HLTVertexPerformanceAnalyzer.cc

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#include "HLTriggerOffline/Btag/interface/HLTVertexPerformanceAnalyzer.h"

HLTVertexPerformanceAnalyzer::HLTVertexPerformanceAnalyzer(const edm::ParameterSet& iConfig)
{
    hlTriggerResults_           = consumes<TriggerResults>(iConfig.getParameter<InputTag> ("TriggerResults"));
    VertexCollection_           =   edm::vector_transform(iConfig.getParameter<std::vector<edm::InputTag> >( "Vertex" ), [this](edm::InputTag const & tag){return mayConsume< reco::VertexCollection>(tag);});
    hltPathNames_               = iConfig.getParameter< std::vector<std::string> > ("HLTPathNames");
    simVertexCollection_ = consumes<std::vector<SimVertex> >(edm::InputTag("g4SimHits"));

    EDConsumerBase::labelsForToken(hlTriggerResults_,label);
    hlTriggerResults_Label = label.module;
    
    for(unsigned int i=0; i<VertexCollection_.size() ; i++){
        EDConsumerBase::labelsForToken(VertexCollection_[i],label);
        VertexCollection_Label.push_back(label.module);
    }
}


HLTVertexPerformanceAnalyzer::~HLTVertexPerformanceAnalyzer()
{
}


void HLTVertexPerformanceAnalyzer::dqmBeginRun(const edm::Run& iRun, const edm::EventSetup& iSetup) {
    triggerConfChanged_ = true;
    EDConsumerBase::labelsForToken(hlTriggerResults_,label);
    
    hltConfigProvider_.init(iRun, iSetup, label.process, triggerConfChanged_);
    const std::vector< std::string > & allHltPathNames = hltConfigProvider_.triggerNames();

    //fill hltPathIndexs_ with the trigger number of each hltPathNames_
    for ( size_t trgs=0; trgs<hltPathNames_.size(); trgs++) {
        unsigned int found = 1;
        int it_mem = -1;
        for (size_t it=0 ; it < allHltPathNames.size() ; ++it )
        {
            found = allHltPathNames.at(it).find(hltPathNames_[trgs]);
            if ( found == 0 )
            {
                it_mem= (int) it;
            }
        }//for allallHltPathNames
        hltPathIndexs_.push_back(it_mem);
    }//for hltPathNames_
    
    //fill _isfoundHLTs for each hltPathNames_
    for ( size_t trgs=0; trgs<hltPathNames_.size(); trgs++) {
        if ( hltPathIndexs_[trgs] < 0 ) {
            _isfoundHLTs.push_back(false);
        } 
        else {
            _isfoundHLTs.push_back(true);
        }
    }
}


void HLTVertexPerformanceAnalyzer::analyze(const edm::Event& iEvent, const edm::EventSetup& iSetup)
{
    bool trigRes=false;
    using namespace edm;

    //get triggerResults
    Handle<TriggerResults> TriggerResulsHandler;
    Exception excp(errors::LogicError);
    if ( hlTriggerResults_Label == "" || hlTriggerResults_Label == "NULL" ) {
        excp << "TriggerResults ==> Empty";
        excp.raise();
    }
    try {
        iEvent.getByToken(hlTriggerResults_, TriggerResulsHandler);
        if (TriggerResulsHandler.isValid())   trigRes=true;
    }  catch (...) { }
    if ( !trigRes ) {    excp << "TriggerResults ==> not readable";            excp.raise(); }
    const TriggerResults & triggerResults = *(TriggerResulsHandler.product());

    //get simVertex
    float simPV=0;

    Handle<std::vector<SimVertex> > simVertexCollection;
    
    try {
        iEvent.getByToken(simVertexCollection_, simVertexCollection);
        const SimVertex simPVh = *(simVertexCollection->begin());
        simPV=simPVh.position().z();
    }
    catch (...) {}
    
    //fill the DQM plot
    Handle<VertexCollection> VertexHandler;
    for (unsigned int ind=0; ind<hltPathNames_.size();ind++) {
        for (unsigned int coll=0; coll<VertexCollection_.size();coll++) {
            bool VertexOK=false;
            if ( !_isfoundHLTs[ind]) continue;  //if the hltPath is not in the event, skip the event
            if ( !triggerResults.accept(hltPathIndexs_[ind]) ) continue;    //if the hltPath was not accepted skip the event
            
            //get the recoVertex
            if (VertexCollection_Label.at(coll) != "" && VertexCollection_Label.at(coll) != "NULL" )
            {
                try {
                    iEvent.getByToken(VertexCollection_.at(coll), VertexHandler);
                    if (VertexHandler.isValid())   VertexOK=true;                       
                }  catch (...) { }          
            }
            
            //calculate the variable (RecoVertex - SimVertex)
            float value=VertexHandler->begin()->z()-simPV;
            
            //if value is over/under flow, assign the extreme value
            float maxValue=H1_.at(ind)["Vertex_"+VertexCollection_Label.at(coll)]->getTH1F()->GetXaxis()->GetXmax();
            if(value>maxValue)  value=maxValue-0.0001; 
            if(value<-maxValue) value=-maxValue+0.0001; 
            
            //fill the histo
            if (VertexOK) H1_.at(ind)["Vertex_"+VertexCollection_Label.at(coll)] -> Fill(value);
        }// for on VertexCollection_
    }//for on hltPathNames_
}


void HLTVertexPerformanceAnalyzer::bookHistograms(DQMStore::IBooker & ibooker, edm::Run const & iRun,edm::EventSetup const &  iSetup )
{
    //book the DQM plots
    using namespace std;
    std::string dqmFolder;
    for (unsigned int ind=0; ind<hltPathNames_.size();ind++) {
        dqmFolder = Form("HLT/BTag/Vertex/%s",hltPathNames_[ind].c_str());
        H1_.push_back(std::map<std::string, MonitorElement *>());
        ibooker.setCurrentFolder(dqmFolder);
        for (unsigned int coll=0; coll<VertexCollection_.size();coll++) {
            float maxValue = 0.02;
            if(VertexCollection_Label.at(coll)==("hltFastPrimaryVertex")) maxValue = 2.; //for the hltFastPrimaryVertex use a larger scale (res ~ 1 cm)
            float vertexU = maxValue;
            float vertexL = -maxValue;
            int   vertexBins = 100;
            if ( VertexCollection_Label.at(coll) != "" && VertexCollection_Label.at(coll) != "NULL" ) { 
                H1_.back()["Vertex_"+VertexCollection_Label.at(coll)]       = ibooker.book1D("Vertex_"+VertexCollection_Label.at(coll),      VertexCollection_Label.at(coll).c_str(),  vertexBins, vertexL, vertexU );
                H1_.back()["Vertex_"+VertexCollection_Label.at(coll)]      -> setAxisTitle("vertex error (cm)",1);
            }
        }
    }
}

DEFINE_FWK_MODULE(HLTVertexPerformanceAnalyzer);