TrackIsolationDecorAlg.h

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
#ifndef TRACKISOLATIONDECORALG_H_
#define TRACKISOLATIONDECORALG_H_
 
#include "AthenaBaseComps/AthReentrantAlgorithm.h"
#include "StoreGate/ReadHandleKey.h"
#include "StoreGate/WriteDecorHandleKey.h"
#include "StoreGate/ReadDecorHandleKeyArray.h"
#include "xAODPrimitives/IsolationType.h"
#include "xAODTracking/VertexContainer.h"
 
#include "RecoToolInterfaces/ITrackIsolationTool.h"
#include "RecoToolInterfaces/IsolationCommon.h"
 
namespace DerivationFramework {
class TrackIsolationDecorAlg : public AthReentrantAlgorithm {
public:
    using AthReentrantAlgorithm::AthReentrantAlgorithm;

    ~TrackIsolationDecorAlg();

    StatusCode initialize() override;
    StatusCode execute(const EventContext& ctx) const override;
 
private:
    static bool isSame(const xAOD::IParticle* a, const xAOD::IParticle* b);
    SG::ReadHandleKey<xAOD::TrackParticleContainer> m_idTrkKey{this, "IdTrackCollection", "InDetTrackParticles",
                                                                "Collection of track particles making up the isolation cones"};
    
    SG::ReadHandleKey<xAOD::TrackParticleContainer> m_toDeorTrkKey{this, "TrackCollection", "InDetTrackParticles",
                                                              "Collection of track particles to decorate the isolation onto"};
    SG::ReadHandleKey<xAOD::VertexContainer> m_vtx_key{this, "VertexCollection", "PrimaryVertices"};
 
    Gaudi::Property<std::string> m_customName{this, "customName", "", "Custom appendix of the isolation variables"};
 
    Gaudi::Property<float> m_pt_min{this, "PtMin", 2.5 * Gaudi::Units::GeV, "Minimal track pt required to decorate the ID track"};

    Gaudi::Property<std::vector<std::string>> m_trkSel_Decors{this, "TrackSelections", {},
                                                "List of decorator names of which one needs to be true to run the isolation" };
    SG::ReadDecorHandleKeyArray<xAOD::TrackParticleContainer> m_trkSel_keys{this, "SelectionKeys", {},
                                                                            "Will be overwritten in initialize"};
    
    SG::WriteDecorHandleKey<xAOD::TrackParticleContainer> m_ptcone20_key{this, "IsoPtCone20", m_toDeorTrkKey, ""};
    SG::WriteDecorHandleKey<xAOD::TrackParticleContainer> m_ptcone30_key{this, "IsoPtCone30", m_toDeorTrkKey, ""};
    SG::WriteDecorHandleKey<xAOD::TrackParticleContainer> m_ptcone40_key{this, "IsoPtCone40", m_toDeorTrkKey, ""};
 
    SG::WriteDecorHandleKey<xAOD::TrackParticleContainer> m_ptvarcone20_key{this, "IsoPtVarCone20", m_toDeorTrkKey, ""};
    SG::WriteDecorHandleKey<xAOD::TrackParticleContainer> m_ptvarcone30_key{this, "IsoPtVarCone30", m_toDeorTrkKey, ""};
    SG::WriteDecorHandleKey<xAOD::TrackParticleContainer> m_ptvarcone40_key{this, "IsoPtVarCone40", m_toDeorTrkKey, ""};
 
    ToolHandle<xAOD::ITrackIsolationTool> m_isoTool{this, "IsolationTool", ""};
 
    std::vector<xAOD::Iso::IsolationType> m_trk_iso_types{xAOD::Iso::ptcone40, xAOD::Iso::ptcone30, xAOD::Iso::ptcone20};
    xAOD::TrackCorrection m_trk_corr{};
};
}
#endif /* TRACKISOLATIONDECORALG_H_ */