/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_7/src/Geometry/TrackerNumberingBuilder/plugins/CmsTrackerDetIdBuilder.cc

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#include "Geometry/TrackerNumberingBuilder/plugins/CmsTrackerDetIdBuilder.h"
#include "Geometry/TrackerNumberingBuilder/interface/GeometricDet.h"
#include "FWCore/Utilities/interface/Exception.h"
#include "DataFormats/DetId/interface/DetId.h"

#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
#include <bitset>

CmsTrackerDetIdBuilder::CmsTrackerDetIdBuilder( unsigned int layerNumberPXB )
  : m_layerNumberPXB( layerNumberPXB )
{}

GeometricDet*
CmsTrackerDetIdBuilder::buildId( GeometricDet* tracker )
{
  DetId t( DetId::Tracker, 0 );
  tracker->setGeographicalID( t );
  iterate( tracker, 0, tracker->geographicalID().rawId() );

  return tracker;
}

void
CmsTrackerDetIdBuilder::iterate( GeometricDet const *in, int level, unsigned int ID )
{
  std::bitset<32> binary_ID(ID);

  // SubDetector (useful to know fron now on, valid only after level 0, where SubDetector is assigned)
  uint32_t mask = (7<<25);
  uint32_t iSubDet = ID & mask;
  iSubDet = iSubDet >> 25;
  //
  
  switch( level )
  {
    // level 0
  case 0:
    {  
      for( uint32_t i = 0; i<(in)->components().size(); i++ )
      {
        uint32_t jSubDet = ((in)->components())[i]->geographicalID().rawId();
        uint32_t temp = ID;
        temp |= (jSubDet<<25);
        ((in)->components())[i]->setGeographicalID(temp);       
        
        switch( jSubDet )
        { 
          // PXF
        case 2:
          {
            // SubDetector Side start bit is 23 [3 unused and Side length is 2 bit]
            if(((in)->components())[i]->translation().z()<0. )
            {
              temp |= (1<<23); // PXF-
            }
            else
            {
              temp |= (2<<23); // PXF+
            }
            break;
          }
          // TID
        case 4:
          {
            temp|= (0<<15); // SubDetector Side start bit is 13 [10 unused and Side length is 2 bit]
            if((((in)->components())[i])->components()[0]->translation().z()<0. )
            {
              temp |= (1<<13); // TIDB = TID-
            }
            else
            {
              temp |= (2<<13); // TIDF = TID+
            }
            break;
          }
          // TEC
        case 6:
          {
            temp |= (0<<20); // SubDetector Side start bit is 18 [5 unused and Side length is 2 bit]
            if(((in)->components())[i]->translation().z()<0. )
            {
              temp |= (1<<18); // TEC-
            }
            else
            {
              temp |= (2<<18); // TEC+
            }
            break;
          }
          // PXB, TIB, TOB (barrel)
        default:
          {
            // do nothing
          }
          // SubDetector switch ends
        }
        
        ((in)->components())[i]->setGeographicalID(DetId(temp));        
        
        // next level
        iterate(((in)->components())[i],level+1,((in)->components())[i]->geographicalID().rawId());
      }
      break;
    }
  // level 1
  case 1:
    {
      for( uint32_t i = 0; i < (in)->components().size(); i++ )
      {
        uint32_t temp = ID;
      
        switch( iSubDet )
        {
        // PXB
        case 1:
          {
            temp |= (((in)->components())[i]->geographicalID().rawId() << m_layerNumberPXB ); // Layer Number start bit is 16 [5 unused]
            break;
          }
        // PXF
        case 2:
          {
            temp |= (((in)->components())[i]->geographicalID().rawId() << 16 ); // Disk Number start bit is 16
            break;
          }
        // TIB
        case 3:
          {
            temp |= (((in)->components())[i]->geographicalID().rawId() << 14); // Layer Number start bit is 14 [8 unused]
            break;
          }
        
        // TID
        case 4:
          {
            temp |= (((in)->components())[i]->geographicalID().rawId() << 11); // Disk (Wheel) Number start bit is 11
            break;
          }
        
        // TOB
        case 5:
          {
            temp |= (((in)->components())[i]->geographicalID().rawId() << 14); // Layer Number start bit is 14 [8 unused]
            break;
          }
        
        // TEC
        case 6:
          {
            temp |= (((in)->components())[i]->geographicalID().rawId() << 14); // Wheel Number start bit is 14
            break;
          }
      
        // the rest
        default:
          {
            // do nothing
          }
        
        // SubDetector switch ends
        }
      
        ((in)->components())[i]->setGeographicalID( temp );
      
        // next level
        iterate(((in)->components())[i],level+1,((in)->components())[i]->geographicalID().rawId());      
      }
    
      break; 
    }    
    // level 2
  case 2: {
    
    for (uint32_t i=0;i<(in)->components().size();i++) {
        
      switch (iSubDet) {

        // PXB
      case 1:
        {
          uint32_t temp = ID;
          // Ladder Starting bit = 2 (last unused) + 6 (Module Number) = 8
          temp |= (((in)->components())[i]->geographicalID().rawId()<<8);
          ((in)->components())[i]->setGeographicalID(temp);
          break;
        }
        
        // PXF
      case 2:
        {
          uint32_t temp = ID;
          // Blade Starting bit = 1 (last unused) + 5 (Module Number) + 2 (Plaquette part) = 8
          temp |= (((in)->components())[i]->geographicalID().rawId()<<8);
          ((in)->components())[i]->setGeographicalID(temp);
          break;
        }
        
        // TIB
      case 3:
        {
          uint32_t temp = ID;
          // Side+Part+String Starting bit = 2 (Module Type) + 2 (Module Number) = 4
          temp |= (((in)->components())[i]->geographicalID().rawId()<<4);
          ((in)->components())[i]->setGeographicalID(temp);
          break;
        }
        
        // TID
      case 4:
        {
          uint32_t temp = ID;
          // Ring+Part Starting bit = 2 (Module Type) + 5 (Module Number) + 2 (Disk Part)= 9
          temp |= (((in)->components())[i]->geographicalID().rawId()<<9);
          ((in)->components())[i]->setGeographicalID(DetId(temp));
          break;
        }
        
        // TOB
      case 5:
        {
          uint32_t temp = ID;
          // Side+Rod Starting bit = 2 (Module Type) + 3 (Module Number) = 5
          temp |= (((in)->components())[i]->geographicalID().rawId()<<5);
          ((in)->components())[i]->setGeographicalID(temp);
          break;
        }
        
        // TEC
      case 6:
        {
          uint32_t temp = ID;
          // Petal+Part Starting bit = 2 (Module Type) + 3 (Module Number) + 3 (Ring Number) = 8
          temp |= (((in)->components())[i]->geographicalID().rawId()<<8);
          ((in)->components())[i]->setGeographicalID(temp);
          break;
        }
        
        // the rest
      default:
        {
          // do nothing
        }
        
        // SubDetector switch ends
      }

      // next level
      iterate(((in)->components())[i],level+1,((in)->components())[i]->geographicalID().rawId());
    }
    
    break;    
  }
    
    // level 3
  case 3:
    {
      for (uint32_t i=0;i<(in)->components().size();i++) {
        
        switch (iSubDet) {
          
          // TEC
        case 6:
          {
            // Ring Starting bit = 2 (Module Type) + 3 (Module Number)
            uint32_t temp = ID;
            temp |= (((in)->components())[i]->geographicalID().rawId()<<5);
            ((in)->components())[i]->setGeographicalID(temp);
            break;
          }
          
          // the others but TEC
        default:
          {
            uint32_t temp = ID;
            temp |= (((in)->components())[i]->geographicalID().rawId()<<2); // Starting bit = 2 (Module Type)
            ((in)->components())[i]->setGeographicalID(temp);
          }
          
          // SubDetector switch ends
        }
        
        // next level
        iterate(((in)->components())[i],level+1,((in)->components())[i]->geographicalID().rawId());
        
      }
      
      break;
    }
    
    // level 4
  case 4:
    {

      for (uint32_t i=0;i<(in)->components().size();i++) {
        
        switch (iSubDet) {
          
          // TEC
        case 6:
          {
            // Module Number bit = 2 (Module Type)
            uint32_t temp = ID;
            temp |= (((in)->components())[i]->geographicalID().rawId()<<2);
            ((in)->components())[i]->setGeographicalID(temp);
            // next level
            iterate(((in)->components())[i],level+1,((in)->components())[i]->geographicalID().rawId());
            break;
          }
          
          // the others stop here!
        default:
          {
            for (uint32_t i=0;i<(in)->components().size();i++) {
              uint32_t temp = ID;
              temp |= (((in)->components())[i]->geographicalID().rawId());
              ((in)->components())[i]->setGeographicalID(temp);
            }
          }
          
          // SubDetector switch ends
        }

      }
      
      break;
    }
    
    // level 5
  case 5:
    {
      // TEC Module Type (only TEC arrives here)
      for (uint32_t i=0;i<(in)->components().size();i++) {
        uint32_t temp = ID;
        temp |= (((in)->components())[i]->geographicalID().rawId());
        ((in)->components())[i]->setGeographicalID(temp);
      }
      break;
    }
    
    // throw exception
  default:
    {
      cms::Exception("LogicError") <<" CmsTrackerDetIdBuilder invalid level "<< level;
    }
    
    // level switch ends
  }
  
  return;

}