/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_5_3_14/src/RecoJets/JetAnalyzers/src/JetPlotsExample.cc

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// Implementation of template class: JetPlotsExample
// Description:  Example of simple EDAnalyzer for jets.
// Author: K. Kousouris
// Date:  25 - August - 2008
#include "RecoJets/JetAnalyzers/interface/JetPlotsExample.h"
#include "DataFormats/JetReco/interface/CaloJetCollection.h"
#include "DataFormats/JetReco/interface/PFJetCollection.h"
#include "DataFormats/JetReco/interface/GenJetCollection.h"
#include "DataFormats/JetReco/interface/CaloJet.h"
#include "DataFormats/JetReco/interface/PFJet.h"
#include "DataFormats/JetReco/interface/GenJet.h"
#include "DataFormats/JetReco/interface/JPTJet.h"
#include "DataFormats/JetReco/interface/JPTJetCollection.h"


#include "FWCore/Framework/interface/Event.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include <TFile.h>
#include <cmath>
using namespace edm;
using namespace reco;
using namespace std;
template<class Jet>
JetPlotsExample<Jet>::JetPlotsExample(edm::ParameterSet const& cfg)
{
  JetAlgorithm  = cfg.getParameter<std::string> ("JetAlgorithm"); 
  HistoFileName = cfg.getParameter<std::string> ("HistoFileName");
  NJets         = cfg.getParameter<int> ("NJets");
}
template<class Jet>
void JetPlotsExample<Jet>::beginJob() 
{
  TString hname;
  m_file = new TFile(HistoFileName.c_str(),"RECREATE"); 
  hname = "JetPt";
  m_HistNames1D[hname] = new TH1F(hname,hname,100,0,1000);
  hname = "JetEta";
  m_HistNames1D[hname] = new TH1F(hname,hname,120,-6,6);
  hname = "JetPhi";
  m_HistNames1D[hname] = new TH1F(hname,hname,100,-M_PI,M_PI);
  hname = "NumberOfJets";
  m_HistNames1D[hname] = new TH1F(hname,hname,100,0,100);
}
template<class Jet>
void JetPlotsExample<Jet>::analyze(edm::Event const& evt, edm::EventSetup const& iSetup) 
{
  Handle<JetCollection> jets;
  evt.getByLabel(JetAlgorithm,jets);
  typename JetCollection::const_iterator i_jet;
  int index = 0;
  TString hname; 
  hname = "NumberOfJets";
  FillHist1D(hname,jets->size()); 
  for(i_jet = jets->begin(); i_jet != jets->end() && index < NJets; ++i_jet) 
    {
      hname = "JetPt";
      FillHist1D(hname,i_jet->pt());   
      hname = "JetEta";
      FillHist1D(hname,i_jet->eta());
      hname = "JetPhi";
      FillHist1D(hname,i_jet->phi());
      index++;
    }
}
template<class Jet>
void JetPlotsExample<Jet>::endJob() 
{
  if (m_file !=0) 
    {
      m_file->cd();
      for (std::map<TString, TH1*>::iterator hid = m_HistNames1D.begin(); hid != m_HistNames1D.end(); hid++)
        hid->second->Write();
      delete m_file;
      m_file = 0;      
    }
}
template<class Jet>
void JetPlotsExample<Jet>::FillHist1D(const TString& histName,const Double_t& value) 
{
  std::map<TString, TH1*>::iterator hid=m_HistNames1D.find(histName);
  if (hid==m_HistNames1D.end())
    std::cout << "%fillHist -- Could not find histogram with name: " << histName << std::endl;
  else
    hid->second->Fill(value);
}
#include "FWCore/Framework/interface/MakerMacros.h"
typedef JetPlotsExample<CaloJet> CaloJetPlotsExample;
DEFINE_FWK_MODULE(CaloJetPlotsExample);
typedef JetPlotsExample<GenJet> GenJetPlotsExample;
DEFINE_FWK_MODULE(GenJetPlotsExample);
typedef JetPlotsExample<PFJet> PFJetPlotsExample;
DEFINE_FWK_MODULE(PFJetPlotsExample);
typedef JetPlotsExample<JPTJet> JPTJetPlotsExample;
DEFINE_FWK_MODULE(JPTJetPlotsExample);