/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_5/src/DataFormats/ParticleFlowCandidate/src/PFCandidate.cc

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#include "DataFormats/ParticleFlowCandidate/interface/PFCandidate.h"
//#include "DataFormats/ParticleFlowReco/interface/PFBlock.h"

#include "DataFormats/MuonReco/interface/Muon.h"
#include "DataFormats/GsfTrackReco/interface/GsfTrack.h"
#include "DataFormats/ParticleFlowReco/interface/PFDisplacedVertex.h"
#include "DataFormats/ParticleFlowCandidate/interface/PFCandidateElectronExtra.h"
#include "DataFormats/ParticleFlowCandidate/interface/PFCandidatePhotonExtra.h"
#include "DataFormats/ParticleFlowCandidate/interface/PFCandidateEGammaExtra.h"
#include "DataFormats/EgammaCandidates/interface/Conversion.h"
#include "DataFormats/EgammaCandidates/interface/Photon.h"

#include "FWCore/Utilities/interface/Exception.h"

#include <ostream>
#include <iomanip>

using namespace reco;
using namespace std;



const float PFCandidate::bigMva_ = -999.;


#include "DataFormats/ParticleFlowCandidate/src/CountBits.h"




PFCandidate::PFCandidate() : 
  ecalERatio_(1.),
  hcalERatio_(1.),
  hoERatio_(1.),
  rawEcalEnergy_(0.),
  rawHcalEnergy_(0.),
  rawHoEnergy_(0.),
  ps1Energy_(0.),
  ps2Energy_(0.),
  flags_(0), 
  deltaP_(0.), 
  vertexType_(kCandVertex),
  mva_e_pi_(bigMva_),
  mva_e_mu_(bigMva_),
  mva_pi_mu_(bigMva_),
  mva_nothing_gamma_(bigMva_),
  mva_nothing_nh_(bigMva_),
  mva_gamma_nh_(bigMva_),
  getter_(0),storedRefsBitPattern_(0)
{

  muonTrackType_ = reco::Muon::None;
  
  setPdgId( translateTypeToPdgId( X ) );
  refsInfo_.reserve(3);
}


PFCandidate::PFCandidate( const PFCandidatePtr& sourcePtr ) {
  *this = *sourcePtr;
  sourcePtr_ = sourcePtr;

}


PFCandidate::PFCandidate( Charge charge, 
                          const LorentzVector & p4, 
                          ParticleType partId ) : 
  
  CompositeCandidate(charge, p4), 
  ecalERatio_(1.),
  hcalERatio_(1.),
  hoERatio_(1.),
  rawEcalEnergy_(0.),
  rawHcalEnergy_(0.),
  rawHoEnergy_(0.),
  ps1Energy_(0.),
  ps2Energy_(0.),
  flags_(0),
  deltaP_(0.),
  vertexType_(kCandVertex),
  mva_e_pi_(bigMva_),
  mva_e_mu_(bigMva_),
  mva_pi_mu_(bigMva_),
  mva_nothing_gamma_(bigMva_),
  mva_nothing_nh_(bigMva_),
  mva_gamma_nh_(bigMva_),
  getter_(0),storedRefsBitPattern_(0)
{
  refsInfo_.reserve(3);
  blocksStorage_.reserve(10);
  elementsStorage_.reserve(10);

  muonTrackType_ = reco::Muon::None;

  // proceed with various consistency checks

  // charged candidate: track ref and charge must be non null
  if(  partId == h || 
       partId == e || 
       partId == mu ) {
    
    if( charge == 0 ) {
      string err;
      err+="Attempt to construct a charged PFCandidate with a zero charge";
      throw cms::Exception("InconsistentValue",
                           err.c_str() );
    } 
  }
  else {
    if( charge ) { 
      string err;
      err += "Attempt to construct a neutral PFCandidate ";
      err += "with a non-zero charge";
      throw cms::Exception("InconsistentValue",
                           err.c_str() );
    } 
  }  
  setPdgId( translateTypeToPdgId( partId ) );
}

PFCandidate::~PFCandidate() {}

PFCandidate * PFCandidate::clone() const {
  return new PFCandidate( * this );
}


void PFCandidate::addElementInBlock( const reco::PFBlockRef& blockref,
                                     unsigned elementIndex ) {
  //elementsInBlocks_.push_back( make_pair(blockref.key(), elementIndex) );
  if (blocksStorage_.size()==0)
    blocksStorage_ =Blocks(blockref.id());
  blocksStorage_.push_back(blockref);
  elementsStorage_.push_back(elementIndex);
}



PFCandidate::ParticleType PFCandidate::translatePdgIdToType(int pdgid) const {
  switch (std::abs(pdgid)) {
  case 211: return h;
  case 11: return e;
  case 13: return mu;
  case 22: return gamma;
  case 130: return h0;
  case 1: return h_HF;
  case 2: return egamma_HF;
  case 0: return X;  
  default: return X;
  }
}

int PFCandidate::translateTypeToPdgId( ParticleType type ) const {
  
  int thecharge = charge();

  switch( type ) {
  case h:     return thecharge*211; // pi+
  case e:     return thecharge*(-11);
  case mu:    return thecharge*(-13);
  case gamma: return 22;
  case h0:    return 130; // K_L0
  case h_HF:         return 1; // dummy pdg code 
  case egamma_HF:    return 2;  // dummy pdg code
  case X: 
  default:    return 0;  
  }
}


void PFCandidate::setParticleType( ParticleType type ) {
  setPdgId( translateTypeToPdgId( type ) );
}


bool PFCandidate::overlap(const reco::Candidate & other) const {
    CandidatePtr myPtr = sourceCandidatePtr(0);
    if (myPtr.isNull()) return false;
    for (size_t i = 0, n = other.numberOfSourceCandidatePtrs(); i < n; ++i) {
        CandidatePtr otherPtr = other.sourceCandidatePtr(i);
        if ((otherPtr == myPtr) || 
            (sourcePtr_.isNonnull() && otherPtr.isNonnull() && sourcePtr_->overlap(*otherPtr))) {
                return true;
        }
    }
    return false;
}





void PFCandidate::rescaleMomentum( double rescaleFactor ) {
  LorentzVector rescaledp4 = p4();
  rescaledp4 *= rescaleFactor;
  setP4( rescaledp4 );
}


void PFCandidate::setFlag(Flags theFlag, bool value) {
  
  if(value)
    flags_ = flags_ | (1<<theFlag);
  else 
    flags_ = flags_ ^ (1<<theFlag);
}



bool PFCandidate::flag(Flags theFlag) const {

  return (flags_>>theFlag) & 1;
}




ostream& reco::operator<<(ostream& out, 
                          const PFCandidate& c ) {
  
  if(!out) return out;
  
  out<<"\tPFCandidate type: "<<c.particleId();
  out<<setiosflags(ios::right);
  out<<setiosflags(ios::fixed);
  out<<setprecision(3);
  out<<" E/pT/eta/phi " 
     <<c.energy()<<"/"
     <<c.pt()<<"/"
     <<c.eta()<<"/"
     <<c.phi();
  if( c.flag( PFCandidate::T_FROM_DISP ) ) out<<", T_FROM_DISP" << endl;
  else if( c.flag( PFCandidate::T_TO_DISP ) ) out<<", T_TO_DISP" << endl;
  else if( c.flag( PFCandidate::T_FROM_GAMMACONV ) ) out<<", T_FROM_GAMMACONV" << endl;
  else if( c.flag( PFCandidate::GAMMA_TO_GAMMACONV ) ) out<<", GAMMA_TO_GAMMACONV" << endl;
  
  out<<", blocks/iele: ";
  
  PFCandidate::ElementsInBlocks eleInBlocks = c.elementsInBlocks();
  for(unsigned i=0; i<eleInBlocks.size(); i++) {
    PFBlockRef blockRef = eleInBlocks[i].first;
    unsigned indexInBlock = eleInBlocks[i].second;
    
    out<<"("<<blockRef.key()<<"|"<<indexInBlock<<"), ";
  }

  out<<" source:"<<c.sourcePtr_.id()<<"/"<<c.sourcePtr_.key();

//   PFBlockRef blockRef = c.block(); 
//   int blockid = blockRef.key(); 
//   const edm::OwnVector< reco::PFBlockElement >& elements = c.elements();
//   out<< "\t# of elements " << elements.size() 
//      <<" from block " << blockid << endl;

//   // print each element in turn
  
//   for(unsigned ie=0; ie<elements.size(); ie++) {
//     out<<"\t"<< elements[ie] <<endl;
//   }

  // Improved printout for electrons if PFCandidateElectronExtra is available
  if(c.particleId()==PFCandidate::e && c.electronExtraRef().isNonnull() && c.electronExtraRef().isAvailable()) {
    out << std::endl << *(c.electronExtraRef()) ;
  }
  out<<resetiosflags(ios::right|ios::fixed);
  return out;
}

static unsigned long long bitPackRefInfo(const edm::RefCore& iCore, size_t iIndex){
  unsigned long long bitPack = iIndex;
  bitPack |= static_cast<unsigned long long>(iCore.id().productIndex())<<32;
  bitPack |= static_cast<unsigned long long>(iCore.id().processIndex())<<48;
  return bitPack;
}

void PFCandidate::storeRefInfo(unsigned int iMask, 
                               unsigned int iBit, 
                               bool iIsValid, 
                               const edm::RefCore& iCore, 
                               size_t iKey, 
                               const edm::EDProductGetter* iGetter) {

  size_t index = s_refsBefore[storedRefsBitPattern_ & iMask];
  if ( 0 == getter_) {
    getter_ = iGetter;
  }

  if(iIsValid) {
    if(0 == (storedRefsBitPattern_ & iBit) ) {
      refsInfo_.insert(refsInfo_.begin()+index, bitPackRefInfo(iCore,iKey));
      if (iGetter==0)
        refsCollectionCache_.insert(refsCollectionCache_.begin()+index,
                                    (void*)iCore.productPtr());
      else
        refsCollectionCache_.insert(refsCollectionCache_.begin()+index,0);
    } else {
      assert(refsInfo_.size()>index);
      *(refsInfo_.begin()+index)=bitPackRefInfo(iCore,iKey);
      if (iGetter==0)
        *(refsCollectionCache_.begin()+index)=(void*)iCore.productPtr();
      else
        *(refsCollectionCache_.begin()+index)=0;

    }
    storedRefsBitPattern_ |= iBit;
  } else{
    if( storedRefsBitPattern_ & iBit) {
      refsInfo_.erase(refsInfo_.begin()+index);
      refsCollectionCache_.erase(refsCollectionCache_.begin()+index);
      storedRefsBitPattern_ ^= iBit;
    }
  }

}

bool PFCandidate::getRefInfo(unsigned int iMask, unsigned int iBit, 
                             edm::ProductID& oProductID, size_t& oIndex, size_t& aIndex) const {

  if( 0 == (iBit & storedRefsBitPattern_) ) {
    return false;
  }
  aIndex = s_refsBefore[storedRefsBitPattern_ & iMask];
  unsigned long long bitPacked = refsInfo_[aIndex];
  oIndex = bitPacked & 0xFFFFFFFFULL; //low 32 bits are the index
  unsigned short productIndex = (bitPacked & 0x0000FFFF00000000ULL)>>32;
  unsigned short processIndex = (bitPacked & 0xFFFF000000000000ULL)>>48;
  oProductID = edm::ProductID(processIndex,productIndex);
  return true;
}

void PFCandidate::setTrackRef(const reco::TrackRef& iRef) {
  if(!charge()) {
    string err;
    err += "PFCandidate::setTrackRef: this is a neutral candidate! ";
    err += "particleId_=";
    char num[4];
    sprintf( num, "%d", particleId());
    err += num;
    
    throw cms::Exception("InconsistentReference",
                         err.c_str() );
  }

  storeRefInfo(kRefTrackMask, kRefTrackBit, iRef.isNonnull(), 
               iRef.refCore(), iRef.key(),iRef.productGetter());
}

reco::TrackRef PFCandidate::trackRef() const { GETREF(reco::Track, kRefTrackMask, kRefTrackBit); }


void PFCandidate::setMuonRef(reco::MuonRef const & iRef) {

    if(  trackRef() != iRef->track() ) {
    string err;
    err += "PFCandidate::setMuonRef: inconsistent track references!";
    
    throw cms::Exception("InconsistentReference",
                         err.c_str() );
   }

  storeRefInfo(kRefMuonMask, kRefMuonBit, iRef.isNonnull(), 
               iRef.refCore(), iRef.key(),iRef.productGetter());
}

reco::MuonRef PFCandidate::muonRef() const { GETREF(reco::Muon, kRefMuonMask, kRefMuonBit); }


void PFCandidate::setGsfTrackRef(reco::GsfTrackRef const & iRef) {
//  Removed by F. Beaudette. Would like to be able to save the GsfTrackRef even for charged pions
//  if( particleId() != e ) {
//    string err;
//    err += "PFCandidate::setGsfTrackRef: this is not an electron ! particleId_=";
//    char num[4];
//    sprintf( num, "%d", particleId());
//    err += num;
//
//    throw cms::Exception("InconsistentReference",
//                         err.c_str() );
//  }

  storeRefInfo(kRefGsfTrackMask, kRefGsfTrackBit, iRef.isNonnull(), 
               iRef.refCore(), iRef.key(),iRef.productGetter());
}

reco::GsfTrackRef PFCandidate::gsfTrackRef() const { GETREF(reco::GsfTrack, kRefGsfTrackMask, kRefGsfTrackBit); }


void PFCandidate::setDisplacedVertexRef(const reco::PFDisplacedVertexRef& iRef, Flags type) {

  if( particleId() != h ) {
    string err;
    err += "PFCandidate::setDisplacedVertexRef: this is not a hadron! particleId_=";
    char num[4];
    sprintf( num, "%d", particleId());
    err += num;

    throw cms::Exception("InconsistentReference",
                         err.c_str() );
  }
  else if(  !flag( T_FROM_DISP ) && !flag( T_TO_DISP ) ) {
    string err;
    err += "PFCandidate::setDisplacedVertexRef: particule flag is neither T_FROM_DISP nor T_TO_DISP";

    throw cms::Exception("InconsistentReference",
                         err.c_str() );
  }


  if (type == T_TO_DISP && flag( T_TO_DISP )) 
    storeRefInfo(kRefDisplacedVertexDauMask, kRefDisplacedVertexDauBit, 
                 iRef.isNonnull(), 
                 iRef.refCore(), iRef.key(),iRef.productGetter());
  else if (type == T_FROM_DISP && flag( T_FROM_DISP )) 
    storeRefInfo(kRefDisplacedVertexMotMask, kRefDisplacedVertexMotBit, 
                 iRef.isNonnull(), 
                 iRef.refCore(), iRef.key(),iRef.productGetter());
  else if ( (type == T_FROM_DISP && !flag( T_FROM_DISP )) 
            || 
            (type == T_TO_DISP && !flag( T_TO_DISP )) ){
    string err;
    err += "PFCandidate::setDisplacedVertexRef: particule flag is not switched on";

    throw cms::Exception("InconsistentReference",
                         err.c_str() );
  }

}




reco::PFDisplacedVertexRef PFCandidate::displacedVertexRef(Flags type) const {
  if (type == T_TO_DISP) {
    GETREF(reco::PFDisplacedVertex, kRefDisplacedVertexDauMask, kRefDisplacedVertexDauBit); 
  }
  else if (type == T_FROM_DISP) {
    GETREF(reco::PFDisplacedVertex, kRefDisplacedVertexMotMask, kRefDisplacedVertexMotBit); 
  }
  return reco::PFDisplacedVertexRef();
}

void PFCandidate::setConversionRef(reco::ConversionRef const & iRef) {
  if( particleId() != gamma ) {
    string err;
    err += "PFCandidate::setConversionRef: this is not a (converted) photon ! particleId_=";
    char num[4];
    sprintf( num, "%d", particleId());
    err += num;

    throw cms::Exception("InconsistentReference",
                         err.c_str() );
  }
  else if(  !flag( GAMMA_TO_GAMMACONV ) ) {
    string err;
    err += "PFCandidate::setConversionRef: particule flag is not GAMMA_TO_GAMMACONV";

    throw cms::Exception("InconsistentReference",
                         err.c_str() );
  }

  storeRefInfo(kRefConversionMask, kRefConversionBit, iRef.isNonnull(), 
               iRef.refCore(), iRef.key(),iRef.productGetter());
}


reco::ConversionRef PFCandidate::conversionRef() const {
    GETREF(reco::Conversion, kRefConversionMask, kRefConversionBit); 
}

void PFCandidate::setV0Ref(reco::VertexCompositeCandidateRef const & iRef) {
  storeRefInfo(kRefV0Mask, kRefV0Bit, iRef.isNonnull(), 
               iRef.refCore(), iRef.key(),iRef.productGetter());
}

reco::VertexCompositeCandidateRef PFCandidate::v0Ref() const {
  GETREF(reco::VertexCompositeCandidate, kRefV0Mask, kRefV0Bit); 
}

void PFCandidate::setGsfElectronRef(reco::GsfElectronRef const & iRef) {
  storeRefInfo(kRefGsfElectronMask, kRefGsfElectronBit, iRef.isNonnull(), 
               iRef.refCore(), iRef.key(),iRef.productGetter());
}

reco::GsfElectronRef PFCandidate::gsfElectronRef() const {
  GETREF(reco::GsfElectron, kRefGsfElectronMask, kRefGsfElectronBit); 
}

void PFCandidate::setPFElectronExtraRef(reco::PFCandidateElectronExtraRef const & iRef) {
  storeRefInfo(kRefPFElectronExtraMask, kRefPFElectronExtraBit, iRef.isNonnull(), 
               iRef.refCore(), iRef.key(),iRef.productGetter());
}

reco::PFCandidateElectronExtraRef PFCandidate::electronExtraRef() const {
  GETREF(reco::PFCandidateElectronExtra, kRefPFElectronExtraMask, kRefPFElectronExtraBit); 
}

reco::PhotonRef PFCandidate::photonRef() const {
  GETREF(reco::Photon, kRefPhotonMask, kRefPhotonBit); 
}

reco::PFCandidatePhotonExtraRef PFCandidate::photonExtraRef() const {
  GETREF(reco::PFCandidatePhotonExtra, kRefPFPhotonExtraMask, kRefPFPhotonExtraBit); 
}

reco::PFCandidateEGammaExtraRef PFCandidate::egammaExtraRef() const {
 GETREF(reco::PFCandidateEGammaExtra, kRefPFEGammaExtraMask, kRefPFEGammaExtraBit); 
}

reco::SuperClusterRef PFCandidate::superClusterRef() const {
  GETREF(reco::SuperCluster, kRefSuperClusterMask, kRefSuperClusterBit); 
}

void PFCandidate::setPhotonRef(const reco::PhotonRef& iRef) {
  if( particleId() != gamma && particleId() != e) {
    string err;
    err += "PFCandidate::setSuperClusterRef: this is not an electron neither a photon ! particleId_=";
    char num[4];
    sprintf( num, "%d", particleId());
    err += num;
    
    throw cms::Exception("InconsistentReference", err.c_str() );
  }

  storeRefInfo(kRefPhotonMask, kRefPhotonBit, iRef.isNonnull(), 
               iRef.refCore(), iRef.key(),iRef.productGetter());

}

void PFCandidate::setSuperClusterRef(const reco::SuperClusterRef& iRef) {
  if( particleId() != gamma && particleId() != e) {
    string err;
    err += "PFCandidate::setSuperClusterRef: this is not an electron neither a photon ! particleId_=";
    char num[4];
    sprintf( num, "%d", particleId());
    err += num;
    
    throw cms::Exception("InconsistentReference", err.c_str() );
  }

  storeRefInfo(kRefSuperClusterMask, kRefSuperClusterBit, iRef.isNonnull(), 
               iRef.refCore(), iRef.key(),iRef.productGetter());

}

void PFCandidate::setPFPhotonExtraRef(const reco::PFCandidatePhotonExtraRef& iRef) {
  storeRefInfo(kRefPFPhotonExtraMask, kRefPFPhotonExtraBit, iRef.isNonnull(), 
               iRef.refCore(), iRef.key(),iRef.productGetter());
}

void PFCandidate::setPFEGammaExtraRef(const reco::PFCandidateEGammaExtraRef & iRef) {
  //std::cout << " before storeRefInfo " << kRefPFEGammaExtraMask << " " <<  kRefPFEGammaExtraBit << " " <<  iRef.isNonnull() << " " <<  iRef.key() <<  " " << std::endl;
  storeRefInfo(kRefPFEGammaExtraMask, kRefPFEGammaExtraBit, iRef.isNonnull(), 
               iRef.refCore(), iRef.key(),iRef.productGetter());
}

const math::XYZPoint & PFCandidate::vertex() const {
  switch (vertexType_) {
  case kCandVertex:
    return vertex_;
    break;
  case kTrkVertex:
    return trackRef()->vertex();
    break;
  case kComMuonVertex:
    return muonRef()->combinedMuon()->vertex();
    break;
  case kSAMuonVertex:
    return muonRef()->standAloneMuon()->vertex();
    break;
  case kTrkMuonVertex:
    return muonRef()->track()->vertex();
    break;
  case kTPFMSMuonVertex:
    return muonRef()->tpfmsTrack()->vertex();
    break;
  case kPickyMuonVertex:
    return muonRef()->pickyTrack()->vertex();
    break;

  case kGSFVertex:
    return gsfTrackRef()->vertex();
    break;
  }
  return vertex_;
}