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#ifndef DATAFORMATS_HCALRECHIT_HFPRERECHIT_H
#define DATAFORMATS_HCALRECHIT_HFPRERECHIT_H
#include <utility>
#include "DataFormats/HcalRecHit/interface/HFQIE10Info.h"
/** \class HFPreRecHit
*
* Class to contain the info needed to perform HF reconstruction
* using QIE10 chips and dual-anode readout. Groups the information
* provided by a single PMT.
*/
class HFPreRecHit {
public:
typedef HcalDetId key_type;
constexpr HFPreRecHit() : hasInfo_{false, false} {}
// In the constructor below, either "first" or "second"
// pointer can be nullptr
constexpr HFPreRecHit(const HcalDetId& id, const HFQIE10Info* first, const HFQIE10Info* second)
: id_(id), hasInfo_{false, false} {
if (first) {
hfQIE10Info_[0] = *first;
hasInfo_[0] = true;
}
if (second) {
hfQIE10Info_[1] = *second;
hasInfo_[1] = true;
}
}
constexpr HcalDetId id() const { return id_; }
// Get a pointer to the QIE10 info. nullptr will be returned
// if the info with the given index does not exist or if the
// index is out of range.
constexpr HFQIE10Info const* getHFQIE10Info(unsigned index) const {
if (index < 2 && hasInfo_[index])
return &hfQIE10Info_[index];
else
return nullptr;
}
// Quantities simply added from both anodes
constexpr float charge() const {
float q = 0.f;
for (unsigned i = 0; i < 2; ++i)
if (hasInfo_[i])
q += hfQIE10Info_[i].charge();
return q;
}
constexpr float energy() const {
float e = 0.f;
for (unsigned i = 0; i < 2; ++i)
if (hasInfo_[i])
e += hfQIE10Info_[i].energy();
return e;
}
// The following function returns a pair.
// The first element of the pair is the charge asymmetry,
// if calculated. The second element of the pair indicates
// whether the asymmetry is actually calculated. "true"
// means yes, it is. The asymmetry is calculated if all
// of the following conditions are satisfied:
//
// 1) The data is available for both PMT anodes.
// 2) The sum of the charges is positive.
// 3) The sum of the charges is at least "chargeThreshold".
//
// If the asymmetry is not calculated, the first element of
// the pair is set to 0 and the second to "false".
//
std::pair<float, bool> chargeAsymmetry(float chargeThreshold) const;
// Similar function for the energy asymmetry
std::pair<float, bool> energyAsymmetry(float energyThreshold) const;
private:
HcalDetId id_;
HFQIE10Info hfQIE10Info_[2];
bool hasInfo_[2];
};
#endif // DATAFORMATS_HCALRECHIT_HFPRERECHIT_H
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