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/****************************************************************************
*
* This is a part of TOTEM offline software.
* Authors:
* Jan Kašpar (jan.kaspar@gmail.com)
*
****************************************************************************/
#ifndef DataFormats_CTPPSDetId_CTPPSDetId
#define DataFormats_CTPPSDetId_CTPPSDetId
#include "DataFormats/DetId/interface/DetId.h"
#include "FWCore/Utilities/interface/Exception.h"
#include <iosfwd>
#include <iostream>
#include <string>
/**
*\brief Base class for CTPPS detector IDs.
*
* The bit structure is as follows:
* bits [24:24] => arm: 0 (sector 45), 1 (sector 56)
* bits [22:23] => station: 0 (210m), 1 (cylyndrical pots), 2 (220m)
* bits [19:21] => Roman Pot: 0 (near top), 1 (near bottom), 2 (near horizontal), 3 (far horizontal), 4 (far top), 5 (far bottom)
* bits [0:18] => available for derived classes
*
* The ...Name() methods implement the official naming scheme based on EDMS 906715.
**/
class CTPPSDetId : public DetId {
public:
/// CTPPS sub-detectors
enum SubDetector {
sdTrackingStrip = 3,
sdTrackingPixel = 4,
sdTimingDiamond = 5,
sdTimingFastSilicon = 6,
sdTotemT2 = 7
};
/// Construct from a raw id.
explicit CTPPSDetId(uint32_t id);
/// Construct from hierarchy indeces.
CTPPSDetId(uint32_t SubDet, uint32_t Arm, uint32_t Station, uint32_t RomanPot = 0);
//-------------------- bit assignment --------------------
static const uint32_t startArmBit, maskArm, maxArm, lowMaskArm;
static const uint32_t startStationBit, maskStation, maxStation, lowMaskStation;
static const uint32_t startRPBit, maskRP, maxRP, lowMaskRP;
//-------------------- component getters and setters --------------------
uint32_t arm() const { return ((id_ >> startArmBit) & maskArm); }
void setArm(uint32_t arm) {
id_ &= ~(maskArm << startArmBit);
id_ |= ((arm & maskArm) << startArmBit);
}
uint32_t station() const { return ((id_ >> startStationBit) & maskStation); }
void setStation(uint32_t station) {
id_ &= ~(maskStation << startStationBit);
id_ |= ((station & maskStation) << startStationBit);
}
uint32_t rp() const { return ((id_ >> startRPBit) & maskRP); }
void setRP(uint32_t rp) {
id_ &= ~(maskRP << startRPBit);
id_ |= ((rp & maskRP) << startRPBit);
}
//-------------------- id getters for higher-level objects --------------------
CTPPSDetId armId() const { return CTPPSDetId(rawId() & (~lowMaskArm)); }
CTPPSDetId stationId() const { return CTPPSDetId(rawId() & (~lowMaskStation)); }
CTPPSDetId rpId() const { return CTPPSDetId(rawId() & (~lowMaskRP)); }
//-------------------- name methods --------------------
/// type of name returned by *Name functions
enum NameFlag { nShort, nFull, nPath };
inline void subDetectorName(std::string &name, NameFlag flag = nFull) const {
if (flag == nPath)
name = subDetectorPaths[subdetId()];
else
name = subDetectorNames[subdetId()];
}
inline void armName(std::string &name, NameFlag flag = nFull) const {
switch (flag) {
case nShort:
name = "";
break;
case nFull:
subDetectorName(name, flag);
name += "_";
break;
case nPath:
subDetectorName(name, flag);
name += "/sector ";
break;
}
name += armNames[arm()];
}
inline void stationName(std::string &name, NameFlag flag = nFull) const {
switch (flag) {
case nShort:
name = "";
break;
case nFull:
armName(name, flag);
name += "_";
break;
case nPath:
armName(name, flag);
name += "/station ";
break;
}
name += stationNames[station()];
}
inline void rpName(std::string &name, NameFlag flag = nFull) const {
switch (flag) {
case nShort:
name = "";
break;
case nFull:
stationName(name, flag);
name += "_";
break;
case nPath:
stationName(name, flag);
name += "/";
break;
}
name += rpNames[rp()];
}
private:
static const std::string subDetectorNames[];
static const std::string subDetectorPaths[];
static const std::string armNames[];
static const std::string stationNames[];
static const std::string rpNames[];
};
std::ostream &operator<<(std::ostream &os, const CTPPSDetId &id);
namespace std {
template <>
struct hash<CTPPSDetId> {
typedef CTPPSDetId argument_type;
typedef std::size_t result_type;
result_type operator()(const argument_type &id) const noexcept { return std::hash<uint64_t>()(id.rawId()); }
};
} // namespace std
#endif
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