/data/refman/pasoursint/CMSSW_6_1_2_SLHC2/src/CommonTools/ParticleFlow/interface/PFCandidateWithSrcPtrFactory.h

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#ifndef CommonTools_ParticleFlow_PFCandidateWithSrcPtrFactor_h
#define CommonTools_ParticleFlow_PFCandidateWithSrcPtrFactor_h

#include "DataFormats/ParticleFlowCandidate/interface/PFCandidate.h"
#include "DataFormats/ParticleFlowCandidate/interface/PFCandidateFwd.h"

namespace reco {
  class PFCandidateWithSrcPtrFactory : public std::unary_function<reco::PFCandidate, edm::FwdPtr<reco::PFCandidate> > {
  public :
    reco::PFCandidate operator()( edm::FwdPtr<reco::PFCandidate> const & input ) const {
      reco::PFCandidate output( *input );
      /* really, what's the point in this ? The one below should be enough
      //and the one loop here is a torture of converting Ptr<PFCandidate> to Ptr<Candidate> and back
      for ( unsigned int isource = 0; isource < input->numberOfSourceCandidatePtrs(); ++isource ) {
        edm::Ptr<reco::PFCandidate> ptr (input->sourceCandidatePtr(isource) );
        output.setSourceCandidatePtr( ptr );
      }
      */
      output.setSourceCandidatePtr( input.backPtr() );
      return output; 
    }
  };
}

#endif