MdtIdHelper.h

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/*
  Copyright (C) 2002-2023 CERN for the benefit of the ATLAS collaboration
*/
 
// ******************************************************************************
// ATLAS Muon Identifier Helpers Package
// -----------------------------------------
// ******************************************************************************
 
//<doc><file> $Id: MdtIdHelper.h,v 1.34 2009-01-20 22:44:13 kblack Exp $
//<version>   $Name: not supported by cvs2svn $
 
#ifndef MUONIDHELPERS_MDTIDHELPER_H
#define MUONIDHELPERS_MDTIDHELPER_H
 
// Includes
 
#include "MuonIdHelpers/MuonIdHelper.h"
 
// ******************************************************************************
// class MdtIdHelper
// ******************************************************************************
//
// Description
// -----------
// This factory class constructs MDT identifiers and ranges and provides access
// to the levels.  ATLAS note ATL-MUON-2002-??? provides a complete description
// of the hierarchical identifier scheme.  MdtIdHelper provides an interface to the
// following fields of the identifier.
//
// Field           Range               Notes
// ==============================================================================
// StationName     unsigned integer    maps to "BIL", "EMS" ,etc.
// StationEta      [-6,-1]             backward endcap (-1 at lowest R)
//                 [-8,8]              barrel (increases with Z)
//                 [-6,-1]+[1,6]       forward endcap (1 at lowest R)
// StationPhi      [1,8]               increases with phi
// Technology      [0]                 maps to "MDT"
// Multilayer      [1,2]               barrel: increases with R
//                                     endcap: increases with |Z|
// TubeLayer       [1,4]               barrel: increases with R
//                                     endcap: increases with |Z|
// Tube            [1,n]               barrel: increases with |Z|
//                                     endcap: increases with R
// ==============================================================================
//
// Inheritance
// -----------
// Inherits from MuonIdHelpers/MuonIdHelper.
//
// Author
// ------
// Steven Goldfarb <Steven.Goldfarb@cern.ch>
//
// Compact Id implementation by
// Ketevi A. Assamagan <ketevi@bnl.gov>
// BNL, March 10th, 2003
//
// ******************************************************************************
 
class MdtIdHelper : public MuonIdHelper {
public:
    static constexpr int maxNTubesPerLayer = 120;
 
    // Constructor
    MdtIdHelper();
 
    // Destructor
 
    virtual ~MdtIdHelper() = default;
 
 
    virtual int initialize_from_dictionary(const IdDictMgr& dict_mgr) override;
    virtual int get_module_hash(const Identifier& id, IdentifierHash& hash_id) const override;
    virtual int get_detectorElement_hash(const Identifier& id, IdentifierHash& hash_id) const override;
 
 
    // Atlas Identifier builders
 
    Identifier elementID(int stationName, int stationEta, int stationPhi) const;
    Identifier elementID(int stationName, int stationEta, int stationPhi, bool& isValid) const;
 
    Identifier elementID(const std::string& stationNameStr, int stationEta, int stationPhi) const;
    Identifier elementID(const std::string& stationNameStr, int stationEta, int stationPhi, bool& isValid) const;
 
    Identifier elementID(const Identifier& channelID) const;
 
    Identifier channelID(int stationName, int stationEta, int stationPhi, int multilayer, int tubeLayer, int tube) const;
    Identifier channelID(int stationName, int stationEta, int stationPhi, int multilayer, int tubeLayer, int tube, bool& isValid) const;
 
    Identifier channelID(const std::string& stationNameStr, int stationEta, int stationPhi, int multilayer, int tubeLayer, int tube) const;
    Identifier channelID(const std::string& stationNameStr, int stationEta, int stationPhi, int multilayer, int tubeLayer, int tube,
                         bool& isValid) const;
 
    Identifier channelID(const Identifier& id, int multilayer, int tubeLayer, int tube) const;
    Identifier channelID(const Identifier& id, int multilayer, int tubeLayer, int tube, bool& isValid) const;
 
    Identifier parentID(const Identifier& id) const;
 
    Identifier multilayerID(const Identifier& channeldID) const;
 
    Identifier multilayerID(const Identifier& moduleID, int multilayer) const;
    Identifier multilayerID(const Identifier& moduleID, int multilayer, bool& isValid) const;
 
    // for an Identifier id, get the list of the daughter readout channel ids
    void idChannels(const Identifier& id, std::vector<Identifier>& vect) const;
 
    // Access to levels: missing field returns 0
    int channel(const Identifier& id) const override;
 
    int multilayer(const Identifier& id) const;
    int tubeLayer(const Identifier& id) const;
    int tube(const Identifier& id) const;
 
    int numberOfMultilayers(const Identifier& id) const;
 
    // Access to min and max of level ranges
 
    static int stationEtaMin(bool barrel) ;
    static int stationEtaMax(bool barrel) ;
    static int stationPhiMin() ;
    static int stationPhiMax() ;
    static int multilayerMin() ;
    static int multilayerMax() ;
    static int tubeLayerMin() ;
    static int tubeLayerMax() ;
    static int tubeMin() ;
    int tubeMax() const;
 
    // Access to min and max of level ranges
 
    int stationEtaMin(const Identifier& id) const;
    int stationEtaMax(const Identifier& id) const;
    int stationPhiMin(const Identifier& id) const;
    int stationPhiMax(const Identifier& id) const;
    int multilayerMin(const Identifier& id) const;
    int multilayerMax(const Identifier& id) const;
    int tubeLayerMin(const Identifier& id) const;
    int tubeLayerMax(const Identifier& id) const;
    int tubeMin(const Identifier& id) const;
    int tubeMax(const Identifier& id) const;
 
    // etamin, etamax, phimin, phimax
    std::tuple<int, int, int, int>
    stationEtaPhiMinMax(const Identifier& id) const;
    std::pair<int, int> stationEtaMinMax(const Identifier& id) const;
    std::pair<int, int> stationPhiMinMax(const Identifier& id) const;
    std::pair<int, int> multilayerMinMax(const Identifier& id) const;
    std::pair<int, int> tubeLayerMinMax(const Identifier& id) const;
    std::pair<int, int> tubeMinMax(const Identifier& id) const;
 
    // Public validation of levels
 
    bool valid(const Identifier& id) const;
    bool validElement(const Identifier& id) const;
 
    int gasGap(const Identifier& id) const override;
    bool measuresPhi(const Identifier& id) const override;
    bool isBMG(const Identifier& id) const;
    bool isBME(const Identifier& id) const;
 
private:
    bool isStNameInTech(const std::string& stationName) const override;
    int init_id_to_hashes();
    
    static constexpr unsigned s_stDim = 55;
    static constexpr unsigned s_etaDim = 16;
    static constexpr unsigned s_phiDim = 8;
    static constexpr unsigned s_mlDim = 2;    
    static constexpr unsigned int s_modHash = s_stDim * s_etaDim * s_phiDim;
    static constexpr unsigned int s_detDim = s_modHash * s_mlDim;
    
    unsigned int moduleHashIdx(const Identifier& id) const;
    unsigned int detEleHashIdx(const Identifier& id) const;
 
    std::array<unsigned int, s_modHash> m_module_hashes{};
    std::array<unsigned int, s_detDim>  m_detectorElement_hashes{};
 
    // compact id indices
    size_type m_TUBELAYER_INDEX{0};
    IdDictFieldImplementation m_mla_impl;
    IdDictFieldImplementation m_lay_impl;
    IdDictFieldImplementation m_tub_impl;
 
    // Private validation of levels
 
    bool validElement(const Identifier& id, int stationName, int stationEta, int stationPhi) const;
    bool validChannel(const Identifier& id, int stationName, int stationEta, int stationPhi, int multilayer, int tubeLayer, int tube) const;
 
    // Utility method
 
    int mdtTechnology() const;
 
    // Level indices
 
    enum MdtIndices { MultilayerIndex = 5, TubeLayerIndex = 6, TubeIndex = 7 };
 
    // Level ranges
 
    enum MdtRanges {
        StationEtaBarrelMin = -8,
        StationEtaBarrelMax = 8,
        StationEtaEndcapMin = -6,
        StationEtaEndcapMax = 6,
        StationPhiMin = 1,
        StationPhiMax = 8,
        MultilayerMin = 1,
        MultilayerMax = 2,
        TubeLayerMin = 1,
        TubeLayerMax = 4,
        TubeMin = 1,
        TubeMax = 78
    };
    unsigned int m_tubesMax{UINT_MAX};  // maximum number of tubes in any chamber
 
    int m_BME_stat{-1};
    int m_BMG_stat{-1};
 
    // To speed up the range scans needed by the MinMax functions,
    // keep indices of ranges by station name.
    using ranges_by_station_t = std::vector<std::vector<const Range*> >;
    ranges_by_station_t m_module_ranges_by_station;
    ranges_by_station_t m_channel_ranges_by_station;
 
    std::pair<int, int>
    findMinMax (const Identifier& id,
                const size_type field_index,
                const ranges_by_station_t& ranges_by_station) const;
};
 
// For backwards compatibility
 
typedef MdtIdHelper MDT_ID;
 
CLASS_DEF(MdtIdHelper, 4170, 1)
 
// Construct Atlas Identifiers from components
 
#endif  // MUONIDHELPERS_MDTIDHELPER_H