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#ifndef DataFormats_CaloRecHit_CaloID_h
#define DataFormats_CaloRecHit_CaloID_h
/** \class reco::CaloID
*
* ID information for all calorimeters.
*
* \author Colin Bernet, LLR
*
*
*/
#include <iosfwd>
namespace reco {
class CaloID {
public:
enum Detectors {
DET_ECAL_BARREL = 0,
DET_ECAL_ENDCAP,
DET_PS1,
DET_PS2,
DET_HCAL_BARREL,
DET_HCAL_ENDCAP,
DET_HF,
DET_HF_EM,
DET_HF_HAD,
DET_HO,
DET_HGCAL_ENDCAP,
DET_NONE
};
/// default constructor. Sets energy and position to zero
CaloID() : detectors_(0) {}
CaloID(Detectors det) : detectors_(0) { setDetector(det, true); }
/// abstract class
virtual ~CaloID() {}
/// tells the CaloID that it describes a given detector
void setDetector(CaloID::Detectors theDetector, bool value);
/// \return packed detector information
unsigned detectors() const { return detectors_; }
/// \return true if this CaloID is in a given detector
bool detector(CaloID::Detectors theDetector) const;
/// \return true if this CaloID describes a single detector
bool isSingleDetector() const {
// check that detectors_ is a power of 2
return static_cast<bool>(detectors_ && !((detectors_ - 1) & detectors_));
}
/// \return the described detector if isSingleDetector(),
/// and DET_NONE otherwise.
Detectors detector() const;
friend std::ostream& operator<<(std::ostream& out, const CaloID& id);
private:
/// \return lsb position in an integer
int leastSignificantBitPosition(unsigned n) const;
/// packs the detector information into a bitmask.
/// a CaloID can describe several detectors (bit or)
unsigned detectors_;
};
std::ostream& operator<<(std::ostream& out, const CaloID& id);
} // namespace reco
#endif
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