#ifndef CommonTools_ParticleFlow_PFCandidateSelectorDefinition
#define CommonTools_ParticleFlow_PFCandidateSelectorDefinition

#include "DataFormats/ParticleFlowCandidate/interface/PFCandidateFwd.h"
#include "DataFormats/ParticleFlowCandidate/interface/PFCandidate.h"
#include "boost/iterator/transform_iterator.hpp"

namespace pf2pat {

  class PFCandidateSelectorDefinition {
  public:
    typedef reco::PFCandidateCollection collection;
    typedef edm::Handle<collection> HandleToCollection;
    typedef std::vector<reco::PFCandidate> container;

    struct Pointer {
      const reco::PFCandidate* operator()(const reco::PFCandidate& c) const { return &c; }
    };

    typedef boost::transform_iterator<Pointer, container::const_iterator> const_iterator;

    PFCandidateSelectorDefinition() {}

    const_iterator begin() const { return const_iterator(selected_.begin()); }

    const_iterator end() const { return const_iterator(selected_.end()); }

    size_t size() const { return selected_.size(); }

    const container& selected() const { return selected_; }

  protected:
    container selected_;
  };
}  // namespace pf2pat

#endif