GEMDetId Class Reference

#include <GEMDetId.h>

Inheritance diagram for GEMDetId:

Public Member Functions
int	chamber () const
	Chamber id: it identifies a chamber in a ring it goes from 1 to 36. More...
GEMDetId	chamberId () const
	Return the corresponding ChamberId. More...
	GEMDetId ()
	GEMDetId (uint32_t id)
	GEMDetId (DetId id)
	GEMDetId (int region, int ring, int station, int layer, int chamber, int roll)
	Construct from fully qualified identifier. More...
int	layer () const
	Layer id: each station have two layers of chambers: layer 1 is the inner chamber and layer 2 is the outer chamber (when present) More...
bool	operator< (const GEMDetId &r) const
	Sort Operator based on the raw detector id. More...
int	region () const
	Region id: 0 for Barrel Not in use, +/-1 For +/- Endcap. More...
int	ring () const
int	roll () const
int	station () const
	Station id : the station is the pair of chambers at same disk. More...
Public Member Functions inherited from DetId
Detector	det () const
	get the detector field from this detid More...
	DetId ()
	Create an empty or null id (also for persistence) More...
	DetId (uint32_t id)
	Create an id from a raw number. More...
	DetId (Detector det, int subdet)
	Create an id, filling the detector and subdetector fields as specified. More...
bool	null () const
	is this a null id ? More...
	operator uint32_t () const
bool	operator!= (DetId id) const
	inequality More...
uint32_t	operator() () const
bool	operator< (DetId id) const
	comparison More...
bool	operator== (DetId id) const
	equality More...
uint32_t	rawId () const
	get the raw id More...
int	subdetId () const
	get the contents of the subdetector field (not cast into any detector's numbering enum) More...

Static Public Attributes
static const int	maxChamberId = 36
static const int	maxLayerId = 2
static const int	maxRegionId = 1
static const int	maxRingId = 3
static const int	maxRollId = 15
static const int	maxStationId = 4
static const int	minChamberId = 0
static const int	minLayerId = 1
static const int	minRegionId = -1
static const int	minRingId = 1
static const int	minRollId = 0
static const int	minStationId = 1
Static Public Attributes inherited from DetId
static const int	kDetOffset = 28
static const int	kSubdetOffset = 25

Private Member Functions
void	init (int region, int ring, int station, int layer, int chamber, int roll)

Private Attributes
int	trind

Static Private Attributes
static const uint32_t	chamberIdMask_ = ~(RollMask_<<RollStartBit_)
static const unsigned int	ChamberMask_ = 0X3F
static const int	ChamberNumBits_ = 6
static const int	ChamberStartBit_ = StationStartBit_+StationNumBits_
static const unsigned int	LayerMask_ = 0X1
static const int	LayerNumBits_ = 1
static const int	LayerStartBit_ = ChamberStartBit_+ChamberNumBits_
static const int	RegionMask_ = 0X3
static const int	RegionNumBits_ = 2
static const int	RegionStartBit_ = 0
static const unsigned int	RingMask_ = 0X7
static const int	RingNumBits_ = 3
static const int	RingStartBit_ = RegionStartBit_+RegionNumBits_
static const unsigned int	RollMask_ = 0X1F
static const int	RollNumBits_ = 5
static const int	RollStartBit_ = LayerStartBit_+LayerNumBits_
static const unsigned int	StationMask_ = 0X7
static const int	StationNumBits_ = 3
static const int	StationStartBit_ = RingStartBit_+RingNumBits_

Additional Inherited Members
Public Types inherited from DetId
enum	Detector {   Tracker =1, Muon =2, Ecal =3, Hcal =4,   Calo =5 }
Protected Attributes inherited from DetId
uint32_t	id_

Detailed Description

DetUnit identifier for GEMs

Definition at line 16 of file GEMDetId.h.

Constructor & Destructor Documentation

GEMDetId::GEMDetId

(

)

Definition at line 8 of file GEMDetId.cc.

Referenced by chamberId().

:DetId(DetId::Muon, MuonSubdetId::GEM){}

GEMDetId::GEMDetId

(

uint32_t

id

)

Construct from a packed id. It is required that the Detector part of id is Muon and the SubDet part is GEM, otherwise an exception is thrown.

Definition at line 11 of file GEMDetId.cc.

References DetId::det(), edm::hlt::Exception, MuonSubdetId::GEM, DetId::Muon, and DetId::subdetId().

                             :DetId(id){
  if (det()!=DetId::Muon || subdetId()!=MuonSubdetId::GEM) {
    throw cms::Exception("InvalidDetId") << "GEMDetId ctor:"
                     << " det: " << det()
                     << " subdet: " << subdetId()
                     << " is not a valid GEM id";  
  }
}

GEMDetId::GEMDetId

(

DetId

id

)

Definition at line 20 of file GEMDetId.cc.

References DetId::det(), edm::hlt::Exception, MuonSubdetId::GEM, DetId::Muon, and DetId::subdetId().

                          :DetId(id) {
  if (det()!=DetId::Muon || subdetId()!=MuonSubdetId::GEM) {
    throw cms::Exception("InvalidDetId") << "GEMDetId ctor:"
                     << " det: " << det()
                     << " subdet: " << subdetId()
                     << " is not a valid GEM id";  
  }
}

GEMDetId::GEMDetId	(	int	region,
		int	ring,
		int	station,
		int	layer,
		int	chamber,
		int	roll
	)

Construct from fully qualified identifier.

Definition at line 29 of file GEMDetId.cc.

References init().

                                                                                    :         
  DetId(DetId::Muon, MuonSubdetId::GEM)
{
  this->init(region,ring,station,layer,chamber,roll);
}

Member Function Documentation

int GEMDetId::chamber ( ) const

inline

Chamber id: it identifies a chamber in a ring it goes from 1 to 36.

Definition at line 74 of file GEMDetId.h.

References ChamberMask_, ChamberStartBit_, DetId::id_, and minChamberId.

Referenced by geometryXMLparser.CSCAlignable::index().

                     {
    return int((id_>>ChamberStartBit_) & ChamberMask_) + (minChamberId+1);
  }

GEMDetId GEMDetId::chamberId ( ) const

inline

Return the corresponding ChamberId.

Definition at line 86 of file GEMDetId.h.

References chamberIdMask_, GEMDetId(), and DetId::id_.

                             {
    return GEMDetId(id_ & chamberIdMask_);
  }

void GEMDetId::init ( int  region, int  ring, int  station, int  layer, int  chamber, int  roll  )

private

Definition at line 36 of file GEMDetId.cc.

References ChamberMask_, ChamberStartBit_, edm::hlt::Exception, DetId::id_, LayerMask_, LayerStartBit_, maxChamberId, maxLayerId, maxRegionId, maxRingId, maxRollId, maxStationId, minChamberId, minLayerId, minRegionId, minRingId, minStationId, RegionMask_, RegionStartBit_, RingMask_, RingStartBit_, roll(), RollMask_, RollStartBit_, StationMask_, and StationStartBit_.

Referenced by GEMDetId().

{
  if ( region     < minRegionId    || region    > maxRegionId ||
       ring       < minRingId      || ring      > maxRingId ||
       station    < minStationId   || station   > maxStationId ||
       layer      < minLayerId     || layer     > maxLayerId ||
       chamber    < minChamberId   || chamber   > maxChamberId ||
       roll       < minRollId      || roll      > maxRollId) {
    throw cms::Exception("InvalidDetId") << "GEMDetId ctor:" 
                     << " Invalid parameters: " 
                     << " region "<<region
                     << " ring "<<ring
                     << " station "<<station
                     << " layer "<<layer
                     << " chamber "<<chamber
                     << " roll "<<roll
                     << std::endl;
  }
  int regionInBits=region-minRegionId;
  int ringInBits = ring-minRingId;
  int stationInBits=station-minStationId;
  int layerInBits=layer-minLayerId;
  int chamberInBits=chamber-(minChamberId+1);
  int rollInBits=roll;
  
  id_ |= ( regionInBits    & RegionMask_)    << RegionStartBit_    | 
         ( ringInBits      & RingMask_)      << RingStartBit_      |
         ( stationInBits   & StationMask_)   << StationStartBit_   |
         ( layerInBits     & LayerMask_)     << LayerStartBit_     |
         ( chamberInBits   & ChamberMask_)    << ChamberStartBit_  |
         ( rollInBits      & RollMask_)      << RollStartBit_        ;
   
}

int GEMDetId::layer ( ) const

inline

Layer id: each station have two layers of chambers: layer 1 is the inner chamber and layer 2 is the outer chamber (when present)

Definition at line 69 of file GEMDetId.h.

References DetId::id_, LayerMask_, LayerStartBit_, and minLayerId.

Referenced by geometryXMLparser.DTAlignable::index(), geometryXMLparser.CSCAlignable::index(), and operator<().

                   {
    return int((id_>>LayerStartBit_) & LayerMask_) + minLayerId;
  }

bool GEMDetId::operator< ( const GEMDetId &  r ) const

inline

Sort Operator based on the raw detector id.

Definition at line 38 of file GEMDetId.h.

References layer(), DetId::rawId(), and station().

                                           {
    if (r.station() == this->station()  ){
      if (this->layer() ==  r.layer()  ){
    return this->rawId()<r.rawId();
      }
      else{
    return (this->layer() < r.layer());
      }
    }
    else {
      return this->station() < r.station();
    }
  }

int GEMDetId::region ( ) const

inline

Region id: 0 for Barrel Not in use, +/-1 For +/- Endcap.

Definition at line 53 of file GEMDetId.h.

References DetId::id_, minRegionId, RegionMask_, and RegionStartBit_.

                    {
    return int((id_>>RegionStartBit_) & RegionMask_) + minRegionId;
  }

int GEMDetId::ring ( ) const

inline

Ring id: GEM are installed only on ring 1 the ring is the group of chambers with same r (distance of beam axis) and increasing phi

Definition at line 59 of file GEMDetId.h.

References DetId::id_, minRingId, RingMask_, and RingStartBit_.

Referenced by geometryXMLparser.CSCAlignable::index().

                  {
      return int((id_>>RingStartBit_) & RingMask_) + minRingId;
  }

int GEMDetId::roll ( ) const

inline

Roll id (also known as eta partition): each chamber is divided along the strip direction in several parts (rolls) GEM up to 10

Definition at line 80 of file GEMDetId.h.

References DetId::id_, RollMask_, and RollStartBit_.

Referenced by init().

                  {
    return int((id_>>RollStartBit_) & RollMask_); // value 0 is used as wild card
  }

int GEMDetId::station ( ) const

inline

Station id : the station is the pair of chambers at same disk.

Definition at line 64 of file GEMDetId.h.

References DetId::id_, minStationId, StationMask_, and StationStartBit_.

Referenced by geometryXMLparser.DTAlignable::index(), geometryXMLparser.CSCAlignable::index(), and operator<().

                     {
    return int((id_>>StationStartBit_) & StationMask_) + minStationId;
  }

Member Data Documentation

const uint32_t GEMDetId::chamberIdMask_ = ~(RollMask_<<RollStartBit_)

staticprivate

Definition at line 134 of file GEMDetId.h.

Referenced by chamberId().

const unsigned int GEMDetId::ChamberMask_ = 0X3F

staticprivate

Definition at line 124 of file GEMDetId.h.

Referenced by chamber(), and init().

const int GEMDetId::ChamberNumBits_ = 6

staticprivate

Definition at line 122 of file GEMDetId.h.

const int GEMDetId::ChamberStartBit_ = StationStartBit_+StationNumBits_

staticprivate

Definition at line 123 of file GEMDetId.h.

Referenced by chamber(), and init().

const unsigned int GEMDetId::LayerMask_ = 0X1

staticprivate

Definition at line 128 of file GEMDetId.h.

Referenced by init(), and layer().

const int GEMDetId::LayerNumBits_ = 1

staticprivate

Definition at line 126 of file GEMDetId.h.

const int GEMDetId::LayerStartBit_ = ChamberStartBit_+ChamberNumBits_

staticprivate

Definition at line 127 of file GEMDetId.h.

Referenced by init(), and layer().

const int GEMDetId::maxChamberId = 36

static

Definition at line 100 of file GEMDetId.h.

Referenced by init().

const int GEMDetId::maxLayerId = 2

static

Definition at line 103 of file GEMDetId.h.

Referenced by init().

const int GEMDetId::maxRegionId = 1

static

Definition at line 91 of file GEMDetId.h.

Referenced by init().

const int GEMDetId::maxRingId = 3

static

Definition at line 94 of file GEMDetId.h.

Referenced by init().

const int GEMDetId::maxRollId = 15

static

Definition at line 106 of file GEMDetId.h.

Referenced by init().

const int GEMDetId::maxStationId = 4

static

Definition at line 97 of file GEMDetId.h.

Referenced by init().

const int GEMDetId::minChamberId = 0

static

Definition at line 99 of file GEMDetId.h.

Referenced by chamber(), and init().

const int GEMDetId::minLayerId = 1

static

Definition at line 102 of file GEMDetId.h.

Referenced by init(), and layer().

const int GEMDetId::minRegionId = -1

static

Definition at line 90 of file GEMDetId.h.

Referenced by init(), and region().

const int GEMDetId::minRingId = 1

static

Definition at line 93 of file GEMDetId.h.

Referenced by init(), and ring().

const int GEMDetId::minRollId = 0

static

Definition at line 105 of file GEMDetId.h.

const int GEMDetId::minStationId = 1

static

Definition at line 96 of file GEMDetId.h.

Referenced by init(), and station().

const int GEMDetId::RegionMask_ = 0X3

staticprivate

Definition at line 111 of file GEMDetId.h.

Referenced by init(), and region().

const int GEMDetId::RegionNumBits_ = 2

staticprivate

Definition at line 109 of file GEMDetId.h.

const int GEMDetId::RegionStartBit_ = 0

staticprivate

Definition at line 110 of file GEMDetId.h.

Referenced by init(), and region().

const unsigned int GEMDetId::RingMask_ = 0X7

staticprivate

Definition at line 115 of file GEMDetId.h.

Referenced by init(), and ring().

const int GEMDetId::RingNumBits_ = 3

staticprivate

Definition at line 113 of file GEMDetId.h.

const int GEMDetId::RingStartBit_ = RegionStartBit_+RegionNumBits_

staticprivate

Definition at line 114 of file GEMDetId.h.

Referenced by init(), and ring().

const unsigned int GEMDetId::RollMask_ = 0X1F

staticprivate

Definition at line 132 of file GEMDetId.h.

Referenced by init(), and roll().

const int GEMDetId::RollNumBits_ = 5

staticprivate

Definition at line 130 of file GEMDetId.h.

const int GEMDetId::RollStartBit_ = LayerStartBit_+LayerNumBits_

staticprivate

Definition at line 131 of file GEMDetId.h.

Referenced by init(), and roll().

const unsigned int GEMDetId::StationMask_ = 0X7

staticprivate

Definition at line 119 of file GEMDetId.h.

Referenced by init(), and station().

const int GEMDetId::StationNumBits_ = 3

staticprivate

Definition at line 117 of file GEMDetId.h.

const int GEMDetId::StationStartBit_ = RingStartBit_+RingNumBits_

staticprivate

Definition at line 118 of file GEMDetId.h.

Referenced by init(), and station().

int GEMDetId::trind

private

Definition at line 144 of file GEMDetId.h.