ParticleListDrawer.cc

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#include <memory>
#include <string>
#include <iostream>
#include <sstream>

#include "FWCore/Framework/interface/Frameworkfwd.h"
#include "FWCore/Framework/interface/EDAnalyzer.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/EventSetup.h"
#include "FWCore/Framework/interface/MakerMacros.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/Utilities/interface/InputTag.h"
#include "SimGeneral/HepPDTRecord/interface/ParticleDataTable.h"
#include "DataFormats/Candidate/interface/Candidate.h"
#include "DataFormats/Candidate/interface/CandidateFwd.h"
#include "DataFormats/HepMCCandidate/interface/GenParticle.h"
#include "DataFormats/Common/interface/Ref.h"

using namespace std;
using namespace reco;
using namespace edm;

class ParticleListDrawer : public edm::EDAnalyzer {
public:
  explicit ParticleListDrawer(const edm::ParameterSet&);
  ~ParticleListDrawer() override{};
  void analyze(const edm::Event& iEvent, const edm::EventSetup& iSetup) override;

private:
  std::string getParticleName(int id) const;

  edm::InputTag src_;
  edm::EDGetTokenT<reco::CandidateView> srcToken_;
  edm::ESHandle<ParticleDataTable> pdt_;
  int maxEventsToPrint_;  // Must be signed, because -1 is used for no limit
  unsigned int nEventAnalyzed_;
  bool printOnlyHardInteraction_;
  bool printVertex_;
  bool printFlags_;
  bool useMessageLogger_;
};

ParticleListDrawer::ParticleListDrawer(const edm::ParameterSet& pset)
    : src_(pset.getParameter<InputTag>("src")),
      srcToken_(consumes<reco::CandidateView>(src_)),
      maxEventsToPrint_(pset.getUntrackedParameter<int>("maxEventsToPrint", 1)),
      nEventAnalyzed_(0),
      printOnlyHardInteraction_(pset.getUntrackedParameter<bool>("printOnlyHardInteraction", false)),
      printVertex_(pset.getUntrackedParameter<bool>("printVertex", false)),
      printFlags_(pset.getUntrackedParameter<bool>("printFlags", false)),
      useMessageLogger_(pset.getUntrackedParameter<bool>("useMessageLogger", false)) {}

std::string ParticleListDrawer::getParticleName(int id) const {
  const ParticleData* pd = pdt_->particle(id);
  if (!pd) {
    std::ostringstream ss;
    ss << "P" << id;
    return ss.str();
  } else
    return pd->name();
}

void ParticleListDrawer::analyze(const edm::Event& iEvent, const edm::EventSetup& iSetup) {
  Handle<reco::CandidateView> particles;
  iEvent.getByToken(srcToken_, particles);
  iSetup.getData(pdt_);

  if (maxEventsToPrint_ < 0 || nEventAnalyzed_ < static_cast<unsigned int>(maxEventsToPrint_)) {
    ostringstream out;
    char buf[256];

    out << endl << "[ParticleListDrawer] analysing particle collection " << src_.label() << endl;

    snprintf(buf,
             sizeof(buf),
             " idx  |    ID -       Name |Stat|  Mo1  Mo2  Da1  Da2 |nMo nDa|    pt       eta     phi   |     px       "
             "  py         pz        m     |");
    out << buf;
    if (printVertex_) {
      snprintf(buf, sizeof(buf), "        vx       vy        vz     |");
      out << buf;
    }
    out << endl;

    int idx = -1;
    int iMo1 = -1;
    int iMo2 = -1;
    int iDa1 = -1;
    int iDa2 = -1;
    vector<const reco::Candidate*> cands;
    vector<const Candidate*>::const_iterator found = cands.begin();
    for (CandidateView::const_iterator p = particles->begin(); p != particles->end(); ++p) {
      cands.push_back(&*p);
    }

    for (CandidateView::const_iterator p = particles->begin(); p != particles->end(); p++) {
      if (printOnlyHardInteraction_ && p->status() != 3)
        continue;

      // Particle Name
      int id = p->pdgId();
      string particleName = getParticleName(id);

      // Particle Index
      idx = p - particles->begin();

      // Particles Mothers and Daighters
      iMo1 = -1;
      iMo2 = -1;
      iDa1 = -1;
      iDa2 = -1;
      int nMo = p->numberOfMothers();
      int nDa = p->numberOfDaughters();

      found = find(cands.begin(), cands.end(), p->mother(0));
      if (found != cands.end())
        iMo1 = found - cands.begin();

      found = find(cands.begin(), cands.end(), p->mother(nMo - 1));
      if (found != cands.end())
        iMo2 = found - cands.begin();

      found = find(cands.begin(), cands.end(), p->daughter(0));
      if (found != cands.end())
        iDa1 = found - cands.begin();

      found = find(cands.begin(), cands.end(), p->daughter(nDa - 1));
      if (found != cands.end())
        iDa2 = found - cands.begin();

      char buf[2400];
      snprintf(
          buf,
          sizeof(buf),
          " %4d | %5d - %10s | %2d | %4d %4d %4d %4d | %2d %2d | %7.3f %10.3f %6.3f | %10.3f %10.3f %10.3f %8.3f |",
          idx,
          p->pdgId(),
          particleName.c_str(),
          p->status(),
          iMo1,
          iMo2,
          iDa1,
          iDa2,
          nMo,
          nDa,
          p->pt(),
          p->eta(),
          p->phi(),
          p->px(),
          p->py(),
          p->pz(),
          p->mass());
      out << buf;

      if (printVertex_) {
        snprintf(buf, sizeof(buf), " %10.3f %10.3f %10.3f |", p->vertex().x(), p->vertex().y(), p->vertex().z());
        out << buf;
      }

      if (printFlags_) {
        const reco::GenParticle* gp = dynamic_cast<const reco::GenParticle*>(&*p);
        if (!gp)
          throw cms::Exception("Unsupported", "Status flags can be printed only for reco::GenParticle objects\n");
        if (gp->isPromptFinalState())
          out << "  PromptFinalState";
        if (gp->isDirectPromptTauDecayProductFinalState())
          out << "  DirectPromptTauDecayProductFinalState";
        if (gp->isHardProcess())
          out << "  HardProcess";
        if (gp->fromHardProcessFinalState())
          out << "  HardProcessFinalState";
        if (gp->fromHardProcessBeforeFSR())
          out << "  HardProcessBeforeFSR";
        if (gp->statusFlags().isFirstCopy())
          out << "  FirstCopy";
        if (gp->isLastCopy())
          out << "  LastCopy";
        if (gp->isLastCopyBeforeFSR())
          out << "  LastCopyBeforeFSR";
      }

      out << endl;
    }
    nEventAnalyzed_++;

    if (useMessageLogger_)
      LogVerbatim("ParticleListDrawer") << out.str();
    else
      cout << out.str();
  }
}

DEFINE_FWK_MODULE(ParticleListDrawer);