m_minMass and truth_matches.at(0)->m() < m_maxMass)) {
          m_tccPlots.at(name)->fillMomentsLeadingWithMassCut(*leadings.at(0));
          m_tccPlots.at(name)->fillResponseLeading(*leadings.at(0), *truth_matches.at(0));
          if (vertices)
            m_tccPlots.at(name)->fillResponseLeadingNPV(*leadings.at(0), *truth_matches.at(0), vertices->size());
          if (calo_matches.at(0))
            m_tccPlots.at(name)->fillPseudoResponseLeading(*leadings.at(0), *calo_matches.at(0));
        }
        ATH_MSG_DEBUG("Leading jet histograms filled! ...");
      }
 
      if (leadings.at(1)) {
        ATH_MSG_DEBUG(" ---> fillSubLeading ...");
        if (truth_matches.at(1) and (truth_matches.at(1)->m() > m_minMass and truth_matches.at(1)->m() < m_maxMass)) {
          m_tccPlots.at(name)->fillMomentsSubLeadingWithMassCut(*leadings.at(1));
          m_tccPlots.at(name)->fillResponseSubLeading(*leadings.at(1), *truth_matches.at(1));
          if (vertices)
            m_tccPlots.at(name)->fillResponseSubLeadingNPV(*leadings.at(1), *truth_matches.at(1), vertices->size());
          if (calo_matches.at(1))
            m_tccPlots.at(name)->fillPseudoResponseSubLeading(*leadings.at(1), *calo_matches.at(1));
        }
        ATH_MSG_DEBUG("SubLeading jet histograms filled! ...");
      }
    }
  }
 
  // Getting the collections for TrackParticles
  if (m_saveTrackInfo) {
    const auto *const tracks = getContainer<xAOD::TrackParticleContainer>(m_trackParticleCollectionName);
    if (not tracks)
      return StatusCode::FAILURE;
    for (const auto track : *tracks) {
      if (m_saveMatchingInfo)
        m_tccPlots.at(m_trackParticleCollectionName)->fillMatching(*track);
      m_tccPlots.at(m_trackParticleCollectionName)->fillTrackParametersAllPt(*track);
      m_tccPlots.at(m_trackParticleCollectionName)->fillCaloEntryInfoAllPt(*track);
      m_tccPlots.at(m_trackParticleCollectionName)->fillPerigeeInfoAllPt(*track);
      m_tccPlots.at(m_trackParticleCollectionName)->fillPerigeeVsCaloEntryAllPt(*track);
      if (track->pt() < m_trackPtMin)
        continue;
      m_tccPlots.at(m_trackParticleCollectionName)->fillTrackParameters(*track);
      m_tccPlots.at(m_trackParticleCollectionName)->fillCaloEntryInfo(*track);
      m_tccPlots.at(m_trackParticleCollectionName)->fillPerigeeInfo(*track);
      m_tccPlots.at(m_trackParticleCollectionName)->fillPerigeeVsCaloEntry(*track);
    }
  }
 
  // Getting the collections for the CaloClusters
  if (m_saveClusterInfo) {
    const auto *const clusters = getContainer<xAOD::CaloClusterContainer>(m_caloClusterCollectionName);
    if (not clusters)
      return StatusCode::FAILURE;
    for (const auto cluster : *clusters) {
      m_tccPlots.at(m_caloClusterCollectionName)->fillCluster(*cluster);
      if (fabs(cluster->eta()) < m_caloClusterEtaMax)
        m_tccPlots.at(m_caloClusterCollectionName)->fillClusterEtaCut(*cluster);
    }
  }
 
  // Getting the collections for the TrackCaloClusters
  if (m_saveTCCInfo) {
    for (const auto& name : m_TCCCombinedCollectionNames) {
      const auto *const tccs = getContainer<xAOD::TrackCaloClusterContainer>(name);
      if (not tccs)
        return StatusCode::FAILURE;
      // fill the map with all the tracks creating tcc (means from PV0)
      std::vector<const xAOD::TrackParticle*> allpv0tracks;
      for (const auto tcc : *tccs) {
        allpv0tracks.push_back(*tcc->trackParticleLink());
      }
 
      for (const auto tcc : *tccs) {
        m_tccPlots.at(name)->fillTCC(*tcc, allpv0tracks);
        if (tcc->pt() > m_tccPtMin)
          m_tccPlots.at(name)->fillTCCptCut(*tcc);
        if (fabs(tcc->eta()) < m_tccEtaMax)
          m_tccPlots.at(name)->fillTCCetaCut(*tcc);
      }
    }
  }
 
  return StatusCode::SUCCESS;
}
 
const xAOD::Jet*
TrackCaloClusterRecValidationTool::ClusterMatched(const xAOD::Jet* jet, const xAOD::JetContainer* jets)
{
  std::vector<const xAOD::Jet*> myjets = {};
  for (const auto tomatch : *jets)
    myjets.push_back(tomatch);
  return ClusterMatched(jet, myjets);
}
 
const xAOD::Jet*
TrackCaloClusterRecValidationTool::ClusterMatched(const xAOD::Jet* jet, const std::vector<const xAOD::Jet*>& jets) const
{
  double minDeltaR = m_maxJetDR;
  const xAOD::Jet* matched = nullptr;
  for (const auto& tomatch : jets) {
    if (jet->p4().DeltaR(tomatch->p4()) < minDeltaR) {
      minDeltaR = jet->p4().DeltaR(tomatch->p4());
      matched = tomatch;
    }
  }
  return matched;
}
 
StatusCode
TrackCaloClusterRecValidationTool::bookHistograms()
{
  ATH_MSG_INFO("Booking hists " << name() << "...");
  for (auto& plots : m_tccPlots) {
    plots.second->setDetailLevel(100); // DEBUG, enable expert histograms
    plots.second->initialize();
    std::vector<HistData> hists = plots.second->retrieveBookedHistograms();
    for (const auto& hist : hists) {
      ATH_CHECK(regHist(hist.first, hist.second, all));
    }
  }
 
  return StatusCode::SUCCESS;
}
 
StatusCode
TrackCaloClusterRecValidationTool::procHistograms()
{
  ATH_MSG_INFO("Finalising hists " << name() << "...");
 
  if (endOfRunFlag()) {
    for (auto& plots : m_tccPlots)
      plots.second->finalize();
  }
 
  ATH_MSG_INFO("Successfully finalized hists");
  return StatusCode::SUCCESS;
}

const xAOD::JetContainer*
TrackCaloClusterRecValidationTool::calibrateAndRecordShallowCopyJetCollection(const xAOD::JetContainer* jetContainer,
                                                                              const std::string& name,
                                                                              const EventContext& ctx)
{
 
  // create a shallow copy of the jet container
  xAOD::ShallowCopyResult_t<xAOD::JetContainer> shallowCopy =
    xAOD::shallowCopy(*jetContainer, ctx);
 
  int pos = std::find(m_jetCalibrationCollections.begin(), m_jetCalibrationCollections.end(), name) -
            m_jetCalibrationCollections.begin();
  if (m_jetCalibrationTools[pos]->applyCalibration(*shallowCopy.first).isFailure()) {
    ATH_MSG_WARNING("Failed to apply calibration to the jet container");
    return nullptr;
  }
 
  static const SG::AuxElement::Accessor<xAOD::IParticleLink> accSetOriginLink("originalObjectLink");
  for (xAOD::Jet* shallowCopyJet : *shallowCopy.first) {
    const xAOD::IParticleLink originLink(*jetContainer, shallowCopyJet->index());
    accSetOriginLink(*shallowCopyJet) = originLink;
  }
 
  xAOD::JetContainer* jetContainerShallowCopy = shallowCopy.first.get();
 
  if (evtStore()->record(std::move(shallowCopy.first), name + "_Calib").isFailure()) {
    ATH_MSG_WARNING("Unable to record JetCalibratedContainer: " << name + "_Calib");
    return nullptr;
  }
  if (evtStore()->record(std::move(shallowCopy.second), name + "_Calib" + "Aux.").isFailure()) {
    ATH_MSG_WARNING("Unable to record JetCalibratedAuxContainer: " << name + "_Calib" + "Aux.");
    return nullptr;
  }
 
  return jetContainerShallowCopy;
}