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//                        Kokkos v. 3.4
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#ifndef __KOKKOSBATCHED_IDENTITY_HPP__
#define __KOKKOSBATCHED_IDENTITY_HPP__

/// \author Kim Liegeois (knliege@sandia.gov)

#include "KokkosBatched_Util.hpp"

#include "KokkosBatched_Copy_Decl.hpp"

namespace KokkosBatched {

/// \brief Batched Identity Operator:

class Identity {
 public:
  KOKKOS_INLINE_FUNCTION
  Identity() {}

  KOKKOS_INLINE_FUNCTION
  ~Identity() {}

  template <typename MemberType, typename XViewType, typename YViewType,
            typename ArgTrans, typename ArgMode, int sameXY>
  KOKKOS_INLINE_FUNCTION void apply(const MemberType &member,
                                    const XViewType &X,
                                    const YViewType &Y) const {
    if (sameXY == 0) {
      if (std::is_same<ArgMode, KokkosBatched::Mode::Serial>::value) {
        SerialCopy<Trans::NoTranspose>::invoke(X, Y);
      } else if (std::is_same<ArgMode, KokkosBatched::Mode::Team>::value) {
        TeamCopy<MemberType>::invoke(member, X, Y);
      } else if (std::is_same<ArgMode,
                              KokkosBatched::Mode::TeamVector>::value) {
        TeamVectorCopy<MemberType>::invoke(member, X, Y);
      }
    }
  }
};

}  // namespace KokkosBatched

#endif