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// $Id: FillerMCEventInfo.cc,v 1.15 2010/01/04 20:16:39 loizides Exp $
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#include "MitProd/TreeFiller/interface/FillerMCEventInfo.h"
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#include "SimDataFormats/GeneratorProducts/interface/HepMCProduct.h"
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#include "SimDataFormats/GeneratorProducts/interface/GenEventInfoProduct.h"
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#include "MitAna/DataTree/interface/Names.h"
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#include "MitAna/DataTree/interface/MCEventInfo.h"
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#include "MitProd/ObjectService/interface/ObjectService.h"
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#include "DataFormats/HepMCCandidate/interface/FlavorHistory.h"
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#include "DataFormats/HepMCCandidate/interface/FlavorHistoryEvent.h"
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#include "PhysicsTools/HepMCCandAlgos/interface/FlavorHistoryProducer.h"
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using namespace std;
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using namespace edm;
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using namespace mithep;
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//--------------------------------------------------------------------------------------------------
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FillerMCEventInfo::FillerMCEventInfo(const ParameterSet &cfg, const char *name, bool active) :
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BaseFiller(cfg,"MCEventInfo",active),
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evtName_(Conf().getUntrackedParameter<string>("evtName",Names::gkMCEvtInfoBrn)),
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genHepMCEvName_(Conf().getUntrackedParameter<string>("genHepMCEventEdmName","generator")),
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genEvtInfoName_(Conf().getUntrackedParameter<string>("genEvtInfoEdmName","generator")),
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flavorHistoryActive_(Conf().getUntrackedParameter<bool>("flavorHistoryActive",false)),
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flavorHistName_(Conf().getUntrackedParameter<string>("flavorHistEdmName","flavorHistoryFilter")),
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eventInfo_(new MCEventInfo())
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{
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// Constructor.
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}
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//--------------------------------------------------------------------------------------------------
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FillerMCEventInfo::~FillerMCEventInfo()
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{
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// Destructor.
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delete eventInfo_;
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}
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//--------------------------------------------------------------------------------------------------
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void FillerMCEventInfo::BookDataBlock(TreeWriter &tws)
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{
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// Book our branch.
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tws.AddBranch(evtName_,&eventInfo_);
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OS()->add<mithep::MCEventInfo>(eventInfo_,evtName_);
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}
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//--------------------------------------------------------------------------------------------------
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void FillerMCEventInfo::FillDataBlock(const edm::Event &event,
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const edm::EventSetup &setup)
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{
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// Fill our data structures.
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if (event.isRealData()) {
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PrintErrorAndExit("Expected monte-carlo record, but did not get it. Aborting.");
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}
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Handle<GenEventInfoProduct> hEvtInfo;
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if (genEvtInfoName_.empty() || !GetProductSafe(genEvtInfoName_, hEvtInfo, event)) {
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// fall back to hepmc if requested
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if (!genHepMCEvName_.empty()) {
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Handle<edm::HepMCProduct> hHepMCProduct;
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GetProduct(genHepMCEvName_, hHepMCProduct, event);
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const HepMC::GenEvent *genEvt = hHepMCProduct->GetEvent();
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eventInfo_->SetScale(genEvt->event_scale());
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eventInfo_->SetProcessId(genEvt->signal_process_id());
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HepMC::WeightContainer wc = genEvt->weights();
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Double_t weight = 0;
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for (int i = 0; i< wc.size(); ++i)
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weight *= wc[i];
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eventInfo_->SetWeight(weight);
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const HepMC::PdfInfo *genPdfInfo = genEvt->pdf_info();
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if (genPdfInfo) {
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eventInfo_->SetId1(genPdfInfo->id1());
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eventInfo_->SetId2(genPdfInfo->id2());
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eventInfo_->SetPdf1(genPdfInfo->pdf1());
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eventInfo_->SetPdf2(genPdfInfo->pdf2());
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eventInfo_->SetScalePdf(genPdfInfo->scalePDF());
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eventInfo_->SetX1(genPdfInfo->x1());
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eventInfo_->SetX2(genPdfInfo->x2());
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}
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}
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} else {
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// use event info product
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eventInfo_->SetScale(hEvtInfo->qScale());
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eventInfo_->SetProcessId(hEvtInfo->signalProcessID());
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eventInfo_->SetWeight(hEvtInfo->weight());
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if (hEvtInfo->hasPDF()) {
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const gen::PdfInfo *pdf = hEvtInfo->pdf();
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eventInfo_->SetId1(pdf->id.first);
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eventInfo_->SetId2(pdf->id.second);
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eventInfo_->SetPdf1(pdf->xPDF.first);
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eventInfo_->SetPdf2(pdf->xPDF.second);
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eventInfo_->SetScalePdf(pdf->scalePDF);
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eventInfo_->SetX1(pdf->x.first);
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eventInfo_->SetX2(pdf->x.second);
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}
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}
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// fill flavor history path if requested
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if (flavorHistoryActive_) {
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Handle<unsigned int> flavorHistoryPath;
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GetProduct(flavorHistName_, flavorHistoryPath, event);
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eventInfo_->SetFlavorHistoryPath(*flavorHistoryPath);
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}
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}
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