CombinationsGrouper.cxx

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/*
  Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
*/
 
#include "TrigHLTJetHypo/TrigHLTJetHypoUtils/CombinationsGrouper.h"
#include "TrigHLTJetHypo/TrigHLTJetHypoUtils/CombinationsGen.h"
 
#include <sstream>
 
CombinationsGrouper::CombinationsGrouper(){}
 
CombinationsGrouper::CombinationsGrouper(unsigned int groupSize):
  m_groupSize{groupSize}{}
 
 
CombinationsGrouper::CombinationsGrouper(unsigned int groupSize,
                     const HypoJetVector& jets):
  m_groupSize(groupSize), m_jets{jets}{
}
 
 
CombinationsGrouper::CombinationsGrouper(unsigned int groupSize,
                     const HypoJetCIter& b,
                     const HypoJetCIter& e):
  m_groupSize(groupSize), m_jets{b, e}{
}
 
 
HypoJetVector CombinationsGrouper::next() {
  HypoJetGroupVector hjgv;
  
  // create a combinations generator. Used to select the jets
  // to be tested by the condition objects
  CombinationsGen combgen(m_jets.size(), m_groupSize);
  
  auto combs = combgen.next();
  if (combs.second == false){
    return HypoJetVector{};
  }
  
  HypoJetVector v;
  for(auto i : combs.first){ v.push_back(*(m_jets.begin() + i));}
  
  return HypoJetVector(v);
}
 
std::string CombinationsGrouper::getName() const {
  return "CombinationsGrouper";
}
 
std::string CombinationsGrouper::toString() const {
 
  std::stringstream ss;
 
  ss << "CombinationsGrouper - create all combinations of ";
  ss << "jets of length " ;
  ss << m_groupSize << '\n';
 
  return ss.str();
}