TrackMatchingLookup.icc

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
/// local include(s)
#include "TrackParametersHelper.h"
#include "InDetTrackPerfMon/ITrackAnalysisDefinitionSvc.h"
 
/// gaudi includes
#include "GaudiKernel/ISvcLocator.h"
#include "GaudiKernel/Service.h"
 
/// STD includes
#include <sstream>
#include <algorithm>
 
 
/// Constructor
template< typename T, typename R >
IDTPM::TrackMatchingLookupBase<T, R>::TrackMatchingLookupBase(
  const std::string& anaTag_s ) :
    AthMessaging( "TrackMatchingLookup" + anaTag_s ),
    m_anaTag( anaTag_s ), m_mapTestToRef(), m_mapRefToTest() { }
 
 
/// getMatchedRef
template< typename T, typename R >
const R* IDTPM::TrackMatchingLookupBase<T, R>::getMatchedRef( const T& t ) const
{
  typename mapTtoR_t::const_iterator titr = m_mapTestToRef.find( &t );
  if( titr != m_mapTestToRef.end() ) return titr->second;
  return nullptr;
}
 
 
/// getMatchedTest
template< typename T, typename R >
const std::vector<const T*>&
IDTPM::TrackMatchingLookupBase<T, R>::getMatchedTest( const R& r ) const
{
  typename mapRtoT_t::const_iterator titr = m_mapRefToTest.find( &r );
  if( titr != m_mapRefToTest.end() ) return titr->second;
  return m_nullTest;
}
 
 
/// getDist
template< typename T, typename R >
float IDTPM::TrackMatchingLookupBase<T, R>::getDist( const T& t ) const
{
  typename mapTtoDist_t::const_iterator titr = m_mapTestToDist.find( &t );
  if( titr != m_mapTestToDist.end() ) return titr->second;
  return 999.; /// very large distance
}
 
 
/// isTestInMaps
template< typename T, typename R >
bool IDTPM::TrackMatchingLookupBase<T, R>::isTestInMaps( const T& t ) const
{
  return ( getMatchedRef(t) != nullptr );
}
 
 
/// isRefInMaps 
template< typename T, typename R >
bool IDTPM::TrackMatchingLookupBase<T, R>::isRefInMaps( const R& r ) const
{
  return ( not getMatchedTest(r).empty() );
} 
 
 
/// updateMaps
template< typename T, typename R >
StatusCode IDTPM::TrackMatchingLookupBase<T, R>::updateMaps(
    const T& t, const R& r, float dist )
{
  ATH_MSG_DEBUG( "Adding new match = test : pT = " << pT(t) <<
                 " -> reference : pT = " << pT(r) );  
 
  /// Test->Reference caching (1 to 1)
  std::pair< typename mapTtoR_t::iterator, bool > retTtoR =
    m_mapTestToRef.insert( typename mapTtoR_t::value_type( &t, &r ) );
 
  if( not retTtoR.second ) {
    ATH_MSG_DEBUG( "Test is already matched to reference with pT = " <<
                   pT( *(retTtoR.first->second) ) <<
                   " .\n\t-> New matched reference is not cached!" );
  }
 
  /// Test->Distance caching (1 to 1)
  m_mapTestToDist.insert( typename mapTtoDist_t::value_type( &t, dist ) );
 
  /// (Reverse) Reference -> Test(s) caching (1 to 1+)
  /// The matched test vector is sorted by increasing values of the distance parameter
  /// i.e. the first element will always be the best-matched test
  if( isRefInMaps(r) ) {
    typename mapRtoT_t::iterator mitr = m_mapRefToTest.find( &r );
    if (mitr != m_mapRefToTest.end()){
      ATH_MSG_DEBUG( "Reference already matched to other " <<
                     mitr->second.size() << " test(s). Adding a new one..." );
      /// copy of the matched test vector
      std::vector< const T* > tvec = mitr->second;
      /// Adding the new test track
      tvec.push_back( &t );
      /// sorting the vector by increasing distance
      std::sort( tvec.begin(), tvec.end(),
                 [&]( const T* t1, const T* t2 ) -> bool{
                    return ( getDist(*t1) < getDist(*t2) ); } );
      /// update the vector in the map
      mitr->second.clear();
      mitr->second.insert( mitr->second.begin(), tvec.begin(), tvec.end() );
    }
  }
  else {
    std::vector< const T* > tvec; // creating new vector of matched tests
    tvec.push_back( &t );
    m_mapRefToTest.insert( typename mapRtoT_t::value_type( &r, tvec ) );
  }
 
  return StatusCode::SUCCESS;
}
 
 
/// clear lookup tables
template< typename T, typename R >
void IDTPM::TrackMatchingLookupBase<T, R>::clearMaps()
{
  m_mapTestToRef.clear();
  m_mapRefToTest.clear();
  m_mapTestToDist.clear();
}
 
 
/// print info about matching and reverse matchings
template< typename T, typename R >
std::string IDTPM::TrackMatchingLookupBase<T, R>::printMaps(
    const std::vector< const T* >& testVec,
    const std::vector< const R* >& refVec,
    std::string_view chainRoiName_s ) const
{
  std::string testT(""), refT("");
  ISvcLocator* svcLoc = Gaudi::svcLocator();
  SmartIF<ITrackAnalysisDefinitionSvc> trkAnaDefSvc(svcLoc->service( "TrkAnaDefSvc"+m_anaTag ));
  if( trkAnaDefSvc ) {
    testT = "( " + trkAnaDefSvc->testType() + " ) ";
    refT  = "( " + trkAnaDefSvc->referenceType()  + " ) ";
  } else {
    ATH_MSG_DEBUG( "Could not retrieve TrkAnaDefSvc" << m_anaTag );
  }
 
  std::stringstream ss;
  ss << "TrackMatchingLookup" << m_anaTag << " : " << chainRoiName_s
     <<" --> Found " << getMapsSize() << " matches\n";
  if( getMapsSize() == 0 ) return ss.str();
 
  ss << "\t\tTest " << testT
     << "-> Reference " << refT << "matches:\n";
  size_t it(0);
  for( const T* t : testVec ) {
    ss << "\t\t\t\tTest with pT = " << pT(*t)
       << " matches with --> ";
    if( isTestInMaps(*t) ) {
      ss << "Reference with pT = "
         << pT( *(getMatchedRef(*t)) )
         << " (dist = " << getDist(*t) << ")\n";
    } else {
      ss << "N/A\n";
    }
    if( it > 20 ) { ss << "et al...\n"; break; }
    it++;
  }
 
  ss << "\t\tReference -> Test matches:\n";
  it = 0;
  for( const R* r : refVec ) {
    std::vector<const T*> testVecMatch = getMatchedTest(*r);
    ss << "\t\t\t\tReference with pT = "
       << pT(*r) << " matches with --> ";
    if( testVecMatch.empty() ) ss << "N/A\n";
    else {
      ss << "tests with pTs = [";
      for( size_t it=0 ; it<testVecMatch.size() ; it++ ) {
        ss << " " << pT( *(testVecMatch.at(it)) );
        if( it+1 != testVecMatch.size() ) ss << " ,";
      }
      ss << " ]\n";
    }
    if( it > 20 ) { ss << "et al...\n"; break; }
    it++;
  }
 
  return ss.str();
}