rawEnergy.h

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#include <cstdint>
#ifndef RecoLocalCalo_HcalRecAlgos_rawEnergy_h
#define RecoLocalCalo_HcalRecAlgos_rawEnergy_h

namespace HcalRecAlgosPrivate {
  template <typename T>
  class IsClassType {
    typedef char One;
    typedef struct {
      char a[2];
    } Two;
    template <typename C>
    static One test(int C::*);
    template <typename C>
    static Two test(...);

  public:
    enum { value = sizeof(IsClassType<T>::template test<T>(nullptr)) == 1 };
  };

  template <typename T>
  class HasRawEnergySetterHelper {
  private:
    template <void (T::*)(float)>
    struct tester;
    typedef char One;
    typedef struct {
      char a[2];
    } Two;
    template <typename C>
    static One test(tester<&C::setRawEnergy>*);
    template <typename C>
    static Two test(...);

  public:
    enum { value = sizeof(HasRawEnergySetterHelper<T>::template test<T>(nullptr)) == 1 };
  };

  template <typename T, bool is_class_type = IsClassType<T>::value>
  struct HasRawEnergySetter {
    enum { value = false };
  };

  template <typename T>
  struct HasRawEnergySetter<T, true> {
    enum { value = HasRawEnergySetterHelper<T>::value };
  };

  template <typename T, bool>
  struct RawEnergySetter {
    inline static void setRawEnergy(T&, float) {}
  };

  template <typename T>
  struct RawEnergySetter<T, true> {
    inline static void setRawEnergy(T& h, float e) { h.setRawEnergy(e); }
  };

  template <typename T>
  class HasRawEnergyGetterHelper {
  private:
    template <float (T::*)() const>
    struct tester;
    typedef char One;
    typedef struct {
      char a[2];
    } Two;
    template <typename C>
    static One test(tester<&C::eraw>*);
    template <typename C>
    static Two test(...);

  public:
    enum { value = sizeof(HasRawEnergyGetterHelper<T>::template test<T>(0)) == 1 };
  };

  template <typename T, bool is_class_type = IsClassType<T>::value>
  struct HasRawEnergyGetter {
    enum { value = false };
  };

  template <typename T>
  struct HasRawEnergyGetter<T, true> {
    enum { value = HasRawEnergyGetterHelper<T>::value };
  };

  template <typename T, bool>
  struct RawEnergyGetter {
    inline static float getRawEnergy(const T&, float v) { return v; }
  };

  template <typename T>
  struct RawEnergyGetter<T, true> {
    inline static float getRawEnergy(const T& h, float) { return h.eraw(); }
  };

  template <typename T>
  class HasAuxEnergySetterHelper {
  private:
    template <void (T::*)(float)>
    struct tester;
    typedef char One;
    typedef struct {
      char a[2];
    } Two;
    template <typename C>
    static One test(tester<&C::setAuxEnergy>*);
    template <typename C>
    static Two test(...);

  public:
    enum { value = sizeof(HasAuxEnergySetterHelper<T>::template test<T>(nullptr)) == 1 };
  };

  template <typename T, bool is_class_type = IsClassType<T>::value>
  struct HasAuxEnergySetter {
    enum { value = false };
  };

  template <typename T>
  struct HasAuxEnergySetter<T, true> {
    enum { value = HasAuxEnergySetterHelper<T>::value };
  };

  template <typename T, bool>
  struct AuxEnergySetter {
    inline static void setAuxEnergy(T&, float) {}
  };

  template <typename T>
  struct AuxEnergySetter<T, true> {
    inline static void setAuxEnergy(T& h, float e) { h.setAuxEnergy(e); }
  };

  template <typename T>
  class HasAuxEnergyGetterHelper {
  private:
    template <float (T::*)() const>
    struct tester;
    typedef char One;
    typedef struct {
      char a[2];
    } Two;
    template <typename C>
    static One test(tester<&C::eaux>*);
    template <typename C>
    static Two test(...);

  public:
    enum { value = sizeof(HasAuxEnergyGetterHelper<T>::template test<T>(0)) == 1 };
  };

  template <typename T, bool is_class_type = IsClassType<T>::value>
  struct HasAuxEnergyGetter {
    enum { value = false };
  };

  template <typename T>
  struct HasAuxEnergyGetter<T, true> {
    enum { value = HasAuxEnergyGetterHelper<T>::value };
  };

  template <typename T, bool>
  struct AuxEnergyGetter {
    inline static float getAuxEnergy(const T&, float v) { return v; }
  };

  template <typename T>
  struct AuxEnergyGetter<T, true> {
    inline static float getAuxEnergy(const T& h, float) { return h.eaux(); }
  };

  template <typename T>
  class HasAuxRecHitGetterHelper {
  private:
    template <uint32_t (T::*)() const>
    struct tester;
    typedef char One;
    typedef struct {
      char a[2];
    } Two;
    template <typename C>
    static One test(tester<&C::auxHBHE>*);
    template <typename C>
    static Two test(...);

  public:
    enum { value = sizeof(HasAuxRecHitGetterHelper<T>::template test<T>(0)) == 1 };
  };

  template <typename T, bool is_class_type = IsClassType<T>::value>
  struct HasAuxRecHitGetter {
    enum { value = false };
  };

  template <typename T>
  struct HasAuxRecHitGetter<T, true> {
    enum { value = HasAuxRecHitGetterHelper<T>::value };
  };

  template <typename T, bool>
  struct AuxRecHitGetter {
    inline static uint32_t getAuxRecHit(const T&, uint32_t v) { return v; }
  };

  template <typename T>
  struct AuxRecHitGetter<T, true> {
    inline static uint32_t getAuxRecHit(const T& h, uint32_t) { return h.auxHBHE(); }
  };
}  // namespace HcalRecAlgosPrivate

// Function for setting the raw energy in a code templated
// upon the rechit type. The function call will be ignored
// in case the HcalRecHit type does not have a member function
// "void setRawEnergy(float)".
template <typename HcalRecHit>
inline void setRawEnergy(HcalRecHit& h, float e) {
  HcalRecAlgosPrivate::RawEnergySetter<HcalRecHit,
                                       HcalRecAlgosPrivate::HasRawEnergySetter<HcalRecHit>::value>::setRawEnergy(h, e);
}

// Function for getting the raw energy in a code templated
// upon the rechit type. This function will return "valueIfNoSuchMember"
// in case the HcalRecHit type does not have a member function
// "float eraw() const".
template <typename HcalRecHit>
inline float getRawEnergy(const HcalRecHit& h, float valueIfNoSuchMember = -1.0e20) {
  return HcalRecAlgosPrivate::RawEnergyGetter<HcalRecHit, HcalRecAlgosPrivate::HasRawEnergyGetter<HcalRecHit>::value>::
      getRawEnergy(h, valueIfNoSuchMember);
}

// Similar functions for aux energy
template <typename HcalRecHit>
inline void setAuxEnergy(HcalRecHit& h, float e) {
  HcalRecAlgosPrivate::AuxEnergySetter<HcalRecHit,
                                       HcalRecAlgosPrivate::HasAuxEnergySetter<HcalRecHit>::value>::setAuxEnergy(h, e);
}

template <typename HcalRecHit>
inline float getAuxEnergy(const HcalRecHit& h, float valueIfNoSuchMember = -1.0e20) {
  return HcalRecAlgosPrivate::AuxEnergyGetter<HcalRecHit, HcalRecAlgosPrivate::HasAuxEnergyGetter<HcalRecHit>::value>::
      getAuxEnergy(h, valueIfNoSuchMember);
}

// Function for getting the auxiliary word in a code templated
// upon the rechit type. This function will return "valueIfNoSuchMember"
// in case the HcalRecHit type does not have a member function
// "uint32_t auxHBHE() const".
template <typename HcalRecHit>
inline uint32_t getAuxRecHitWord(const HcalRecHit& h, uint32_t valueIfNoSuchMember = 4294967295U) {
  return HcalRecAlgosPrivate::AuxRecHitGetter<HcalRecHit, HcalRecAlgosPrivate::HasAuxRecHitGetter<HcalRecHit>::value>::
      getAuxRecHit(h, valueIfNoSuchMember);
}

#endif  // RecoLocalCalo_HcalRecAlgos_rawEnergy_h