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#ifndef CommonTools_ParticleFlow_PFCandidateFwdPtrFactory_h
#define CommonTools_ParticleFlow_PFCandidateFwdPtrFactory_h
/**
\class reco::PFCandidateFwdPtrFactory PFCandidateFwdPtrFactory.h "CommonTools/ParticleFlow/interface/PFCandidateFwdPtrFactory.h"
\brief Creates a FwdPtr<PFCandidate> from an input PFCandidate. If the PFCandidate has a valid sourceCandidatePtr, that is
used for the FwdPtr's "backPtr".
\author Salvatore Rappoccio
*/
#include "DataFormats/ParticleFlowCandidate/interface/PFCandidate.h"
#include "DataFormats/ParticleFlowCandidate/interface/PFCandidateFwd.h"
namespace reco {
struct PFCandidateFwdPtrFactory {
edm::FwdPtr<reco::PFCandidate> operator()(edm::View<reco::PFCandidate> const& view, unsigned int i) const {
edm::Ptr<reco::PFCandidate> ptr = view.ptrAt(i);
edm::Ptr<reco::PFCandidate> backPtr = ptr;
if (ptr.isNonnull() && ptr.isAvailable() && ptr->numberOfSourceCandidatePtrs() > 0) {
edm::Ptr<reco::Candidate> basePtr = ptr->sourceCandidatePtr(0);
if (basePtr.isNonnull() && basePtr.isAvailable())
backPtr = edm::Ptr<reco::PFCandidate>(basePtr); //this cast works only for available stuff
}
return edm::FwdPtr<reco::PFCandidate>(ptr, backPtr);
}
};
} // namespace reco
#endif
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