#include <HepMCFileReader.h>

Public Member Functions
HepMC::GenEvent *	fillCurrentEventData ()

virtual void	getStatsFromTuple (int &mo1, int &mo2, int &da1, int &da2, int &status, int &pid, int j) const

virtual void	initialize (const std::string &filename)

bool	isInitialized () const

void	printEvent () const

virtual bool	printHepMcEvent () const

virtual bool	readCurrentEvent ()

virtual void	ReadStats ()

virtual bool	setEvent (int event)

virtual	~HepMCFileReader ()

Static Public Member Functions
static HepMCFileReader *	instance ()

Protected Member Functions
	HepMCFileReader ()

Private Member Functions
int	find_in_map (const std::map< HepMC::GenParticle , int > &m, HepMC::GenParticle p) const

int	rdstate () const

Private Attributes
HepMC::GenEvent *	evt_

std::vector< HepMC::GenParticle * >	index_to_particle

HepMC::IO_BaseClass *	input_

std::map< HepMC::GenParticle *, int >	particle_to_index

Static Private Attributes
static HepMCFileReader *	instance_ =0

Detailed Description

This class is used by the implementation of DaqEventFactory present in this package to read in the full event raw data from a flat binary file. WARNING: If you want to use this class for other purposes you must always invoke the method initialize before starting using the interface it exposes.

Author: G. Bruno - CERN, EP Division

Definition at line 28 of file HepMCFileReader.h.

Constructor & Destructor Documentation

HepMCFileReader::HepMCFileReader ( )

protected

Definition at line 42 of file HepMCFileReader.cc.

References instance_.

                                  :
   evt_(0), input_(0)
 { 
   // Default constructor.
   if (instance_ == 0) {
     instance_ = this;  
   } else {
     edm::LogError("HepMCFileReader") << "Constructing a new instance";
   }
 } 

HepMCFileReader::~HepMCFileReader ( )

virtual

Definition at line 55 of file HepMCFileReader.cc.

References input_, and instance_.

 {
   edm::LogInfo("HepMCFileReader") << "Destructing HepMCFileReader";
   
   instance_=0;    
   delete input_;
 }

Member Function Documentation

HepMC::GenEvent * HepMCFileReader::fillCurrentEventData ( )

Definition at line 128 of file HepMCFileReader.cc.

References evt_, and readCurrentEvent().

Referenced by edm::MCFileSource::setRunAndEventInfo().

 {
   readCurrentEvent();
   return evt_;
 }

int HepMCFileReader::find_in_map	(	const std::map< HepMC::GenParticle *, int > &	m,
		HepMC::GenParticle *	p
	)		const

private

Definition at line 286 of file HepMCFileReader.cc.

Referenced by getStatsFromTuple().

 {
   std::map<HepMC::GenParticle*,int>::const_iterator iter = m.find(p);
   return (iter == m.end()) ? 0 : iter->second;
 }

void HepMCFileReader::getStatsFromTuple	(	int &	mo1,
		int &	mo2,
		int &	da1,
		int &	da2,
		int &	status,
		int &	pid,
		int	j
	)		const

virtual

Definition at line 235 of file HepMCFileReader.cc.

References gather_cfg::cout, evt_, find_in_map(), index_to_particle, j, and particle_to_index.

Referenced by printEvent().

 {
   if (!evt_) {
     cout <<  "HepMCFileReader: Got no event :-(  Game over already  ?" <<endl; 
   } else {
     status =  index_to_particle[j]->status();
     pid = index_to_particle[j]->pdg_id();
     if ( index_to_particle[j]->production_vertex() ) {
       
           //HepLorentzVector p = index_to_particle[j]->
           //production_vertex()->position();
       
       int num_mothers = index_to_particle[j]->production_vertex()->
       particles_in_size();
       int first_mother = find_in_map( particle_to_index,
       *(index_to_particle[j]->
       production_vertex()->
       particles_in_const_begin()));
       int last_mother = first_mother + num_mothers - 1;
       if ( first_mother == 0 ) last_mother = 0;
       mo1=first_mother;
       mo2=last_mother;
     } else {
       mo1 =0;
       mo2 =0;
     }   
     if (!index_to_particle[j]->end_vertex()) {
       //find # of 1. daughter
       int first_daughter = find_in_map( particle_to_index,
       *(index_to_particle[j]->end_vertex()->particles_begin(HepMC::children)));
       //cout <<"first_daughter "<< first_daughter <<  "num_daughters " << num_daughters << endl; 
       HepMC::GenVertex::particle_iterator ic;
       int last_daughter=0;
       //find # of last daughter
       for (ic = index_to_particle[j]->end_vertex()->particles_begin(HepMC::children);
       ic != index_to_particle[j]->end_vertex()->particles_end(HepMC::children); ++ic) 
       last_daughter= find_in_map( particle_to_index,*ic);       
       
       if (first_daughter== 0) last_daughter = 0;
       da1=first_daughter;
       da2=last_daughter;
     } else {
       da1=0;
       da2=0;
     }
   } 
 } 

void HepMCFileReader::initialize ( const std::string & filename )

virtual

Definition at line 65 of file HepMCFileReader.cc.

References Exception, recoMuon::in, input_, isInitialized(), and rdstate().

Referenced by edm::MCFileSource::MCFileSource().

 {
   if (isInitialized()) {
     edm::LogError("HepMCFileReader") << "Was already initialized... reinitializing";
     delete input_;
   }
 
   edm::LogInfo("HepMCFileReader") << "Opening file" << filename << "using HepMC::IO_GenEvent";
   input_ = new HepMC::IO_GenEvent(filename.c_str(), std::ios::in);
 
   if (rdstate() == std::ios::failbit) {
     throw cms::Exception("FileNotFound", "HepMCFileReader::initialize()")
       << "File " << filename << " was not found.\n";
   }
 }

HepMCFileReader * HepMCFileReader::instance ( )

static

Definition at line 30 of file HepMCFileReader.cc.

 {
   // Implement a HepMCFileReader singleton.
 
   if (instance_== 0) {
     instance_ = new HepMCFileReader();
   }
   return instance_;
 }

bool HepMCFileReader::isInitialized ( ) const

inline

Definition at line 73 of file HepMCFileReader.h.

References input_.

Referenced by initialize().

 {
   return input_ != 0;
 }

void HepMCFileReader::printEvent ( ) const

Definition at line 137 of file HepMCFileReader.cc.

References gather_cfg::cout, evt_, g, GenParticle::GenParticle, getStatsFromTuple(), index_to_particle, gen::n, sysUtil::pid, mathSSE::sqrt(), and ntuplemaker::status.

                                        {
   int mo1=0,mo2=0,da1=0,da2=0,status=0,pid=0;   
   if (evt_ != 0) {   
     cout << "---#-------pid--st---Mo1---Mo2---Da1---Da2------px------py------pz-------E-";
     cout << "------m---------x---------y---------z---------t-";
     cout << endl;
     cout.setf(ios::right, ios::adjustfield);
     for(int n=1; n<=evt_->particles_size(); n++) {  
       HepMC::GenParticle *g = index_to_particle[n];  
       getStatsFromTuple( mo1,mo2,da1,da2,status,pid,n);
       cout << setw(4) << n
       << setw(8) << pid
       << setw(5) << status
       << setw(6) << mo1    
       << setw(6) << mo2
       << setw(6) << da1
       << setw(6) << da2;
       cout.setf(ios::fixed, ios::floatfield);
       cout.setf(ios::right, ios::adjustfield);
       cout << setw(10) << setprecision(2) << g->momentum().x();
       cout << setw(8) << setprecision(2) << g->momentum().y();
       cout << setw(10) << setprecision(2) << g->momentum().z();
       cout << setw(8) << setprecision(2) << g->momentum().t();
       cout << setw(8) << setprecision(2) << g->generatedMass();       
       // tau=L/(gamma*beta*c) 
       if (g->production_vertex() != 0 && g->end_vertex() != 0 && status == 2) {
         cout << setw(10) << setprecision(2) <<g->production_vertex()->position().x();
         cout << setw(10) << setprecision(2) <<g->production_vertex()->position().y();
         cout << setw(10) << setprecision(2) <<g->production_vertex()->position().z();
         
         double xm = g->production_vertex()->position().x();
         double ym = g->production_vertex()->position().y();
         double zm = g->production_vertex()->position().z();
         double xd = g->end_vertex()->position().x();
         double yd = g->end_vertex()->position().y();
         double zd = g->end_vertex()->position().z();
         double decl = sqrt((xd-xm)*(xd-xm)+(yd-ym)*(yd-ym)+(zd-zm)*(zd-zm));
         double labTime = decl/c_light;
         // convert lab time to proper time
         double properTime =  labTime/g->momentum().rho()*(g->generatedMass() );
         // set the proper time in nanoseconds
         cout << setw(8) << setprecision(2) <<properTime;
       }
       else{
         cout << setw(10) << setprecision(2) << 0.0;
         cout << setw(10) << setprecision(2) << 0.0;
         cout << setw(10) << setprecision(2) << 0.0;
         cout << setw(8) << setprecision(2) << 0.0;  
       }
       cout << endl; 
     }
   } else {
     cout << " HepMCFileReader: No event available !" << endl;
   }
 }

bool HepMCFileReader::printHepMcEvent ( ) const

virtual

Definition at line 120 of file HepMCFileReader.cc.

References evt_.

 {
   if (evt_ != 0) evt_->print(); 
   return true;
 }

int HepMCFileReader::rdstate ( ) const

private

Definition at line 83 of file HepMCFileReader.cc.

References input_, and AlCaHLTBitMon_ParallelJobs::p.

Referenced by initialize().

 {
   // work around a HepMC IO_ inheritence shortfall
 
   HepMC::IO_GenEvent *p = dynamic_cast<HepMC::IO_GenEvent*>(input_);
   if (p) return p->rdstate();
 
   return std::ios::failbit;
 }

bool HepMCFileReader::readCurrentEvent ( )

virtual

Definition at line 95 of file HepMCFileReader.cc.

References evt_, input_, and ReadStats().

Referenced by fillCurrentEventData().

 {
   evt_ = input_->read_next_event();
   if (evt_) { 
     edm::LogInfo("HepMCFileReader") << "| --- Event Nr. "  << evt_->event_number()
          << " with " << evt_->particles_size() << " particles --- !";  
     ReadStats();
     //  printHepMcEvent();
     //          printEvent();
   } else {
     edm::LogInfo("HepMCFileReader") << "Got no event" <<endl;
   }
 
   return evt_ != 0;
 }

void HepMCFileReader::ReadStats ( )

virtual

Definition at line 195 of file HepMCFileReader.cc.

References evt_, index_to_particle, p1, p2, particle_to_index, and findQualityFiles::v.

Referenced by readCurrentEvent().

 {
   unsigned int particle_counter=0;
   index_to_particle.reserve(evt_->particles_size()+1); 
   index_to_particle[0] = 0; 
   for (HepMC::GenEvent::vertex_const_iterator v = evt_->vertices_begin();
        v != evt_->vertices_end(); ++v ) {
     // making a list of incoming particles of the vertices
     // so that the mother indices in HEPEVT can be filled properly
     for (HepMC::GenVertex::particles_in_const_iterator p1 = (*v)->particles_in_const_begin();
          p1 != (*v)->particles_in_const_end(); ++p1 ) {
       ++particle_counter;
       //particle_counter can be very large for heavy ions
       if(particle_counter >= index_to_particle.size() ) {
         //make it large enough to hold up to this index
          index_to_particle.resize(particle_counter+1);
       }                 
       index_to_particle[particle_counter] = *p1;
       particle_to_index[*p1] = particle_counter;
     }   
     // daughters are entered only if they aren't a mother of
     // another vertex
     for (HepMC::GenVertex::particles_out_const_iterator p2 = (*v)->particles_out_const_begin();
          p2 != (*v)->particles_out_const_end(); ++p2) {
       if (!(*p2)->end_vertex()) {
         ++particle_counter;
         //particle_counter can be very large for heavy ions
         if(particle_counter  >= index_to_particle.size() ) {        
           //make it large enough to hold up to this index
           index_to_particle.resize(particle_counter+1);
         }                   
         index_to_particle[particle_counter] = *p2;
         particle_to_index[*p2] = particle_counter;
       }
     }
   } 
 }