HLTEventSelector.cc

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#include "PhysicsTools/RecoUtils/plugins/HLTEventSelector.h"

#include "FWCore/MessageLogger/interface/MessageLogger.h"

#include "FWCore/Common/interface/TriggerNames.h"

HLTEventSelector::HLTEventSelector(const edm::ParameterSet& pset, edm::ConsumesCollector& iC) {
  // input collection
  triggerResults_ = pset.getParameter<edm::InputTag>("triggerResults");
  triggerResultsToken_ = iC.consumes<edm::TriggerResults>(triggerResults_);
  // trigger path names
  pathNames_ = pset.getParameter<std::vector<std::string> >("pathNames");

  edm::LogInfo("HLTEventSelector") << "constructed with \n"
                                   << "  src = " << triggerResults_ << "\n"
                                   << "  #pathnames = " << pathNames_.size();
}

bool HLTEventSelector::select(const edm::Event& event) const {
  //
  // get the trigger results and check validity
  //
  edm::Handle<edm::TriggerResults> hltHandle;
  event.getByToken(triggerResultsToken_, hltHandle);
  if (!hltHandle.isValid()) {
    edm::LogWarning("HLTEventSelector") << "No trigger results for InputTag " << triggerResults_;
    return false;
  }
  //
  // get results
  //
  const edm::TriggerNames& trgNames = event.triggerNames(*hltHandle);
  unsigned int trgSize = trgNames.size();
  //   static int first(true);
  //   if ( first ) {
  //     first = false;
  //     std::cout << "Trigger menu" << std::endl;
  //     for ( unsigned int i=0; i<trgSize; ++i ) {
  //       std::cout << trgNames.triggerName(i) << std::endl;
  //     }
  //   }
  //
  // example for OR of all specified triggers
  //
  for (std::vector<std::string>::const_iterator i = pathNames_.begin(); i != pathNames_.end(); ++i) {
    // get index
    unsigned int index = trgNames.triggerIndex(*i);
    if (index == trgSize) {
      edm::LogWarning("HLTEventSelector") << "Unknown trigger name " << *i;
      //       return false;
      continue;
    }
    //     if ( !hltHandle->accept(index) )  return false;
    if (hltHandle->accept(index)) {
      LogDebug("HLTEventSelector") << "Event selected by " << *i;
      return true;
    }
  }
  //   return true;
  LogDebug("HLTEventSelector") << "Event rejected";
  return false;
}