VersionedIdProducer.h

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// system include files
#include <memory>

// user include files
#include "FWCore/Framework/interface/Frameworkfwd.h"
#include "FWCore/Framework/interface/stream/EDProducer.h"

#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/MakerMacros.h"

#include "FWCore/ParameterSet/interface/ParameterSet.h"

#include "DataFormats/Common/interface/View.h"

#include "PhysicsTools/SelectorUtils/interface/VersionedSelector.h"

#include <memory>
#include <sstream>

template< class PhysicsObjectPtr , class SelectorType=VersionedSelector<PhysicsObjectPtr> >
class VersionedIdProducer : public edm::stream::EDProducer<> {
public:
  using PhysicsObjectType =  typename PhysicsObjectPtr::value_type;

  using Collection =  edm::View<PhysicsObjectType>;
  using TokenType = edm::EDGetTokenT<Collection>;

  explicit VersionedIdProducer(const edm::ParameterSet&);
  ~VersionedIdProducer() {}
  
  virtual void produce(edm::Event&, const edm::EventSetup&) override;

private:  
  // ----------member data ---------------------------
  bool verbose_;
  TokenType physicsObjectSrc_;
    
  std::vector<std::unique_ptr<SelectorType> > ids_;  
};

//
// constants, enums and typedefs
//

//
// static data member definitions
//

//
// constructors and destructor
//
template< class PhysicsObjectPtr , class SelectorType >
VersionedIdProducer<PhysicsObjectPtr,SelectorType>::
VersionedIdProducer(const edm::ParameterSet& iConfig) {
  verbose_ = iConfig.getUntrackedParameter<bool>("verbose", false);
  
  physicsObjectSrc_ = 
    consumes<Collection>(iConfig.getParameter<edm::InputTag>("physicsObjectSrc"));
  
  const std::vector<edm::ParameterSet>& ids = 
    iConfig.getParameterSetVector("physicsObjectIDs");
  for(const auto& id : ids ) {    
    const std::string& idMD5 = 
      id.getParameter<std::string>("idMD5");
    const edm::ParameterSet& the_id = 
      id.getParameterSet("idDefinition");
    const std::string& idname =
      the_id.getParameter<std::string>("idName");
    std::string calculated_md5;
    ids_.emplace_back( new SelectorType(the_id) );
    calculated_md5 = ids_.back()->md5String();
    ids_.back()->setConsumes(consumesCollector());
    if( ids_.back()->cutFlowSize() == 0 ) {
      throw cms::Exception("InvalidCutFlow")
    << "Post-processing cutflow size is zero! You may have configured"
    << " the python incorrectly!";
    }

    if( idMD5 != calculated_md5 ) {
      edm::LogError("IdConfigurationNotValidated")
    << "The expected md5: " << idMD5 << " does not match the md5\n"
    << "calculated by the ID: " << calculated_md5 << " please\n"
    << "update your python configuration or determine the source\n"
    << "of transcription error!";
    }

    std::stringstream idmsg;

    // dump whatever information about the ID we have     
    idmsg << "Instantiated ID: " << idname << std::endl
      << "with MD5 hash: " << idMD5 << std::endl;
    const bool isPOGApproved = 
      id.getUntrackedParameter<bool>("isPOGApproved",false);
    if( isPOGApproved ) {
      idmsg << "This ID is POG approved!" << std::endl;
    } else {
      idmsg << "This ID is not POG approved and likely under development!!!\n"
        << "Please make sure to report your progress with this ID "
        << "at the next relevant POG meeting." << std::endl;
    }

    edm::LogWarning("IdInformation")
      << idmsg.str();

    produces<std::string>(idname);
    produces<edm::ValueMap<bool> >(idname);
    produces<edm::ValueMap<float> >(idname); // for PAT
    produces<edm::ValueMap<unsigned> >(idname);
  }
}

template< class PhysicsObjectPtr , class SelectorType >
void VersionedIdProducer<PhysicsObjectPtr,SelectorType>::
produce(edm::Event& iEvent, const edm::EventSetup& iSetup) {
  edm::Handle<Collection> physicsObjectsHandle;
  iEvent.getByToken(physicsObjectSrc_,physicsObjectsHandle);

  const Collection& physicsobjects = *physicsObjectsHandle;

  for( const auto& id : ids_ ) {
    std::auto_ptr<edm::ValueMap<bool> > outPass(new edm::ValueMap<bool>() );
    std::auto_ptr<edm::ValueMap<float> > outPassf(new edm::ValueMap<float>() );
    std::auto_ptr<edm::ValueMap<unsigned> > outHowFar(new edm::ValueMap<unsigned>() );
    std::vector<bool> passfail;
    std::vector<float> passfailf;
    std::vector<unsigned> howfar;
    for(const auto& po : physicsobjects.ptrVector()) {
      passfail.push_back((*id)(po,iEvent));
      passfailf.push_back(passfail.back());
      howfar.push_back(id->howFarInCutFlow());
    }
    
    edm::ValueMap<bool>::Filler fillerpassfail(*outPass);
    fillerpassfail.insert(physicsObjectsHandle, passfail.begin(), passfail.end());
    fillerpassfail.fill();
    
    edm::ValueMap<float>::Filler fillerpassfailf(*outPassf);
    fillerpassfailf.insert(physicsObjectsHandle, passfailf.begin(), passfailf.end());
    fillerpassfailf.fill();

    edm::ValueMap<unsigned>::Filler fillerhowfar(*outHowFar);
    fillerhowfar.insert(physicsObjectsHandle, howfar.begin(), howfar.end() );
    fillerhowfar.fill();  
    
    iEvent.put(outPass,id->name());
    iEvent.put(outPassf,id->name());
    iEvent.put(outHowFar,id->name());
    iEvent.put(std::auto_ptr<std::string>(new std::string(id->md5String())),
           id->name());
  }   
}