/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_5/src/DataFormats/MuonDetId/interface/RPCDetId.h

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#ifndef MuonDetId_RPCDetId_h
#define MuonDetId_RPCDetId_h

#include <DataFormats/DetId/interface/DetId.h>
#include <FWCore/Utilities/interface/Exception.h>

#include <iosfwd>

class RPCDetId :public DetId {
  
 public:
      
  RPCDetId();

  RPCDetId(uint32_t id);
  RPCDetId(DetId id);


  RPCDetId(int region, 
           int ring,
           int station, 
           int sector,
           int layer,
           int subsector,
           int roll);
           

  bool operator < (const RPCDetId& r) const{
    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();
    }
  }

  void buildfromDB(int region, int ring, int layer, int sector, 
                   const std::string& subsector,
                   const std::string& roll,
                   const std::string& dbname);

  void buildfromTrIndex(int trIndex);

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


  int ring() const{
  
    int ring_= (id_>>RingStartBit_) & RingMask_;
    
    if(ring_ <RingBarrelOffSet){
    
        if(this->region() == 0)
        {
         throw cms::Exception("InvalidDetId") << "RPCDetId ctor:" 
                                         << " Ring - Region Inconsistency, " 
                                         << " region "<< this->region()
                                         << " ring "<<ring_
                                         << std::endl;
        }
         
        return int(ring_ + minRingForwardId);

    } else { // if(ring_ >= RingBarrelOffSet) 
      return int(ring_ - RingBarrelOffSet + minRingBarrelId);
    }
  }

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


  int sector() const{
    return int((id_>>SectorStartBit_) & SectorMask_) + (minSectorId+1);
  }

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


  int subsector() const{
    return int((id_>>SubSectorStartBit_) & SubSectorMask_) + (minSubSectorId+1);
  }

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


  int trIndex() const{
    return trind;
  }

  RPCDetId chamberId() const {
    return RPCDetId(id_ & chamberIdMask_);
  }


  static const int minRegionId=     -1;
  static const int maxRegionId=      1;
 
  static const int minRingForwardId=   1;
  static const int maxRingForwardId=   3;
  static const int minRingBarrelId=   -2;
  static const int maxRingBarrelId=    2;
  static const int RingBarrelOffSet=   3;
 
  static const int minStationId=     1;
  static const int maxStationId=     4;

  static const int minSectorId=     0;
  static const int maxSectorId=     12;
  static const int minSectorBarrelId=     1;
  static const int maxSectorBarrelId=     12;
  static const int minSectorForwardId=     1;
  static const int maxSectorForwardId=     6;

  static const int minLayerId=     1;
  static const int maxLayerId=     2;

  static const int minSubSectorId=       0;
  static const int maxSubSectorId=       6;
  static const int minSubSectorBarrelId=         1;
  static const int maxSubSectorBarrelId=         4;
  static const int minSubSectorForwardId=        1;
  static const int maxSubSectorForwardId=        6;

  static const int minRollId=     0;
  static const int maxRollId=     4;


 private:
  static const int RegionNumBits_  =  2;
  static const int RegionStartBit_ =  0;  
  static const int RegionMask_     =  0X3;

  static const int RingNumBits_  =  3;
  static const int RingStartBit_ =  RegionStartBit_+RegionNumBits_;  
  static const unsigned int RingMask_     =  0X7;

  static const int StationNumBits_  =  2;
  static const int StationStartBit_ =  RingStartBit_+RingNumBits_;  
  static const unsigned int StationMask_     =  0X3;


  static const int SectorNumBits_  =  4;
  static const int SectorStartBit_ =  StationStartBit_+StationNumBits_;  
  static const unsigned int SectorMask_     =  0XF;

  static const int LayerNumBits_  =  1;
  static const int LayerStartBit_ =  SectorStartBit_+SectorNumBits_;  
  static const unsigned int LayerMask_     =  0X1;

  static const int SubSectorNumBits_  =  3;
  static const int SubSectorStartBit_ =  LayerStartBit_+LayerNumBits_;  
  static const unsigned int SubSectorMask_     =  0X7;
  
  static const int RollNumBits_  =  3;
  static const int RollStartBit_ =  SubSectorStartBit_+SubSectorNumBits_;  
  static const unsigned int RollMask_     =  0X7;
 
  static const uint32_t chamberIdMask_ = ~(RollMask_<<RollStartBit_);

 private:
  void init(int region, 
            int ring,
            int station, 
            int sector,
            int layer,
            int subsector,
            int roll);
  
  int trind;
}; // RPCDetId

std::ostream& operator<<( std::ostream& os, const RPCDetId& id );

#endif