reco::CaloID Class Reference

#include <CaloID.h>

Public Types
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_NONE }

Public Member Functions
	CaloID ()
	default constructor. Sets energy and position to zero More...
	CaloID (Detectors det)
bool	detector (CaloID::Detectors theDetector) const
Detectors	detector () const
unsigned	detectors () const
bool	isSingleDetector () const
CaloID &	operator= (const CaloID &rhs)
void	setDetector (CaloID::Detectors theDetector, bool value)
	tells the CaloID that it describes a given detector More...
virtual	~CaloID ()
	abstract class More...

Private Member Functions
int	leastSignificantBitPosition (unsigned n) const

Private Attributes
unsigned	detectors_

Friends
std::ostream &	operator<< (std::ostream &out, const CaloID &id)

Detailed Description

ID information for all calorimeters.

Author

Colin Bernet, LLR

Definition at line 17 of file CaloID.h.

Member Enumeration Documentation

enum reco::CaloID::Detectors

Enumerator
DET_ECAL_BARREL
DET_ECAL_ENDCAP
DET_PS1
DET_PS2
DET_HCAL_BARREL
DET_HCAL_ENDCAP
DET_HF
DET_HF_EM
DET_HF_HAD
DET_HO
DET_NONE

Definition at line 21 of file CaloID.h.

                   {
      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_NONE
    };

Constructor & Destructor Documentation

reco::CaloID::CaloID ( )

inline

default constructor. Sets energy and position to zero

Definition at line 36 of file CaloID.h.

: detectors_(0) {}

reco::CaloID::CaloID ( Detectors  det )

inline

Definition at line 38 of file CaloID.h.

References setDetector().

: detectors_(0) { setDetector(det, true); }

virtual reco::CaloID::~CaloID ( )

inlinevirtual

abstract class

Definition at line 41 of file CaloID.h.

{}

Member Function Documentation

bool CaloID::detector

(

CaloID::Detectors

theDetector

)

const

Returns

true if this CaloID is in a given detector

Definition at line 21 of file CaloID.cc.

                                                 {

  return (detectors_>>theDetector) & 1;
}

CaloID::Detectors CaloID::detector

(

)

const

Returns

the described detector if isSingleDetector(), and DET_NONE otherwise.

Definition at line 27 of file CaloID.cc.

                                        {
  if( ! isSingleDetector() ) return DET_NONE;
  
  int pos =  leastSignificantBitPosition( detectors_ );
  
  CaloID::Detectors det = static_cast<CaloID::Detectors>(pos);
                                   
  return det;
}

unsigned reco::CaloID::detectors ( ) const

inline

Returns

packed detector information

Definition at line 47 of file CaloID.h.

References detectors_.

{return detectors_;}

bool reco::CaloID::isSingleDetector ( ) const

inline

Returns

true if this CaloID describes a single detector

Definition at line 53 of file CaloID.h.

References detectors_.

                                  {
      // check that detectors_ is a power of 2
      return static_cast<bool>(detectors_ && !( (detectors_-1) & detectors_ ));
    }

int CaloID::leastSignificantBitPosition ( unsigned  n ) const

private

Returns

lsb position in an integer

Definition at line 39 of file CaloID.cc.

                                                        {
    if (n == 0)
      return -1;
 
    int pos = 31;

    if (n & 0x000000000000FFFFLL) { pos -= 16; } else { n >>= 16; }
    if (n & 0x00000000000000FFLL) { pos -=  8; } else { n >>=  8; }
    if (n & 0x000000000000000FLL) { pos -=  4; } else { n >>=  4; }
    if (n & 0x0000000000000003LL) { pos -=  2; } else { n >>=  2; }
    if (n & 0x0000000000000001LL) { pos -=  1; }
    return pos;
}

CaloID& reco::CaloID::operator= ( const CaloID &  rhs )

inline

Definition at line 62 of file CaloID.h.

References detectors_.

                                         { 
      detectors_ = rhs.detectors_;
      return *this;
    }

void CaloID::setDetector	(	CaloID::Detectors	theDetector,
		bool	value
	)

tells the CaloID that it describes a given detector

Definition at line 8 of file CaloID.cc.

Referenced by CaloID().

                                                          {
  
  //  cout<<"CaloID::setDetector "<<theDetector<<" "<<(1<<theDetector)<<endl;
  if(value)
    detectors_ = detectors_ | (1<<theDetector);
  else 
    detectors_ = detectors_ ^ (1<<theDetector);

  // cout<<detectors_<<endl;
}

Friends And Related Function Documentation

std::ostream& operator<< ( std::ostream &  out, const CaloID &  id  )

friend

Member Data Documentation

unsigned reco::CaloID::detectors_

private

packs the detector information into a bitmask. a CaloID can describe several detectors (bit or)

Definition at line 77 of file CaloID.h.

Referenced by detectors(), isSingleDetector(), and operator=().