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//   $Revision: 1.16 $
//   $Date: 2010/09/10 10:30:03 $
//   (last update by $Author: mussgill $)

#ifndef Alignment_CommonAlignment_AlignableNavigator_h
#define Alignment_CommonAlignment_AlignableNavigator_h

#include <map>
#include <vector>

#include "TrackingTools/TransientTrackingRecHit/interface/TransientTrackingRecHit.h"

#include "Alignment/CommonAlignment/interface/AlignableDetOrUnitPtr.h"

class Alignable;
class AlignableDet;
class AlignableExtras;
class GeomDet;



class AlignableNavigator 
{

public:
  
  explicit AlignableNavigator(Alignable* tracker, Alignable* muon = 0);
  
  explicit AlignableNavigator(AlignableExtras* extras, Alignable* tracker, Alignable* muon = 0);

  explicit AlignableNavigator( std::vector<Alignable*> alignables );

  typedef std::map<DetId, AlignableDetOrUnitPtr> MapType;
  typedef MapType::value_type PairType;

  AlignableDetOrUnitPtr alignableFromDetId( const DetId& detid );

  AlignableDetOrUnitPtr alignableFromGeomDet( const GeomDet* geomDet );

  std::vector<AlignableDetOrUnitPtr> 
    alignablesFromHits(const std::vector<const TransientTrackingRecHit*>& hitvec);

  std::vector<AlignableDetOrUnitPtr> alignablesFromHits
    (const TransientTrackingRecHit::ConstRecHitContainer &hitVec);

  std::vector<AlignableDetOrUnitPtr> alignableDetOrUnits();

  int size( void ) { return theMap.size(); }

  bool detAndSubdetInMap( const DetId& detid ) const;

private:
  unsigned int recursiveGetId(Alignable* alignable);

  MapType                          theMap;
  std::vector<std::pair<int,int> > theDetAndSubdet;
};

#endif