/data/refman/pasoursint/CMSSW_4_1_8_patch9/src/SimG4Core/Notification/src/GenParticleInfoExtractor.cc

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#include "SimG4Core/Notification/interface/GenParticleInfoExtractor.h"
#include "SimG4Core/Notification/interface/SimG4Exception.h"

#include "G4PrimaryParticle.hh"

const GenParticleInfo & 
GenParticleInfoExtractor::operator()(const G4PrimaryParticle * p) const
{
    G4VUserPrimaryParticleInformation * up = p->GetUserInformation();
    if (up == 0) throw SimG4Exception
       ("GenParticleInfoExtractor: G4PrimaryParticle has no user information");
    GenParticleInfo * gpi = dynamic_cast<GenParticleInfo *>(up);
    if (gpi == 0) throw SimG4Exception
       ("User information in G4PrimaryParticle is not of GenParticleInfo type");
    return * gpi;
}