BOSS_7.0.2: /home/bes3soft/bes3soft/Boss/7.0.2/dist/7.0.2/Generator/GeneratorObject/GeneratorObject-00-01-05/src/HepMcParticleLink.cxx Source File

00001 #include "GeneratorObject/HepMcParticleLink.h"
00002 #include "GeneratorObject/McEventCollection.h"
00003 #include "StoreGate/StoreGate.h"
00004 #include "CLHEP/HepMC/GenParticle.h"
00005 #include "CLHEP/HepMC/GenEvent.h"
00006 #include <cassert>
00007 
00008 HepMcParticleLink::HepMcParticleLink(const HepMC::GenParticle* part, 
00009                                      index_type eventIndex) :
00010     m_particle(const_cast<HepMC::GenParticle*>(part)), 
00011     m_extBarcode((0 != part) ? part->barcode() : 0, eventIndex) {
00012   assert(part);
00013 }
00014 
00015 const HepMC::GenParticle* HepMcParticleLink::cptr() const {
00016   if (!m_particle) {
00017     const McEventCollection* pEvtColl;
00018     if ((StoreGate::instance().retrieve(pEvtColl)).isSuccess()) { //FIXME SLOW
00019       m_particle = pEvtColl->at(eventIndex())->barcode_to_particle(barcode());
00020     }
00021   }
00022   return m_particle;
00023 }