Reconstruction/MuonIdentification/MuonCombinedEvent/src/MuonCandidate.cxx

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
#include "MuonCombinedEvent/MuonCandidate.h"
 
#include "MuonSegment/MuonSegment.h"
#include "TrkParameters/TrackParameters.h"
#include "TrkTrack/Track.h"
 
namespace MuonCombined {
 
    MuonCandidate::MuonCandidate(const ElementLink<xAOD::TrackParticleContainer>& trackLink) :
        m_muonSpectrometerTrackLink(trackLink), m_muonSpectrometerTrack((*m_muonSpectrometerTrackLink)->track()) {}
    MuonCandidate::MuonCandidate(const ElementLink<xAOD::TrackParticleContainer>& trackLink,
                                 const ElementLink<TrackCollection>& saTrackLink, size_t container_idx) :
        m_muonSpectrometerTrackLink(trackLink),
        m_extrapolatedTrackLink(saTrackLink),
        m_muonSpectrometerTrack((*m_muonSpectrometerTrackLink)->track()),
        m_extContIdx(container_idx) {}
 
    MuonCandidate::MuonCandidate(const MuonCandidate& oldCandidate, const ElementLink<xAOD::TrackParticleContainer>& msoeTrackLink) :
        m_muonSpectrometerTrackLink{oldCandidate.m_muonSpectrometerTrackLink},
        m_extrapolatedParticleLink{msoeTrackLink},
        m_extrapolatedTrackLink{(*msoeTrackLink)->trackLink()},
        m_muonSpectrometerTrack{oldCandidate.m_muonSpectrometerTrack},
        m_assoc_segments{oldCandidate.m_assoc_segments},
        m_extContIdx{oldCandidate.m_extContIdx} {}
 
    MuonCandidate::~MuonCandidate() = default;
 
    std::string MuonCandidate::toString() const {
        const Trk::Track* track = primaryTrack();
        const Trk::Perigee* perigee = track->perigeeParameters();
        std::ostringstream sout;
        if (!perigee)
            sout << " Track has no perigee parameters!";
        else
            sout << " pt " << perigee->momentum().perp() << " eta " << perigee->momentum().eta() << " phi " << perigee->momentum().phi();
        sout << " hasExtrapolatedTrack " << (extrapolatedTrack() ? "yes" : "no") << std::endl;
        return sout.str();
    }
 
    const Trk::Track& MuonCandidate::muonSpectrometerTrack() const { return *m_muonSpectrometerTrack; }
 
    const ElementLink<xAOD::TrackParticleContainer>& MuonCandidate::muonSpectrometerTrackLink() const {
        return m_muonSpectrometerTrackLink;
    }
    const Trk::Track* MuonCandidate::extrapolatedTrack() const {
        return m_extrapolatedTrackLink.isValid() ? *m_extrapolatedTrackLink : nullptr;
    }
    const Trk::Track* MuonCandidate::primaryTrack() const {
        const Trk::Track* ext_trk = extrapolatedTrack();
        return ext_trk ? ext_trk : &muonSpectrometerTrack();
    }
 
    const ElementLink<TrackCollection>& MuonCandidate::extrapolatedTrackLink() const { return m_extrapolatedTrackLink; }
    size_t MuonCandidate::extrapolatedElementID() const { return m_extrapolatedTrackLink.isValid() ? m_extContIdx : -1; }
 
    void MuonCandidate::setSegments(std::vector<const Muon::MuonSegment*>&& segments) { m_assoc_segments = std::move(segments); }
    const std::vector<const Muon::MuonSegment*>& MuonCandidate::getSegments() const { return m_assoc_segments; }
    const ElementLink<xAOD::TrackParticleContainer>& MuonCandidate::extrapolatedParticleLink() const { return m_extrapolatedParticleLink; }
 
}  // namespace MuonCombined