getRef.h

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#ifndef DataFormats_Common_getRef_h
#define DataFormats_Common_getRef_h
/* \function edm::getRef(...)
 *
 * \author Luca Lista, INFN
 *
 */
#include "DataFormats/Common/interface/Ref.h"
#include "DataFormats/Common/interface/View.h"
#include "DataFormats/Common/interface/Handle.h"

namespace edm {
  namespace helper {
    template <typename C>
    struct MatcherGetRef {
      typedef Ref<C> ref_type;
      static ref_type getRef(const Handle<C>& c, size_t k) { return ref_type(c, k); }
    };

    template <typename T>
    struct MatcherGetRef<View<T> > {
      typedef RefToBase<T> ref_type;
      static ref_type getRef(const Handle<View<T> >& v, size_t k) { return v->refAt(k); }
    };
  }  // namespace helper

  template <typename C>
  typename helper::MatcherGetRef<C>::ref_type getRef(const Handle<C>& c, size_t k) {
    return helper::MatcherGetRef<C>::getRef(c, k);
  }
}  // namespace edm

#endif