CalibratedTracksProvider.cxx

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
// Local include(s):
#include "CalibratedTracksProvider.h"
 
#include "xAODBase/IParticleHelpers.h"
#include "xAODCore/ShallowCopy.h"
 
namespace CP {
 
    CalibratedTracksProvider::CalibratedTracksProvider(const std::string& name, ISvcLocator* svcLoc) : AthAlgorithm(name, svcLoc) {}
 
    StatusCode CalibratedTracksProvider::initialize() {
        ATH_CHECK(m_eventInfo.initialize());
        ATH_CHECK(m_inputKey.initialize());
        ATH_CHECK(m_outputKey.initialize());
        ATH_CHECK(m_rndNumKey.initialize(m_useRndNumber));
        ATH_CHECK(m_tool.retrieve());
        return StatusCode::SUCCESS;
    }
 
    StatusCode CalibratedTracksProvider::execute(const EventContext& ctx) {
        SG::ReadHandle<xAOD::TrackParticleContainer> tracks{m_inputKey, ctx};
        if (!tracks.isValid()) {
            ATH_MSG_FATAL("No muon container found");
            return StatusCode::FAILURE;
        }
 
        xAOD::ShallowCopyResult_t<xAOD::TrackParticleContainer> output =
            xAOD::shallowCopy(*tracks, ctx);
 
        if (!output.first || !output.second) {
            ATH_MSG_FATAL("Creation of shallow copy failed");
            return StatusCode::FAILURE;
        }
 
        if (!setOriginalObjectLink(*tracks, *output.first)) {
            ATH_MSG_ERROR("Failed to add original object links to shallow copy of " << m_inputKey);
            return StatusCode::FAILURE;
        }
 
        for (xAOD::TrackParticle* iParticle : *(output.first)) {
            ATH_MSG_VERBOSE("Old pt=" << iParticle->pt());
            if (m_tool->applyCorrectionTrkOnly(*iParticle, m_detType).code() == CorrectionCode::Error) return StatusCode::FAILURE;
            ATH_MSG_VERBOSE("New pt=" << iParticle->pt());
        }
        SG::WriteHandle<xAOD::TrackParticleContainer> writeHandle{m_outputKey, ctx};
        ATH_CHECK(writeHandle.recordNonConst(std::move(output.first), std::move(output.second)));
 
        // Return gracefully:
        return StatusCode::SUCCESS;
    }
 
}  // namespace CP