EvtCollectionSelector.cpp

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/***********************************************************************************\
* (c) Copyright 1998-2025 CERN for the benefit of the LHCb and ATLAS collaborations *
*                                                                                   *
* This software is distributed under the terms of the Apache version 2 licence,     *
* copied verbatim in the file "LICENSE".                                            *
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* granted to it by virtue of its status as an Intergovernmental Organization        *
* or submit itself to any jurisdiction.                                             *
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#include <GaudiKernel/NTuple.h>
#include <GaudiKernel/ObjectFactory.h>
#include <GaudiKernel/Selector.h>
#include <GaudiKernel/System.h>
#include <GaudiKernel/ToStream.h>
#include <GaudiTestSuite/MyTrack.h>
#include <cmath>
 
#ifdef __ICC
// disable icc warning #1125: function "ISelectStatement::operator()(void *)"
//           is hidden by "Gaudi::TestSuite::EvtCollectionSelector::operator()"
//            -- virtual function override intended?
#  pragma warning( disable : 1125 )
// disable icc remark #1572: floating-point equality and inequality comparisons are unreliable
#  pragma warning( disable : 1572 )
#endif
namespace Gaudi {
  namespace TestSuite {
    class EvtCollectionSelector : public NTuple::Selector {
    protected:
      NTuple::Item<int>    m_ntrack;
      NTuple::Array<float> m_trkMom;
#ifndef NO_TRKMOMFIX
      NTuple::Array<float> m_trkMomFixed;
#endif
      NTuple::Item<Gaudi::TestSuite::MyTrack*> m_track;
      int                                      m_cut = 10;
 
    public:
      using NTuple::Selector::Selector;

      StatusCode initialize( NTuple::Tuple* nt ) override {
        StatusCode sc = StatusCode::SUCCESS;
        sc            = nt->item( "TrkMom", m_trkMom );
        if ( !sc.isSuccess() ) {
          std::cerr << "EvtCollectionSelector: initialize " << sc << std::endl;
          std::cerr << "TrkMom" << std::endl;
          return sc;
        }
#ifndef NO_TRKMOMFIX
        sc = nt->item( "TrkMomFix", m_trkMomFixed );
        if ( !sc.isSuccess() ) {
          std::cerr << "EvtCollectionSelector: initialize " << sc << std::endl;
          std::cerr << "TrkMomFix" << std::endl;
          return sc;
        }
#endif
        sc = nt->item( "Ntrack", m_ntrack );
        if ( !sc.isSuccess() ) {
          std::cerr << "EvtCollectionSelector: initialize " << sc << std::endl;
          std::cerr << "Ntrack" << std::endl;
          return sc;
        }
 
        sc = nt->item( "Track", m_track );
        if ( !sc.isSuccess() ) {
          std::cerr << "EvtCollectionSelector: initialize " << sc << std::endl;
          std::cerr << "Track" << std::endl;
          return sc;
        }
 
        return sc;
      }
 
      using NTuple::Selector::operator(); // avoid hiding base-class methods
      bool operator()( NTuple::Tuple* /* nt */ ) override {
        const int n = m_ntrack;
        std::cout << System::typeinfoName( typeid( *this ) ) << "\t -> #tracks : " << n << std::endl
                  << System::typeinfoName( typeid( *this ) ) << "\t -> Momenta(Var): ";
        for ( int i = 0; i < std::min( 5, n ); ++i ) { std::cout << "[" << i << "]=" << m_trkMom[i] << " "; }
#ifndef NO_TRKMOMFIX
        std::cout << std::endl << System::typeinfoName( typeid( *this ) ) << "\t -> Momenta(Fix): ";
        for ( int i = 0; i < std::min( 5, n ); ++i ) { std::cout << "[" << i << "]=" << m_trkMomFixed[i] << " "; }
        for ( int i = 5; i < 99; ++i ) {
          if ( std::abs( m_trkMomFixed[i] ) > std::numeric_limits<float>::epsilon() ) {
            std::cout << "[" << i << "]= Error in Fixed momentum" << std::endl;
          }
        }
#endif
        std::cout << std::endl;
        std::cout << System::typeinfoName( typeid( *this ) );
        if ( 0 != *m_track ) {
          std::cout << "\t -> Track : "
                    << " px=" << ( *m_track )->px() << " py=" << ( *m_track )->py() << " pz=" << ( *m_track )->pz()
                    << std::endl;
        } else {
          std::cout << " Track* is NULL" << std::endl;
        }
        //
        const bool selected = m_cut < m_ntrack && 0 != *m_track;
        std::cout << System::typeinfoName( typeid( *this ) ) << "   SELECTED : ";
        Gaudi::Utils::toStream( selected, std::cout ) << std::endl;
        //
        return selected; // RETURN
      }
    };
    DECLARE_OBJECT_FACTORY( EvtCollectionSelector )
  } // namespace TestSuite
} // end of namespace Gaudi