BmnSimpleDM.h

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/*
    BM@N alignment routine
    BM@N experiment at NICA complex, JINR, 2025
 
    Department: Math & Soft Group of HEP lab
    Author:     Igor Polev, polev@jinr.int
 
    BmnSimpleDM class declaration
    Trivial enumerated detector elements starting from 0
    For use in alignment test algorithm
*/
 
#ifndef BMNSIMPLEDM_H
#define BMNSIMPLEDM_H
 
#include "BmnDetectorModel.h"
 
#include <TString.h>
 
class BmnSimpleDM : public BmnDetectorModel
{
  private:
    Int_t fIdx;
    const Int_t fModuleCnt;
 
  protected:
    // detector modules enumeration: see base class
    virtual void Reset() noexcept override
    {
        fIdx = -1;   // must set iterator BEFORE first element
                     // according to base class definition
    }
    virtual Int_t NextID() noexcept override
    {
        fIdx++;
        if (0 > fIdx || fIdx >= fModuleCnt)
            return fIdx = -2;   // -1 is reserved for reset status
        return fIdx;
    }
 
  public:
    virtual Int_t MaxModulesInStation() const noexcept override { return 1; }
    virtual Int_t Alignables() const noexcept override { return fModuleCnt; }
    // Dumb converter - not intended to be used
    virtual Int_t IDfromHit(Int_t HitDetectorID) const noexcept override { return HitDetectorID; }
    // the ID is the element index itself, there is nothing to decode
    virtual std::string DecodeID(Int_t id) const override { return Form("elem %3d", id); }
 
    BmnSimpleDM() = delete;
    explicit BmnSimpleDM(Int_t moduleCnt)
        : fModuleCnt(moduleCnt) {};
    virtual ~BmnSimpleDM() override;   // out-of-line vtable anchor
};
 
#endif   // BMNSIMPLEDM_H