/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_5/src/TopQuarkAnalysis/TopKinFitter/plugins/TtFullHadKinFitProducer.cc

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#include "TopQuarkAnalysis/TopKinFitter/plugins/TtFullHadKinFitProducer.h"

static const unsigned int nPartons=6;

TtFullHadKinFitProducer::TtFullHadKinFitProducer(const edm::ParameterSet& cfg):
  jets_                       (cfg.getParameter<edm::InputTag>("jets")),
  match_                      (cfg.getParameter<edm::InputTag>("match")),
  useOnlyMatch_               (cfg.getParameter<bool>("useOnlyMatch")),
  bTagAlgo_                   (cfg.getParameter<std::string>("bTagAlgo")),
  minBTagValueBJet_           (cfg.getParameter<double>("minBTagValueBJet")),
  maxBTagValueNonBJet_        (cfg.getParameter<double>("maxBTagValueNonBJet")),
  useBTagging_                (cfg.getParameter<bool>("useBTagging")),
  bTags_                      (cfg.getParameter<unsigned int>("bTags")),
  jetCorrectionLevel_         (cfg.getParameter<std::string>("jetCorrectionLevel")),
  maxNJets_                   (cfg.getParameter<int>("maxNJets")),
  maxNComb_                   (cfg.getParameter<int>("maxNComb")),
  maxNrIter_                  (cfg.getParameter<unsigned int>("maxNrIter")),
  maxDeltaS_                  (cfg.getParameter<double>("maxDeltaS")),
  maxF_                       (cfg.getParameter<double>("maxF")),
  jetParam_                   (cfg.getParameter<unsigned>("jetParametrisation")),
  constraints_                (cfg.getParameter<std::vector<unsigned> >("constraints")),
  mW_                         (cfg.getParameter<double>("mW"  )),
  mTop_                       (cfg.getParameter<double>("mTop")),
  jetEnergyResolutionScaleFactors_(cfg.getParameter<std::vector<double> >("jetEnergyResolutionScaleFactors")),
  jetEnergyResolutionEtaBinning_  (cfg.getParameter<std::vector<double> >("jetEnergyResolutionEtaBinning"))
{
  if(cfg.exists("udscResolutions") && cfg.exists("bResolutions")){
    udscResolutions_ = cfg.getParameter <std::vector<edm::ParameterSet> >("udscResolutions");
    bResolutions_    = cfg.getParameter <std::vector<edm::ParameterSet> >("bResolutions");
  }
  else if(cfg.exists("udscResolutions") || cfg.exists("bResolutions")){
    if(cfg.exists("udscResolutions")) throw cms::Exception("Configuration") << "Parameter 'bResolutions' is needed if parameter 'udscResolutions' is defined!\n";
    else                              throw cms::Exception("Configuration") << "Parameter 'udscResolutions' is needed if parameter 'bResolutions' is defined!\n";
  }

  // define kinematic fit interface
  kinFitter = new TtFullHadKinFitter::KinFit(useBTagging_, bTags_, bTagAlgo_, minBTagValueBJet_, maxBTagValueNonBJet_,
                                             udscResolutions_, bResolutions_, jetEnergyResolutionScaleFactors_, 
                                             jetEnergyResolutionEtaBinning_, jetCorrectionLevel_, maxNJets_, maxNComb_,
                                             maxNrIter_, maxDeltaS_, maxF_, jetParam_, constraints_, mW_, mTop_);

  // produces the following collections
  produces< std::vector<pat::Particle> >("PartonsB");
  produces< std::vector<pat::Particle> >("PartonsBBar");
  produces< std::vector<pat::Particle> >("PartonsLightQ");
  produces< std::vector<pat::Particle> >("PartonsLightQBar");
  produces< std::vector<pat::Particle> >("PartonsLightP");
  produces< std::vector<pat::Particle> >("PartonsLightPBar");

  produces< std::vector<std::vector<int> > >();
  produces< std::vector<double> >("Chi2");
  produces< std::vector<double> >("Prob");
  produces< std::vector<int> >("Status");
}

TtFullHadKinFitProducer::~TtFullHadKinFitProducer()
{
  delete kinFitter;
}

void 
TtFullHadKinFitProducer::produce(edm::Event& event, const edm::EventSetup& setup)
{
  // get jet collection
  edm::Handle<std::vector<pat::Jet> > jets;
  event.getByLabel(jets_, jets);

  // get match in case that useOnlyMatch_ is true
  std::vector<int> match;
  bool invalidMatch=false;
  if(useOnlyMatch_) {
    kinFitter->setUseOnlyMatch(true);
    // in case that only a ceratin match should be used, get match here
    edm::Handle<std::vector<std::vector<int> > > matches;
    event.getByLabel(match_, matches);
    match = *(matches->begin());
    // check if match is valid
    if( match.size()!=nPartons ){
      invalidMatch=true;
    }
    else {
      for(unsigned int idx=0; idx<match.size(); ++idx) {
        if(match[idx]<0 || match[idx]>=(int)jets->size()) {
          invalidMatch=true;
          break;
        }
      }
    }
    kinFitter->setMatch(match);
  }

  kinFitter->setMatchInvalidity(invalidMatch);

  std::list<TtFullHadKinFitter::KinFitResult> fitResults = kinFitter->fit(*jets);

  // pointer for output collections
  std::auto_ptr< std::vector<pat::Particle> > pPartonsB( new std::vector<pat::Particle> );
  std::auto_ptr< std::vector<pat::Particle> > pPartonsBBar( new std::vector<pat::Particle> );
  std::auto_ptr< std::vector<pat::Particle> > pPartonsLightQ   ( new std::vector<pat::Particle> );
  std::auto_ptr< std::vector<pat::Particle> > pPartonsLightQBar( new std::vector<pat::Particle> );
  std::auto_ptr< std::vector<pat::Particle> > pPartonsLightP   ( new std::vector<pat::Particle> );
  std::auto_ptr< std::vector<pat::Particle> > pPartonsLightPBar( new std::vector<pat::Particle> );
  // pointer for meta information
  std::auto_ptr< std::vector<std::vector<int> > > pCombi ( new std::vector<std::vector<int> > );
  std::auto_ptr< std::vector<double> > pChi2  ( new std::vector<double> );
  std::auto_ptr< std::vector<double> > pProb  ( new std::vector<double> );
  std::auto_ptr< std::vector<int> > pStatus( new std::vector<int> );

  unsigned int iComb = 0;
  for(std::list<TtFullHadKinFitter::KinFitResult>::const_iterator res = fitResults.begin(); res != fitResults.end(); ++res){
    if(maxNComb_>=1 && iComb==(unsigned int)maxNComb_){ 
      break;
    }
    ++iComb;

    pPartonsB        ->push_back( res->B         );
    pPartonsBBar     ->push_back( res->BBar      );
    pPartonsLightQ   ->push_back( res->LightQ    );
    pPartonsLightQBar->push_back( res->LightQBar );
    pPartonsLightP   ->push_back( res->LightP    );
    pPartonsLightPBar->push_back( res->LightPBar );

    pCombi ->push_back( res->JetCombi );
    pChi2  ->push_back( res->Chi2     );
    pProb  ->push_back( res->Prob     );
    pStatus->push_back( res->Status   );

  }

  event.put(pCombi);
  event.put(pPartonsB        , "PartonsB"        );
  event.put(pPartonsBBar     , "PartonsBBar"     );
  event.put(pPartonsLightQ   , "PartonsLightQ"   );
  event.put(pPartonsLightQBar, "PartonsLightQBar");
  event.put(pPartonsLightP   , "PartonsLightP"   );
  event.put(pPartonsLightPBar, "PartonsLightPBar");
  event.put(pChi2   , "Chi2"   );
  event.put(pProb   , "Prob"   );
  event.put(pStatus , "Status" );
}

#include "FWCore/Framework/interface/MakerMacros.h"
DEFINE_FWK_MODULE(TtFullHadKinFitProducer);