RangeFilter.cxx

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/*
  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
*/
 
#include <algorithm>
 
#include "./RangeFilter.h"
#include "./HypoJetPreds.h"  // HypoJetPtGreater
 
 
RangeFilter::RangeFilter(std::size_t begin, std::size_t end):
  m_begin(begin), m_end(end) {
  if (begin > end) {throw std::out_of_range("RangeFilter begin > end");}
  m_nToSort = end;
}
 
 
HypoJetVector
RangeFilter::filter(const HypoJetVector& jv,
            const std::unique_ptr<ITrigJetHypoInfoCollector>&) const {
 
  if (m_nToSort > jv.size()) {// too few jets
    return HypoJetVector();
  }
 
  auto filtered = HypoJetVector(jv.cbegin(), jv.cend());
 
  std::partial_sort(filtered.begin(),
            filtered.begin() + m_end,
            filtered.end(),
            HypoJetPtGreater());
 
  return HypoJetVector(filtered.begin() + m_begin,
               filtered.begin() + m_end);
}
 
std::string RangeFilter::toString() const {
  std::stringstream ss;
  const void* address = static_cast<const void*>(this);
  ss << "RangeFilter: (" << address << ") "
     << "begin "<< m_begin << " end " << m_end << '\n';
  return ss.str();
}
 
 
std::ostream& operator<<(std::ostream& os, const RangeFilter& cf){
  os << cf.toString();
  return os;
}