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// $Revision: 1.15 $
// $Date: 2009/02/28 21:06:53 $
// (last update by $Author: flucke $)
#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"
#include "Alignment/CommonAlignment/interface/Utilities.h"
class Alignable;
class AlignableDet;
class AlignableExtras;
class GeomDet;
/// A class to navigate from a DetId to the corresponding AlignableDetOrUnitPtr.
/// A map is created at construction time from all
/// sub-structures of the constructor's argument(s) that are AlignableDet or AlignableDetUnit.
class AlignableNavigator {
public:
/// Constructor from one or two Alignables
explicit AlignableNavigator(Alignable* tracker, Alignable* muon = nullptr);
/// Constructor from one or two Alignables
explicit AlignableNavigator(AlignableExtras* extras, Alignable* tracker, Alignable* muon = nullptr);
/// Constructor from list of Alignbable
explicit AlignableNavigator(const align::Alignables&);
typedef std::map<DetId, AlignableDetOrUnitPtr> MapType;
typedef MapType::value_type PairType;
/// Returns AlignableDetOrUnitPtr corresponding to given DetId
AlignableDetOrUnitPtr alignableFromDetId(const DetId& detid);
/// Returns AlignableDetOrUnitPtr corresponding to given GeomDet
AlignableDetOrUnitPtr alignableFromGeomDet(const GeomDet* geomDet);
/// Returns vector AlignableDetOrUnitPtr for given vector of Hits.
std::vector<AlignableDetOrUnitPtr> alignablesFromHits(const std::vector<const TransientTrackingRecHit*>& hitvec);
/// Returns vector of AlignableDetOrUnitPtr for given vector of Hits.
std::vector<AlignableDetOrUnitPtr> alignablesFromHits(const TransientTrackingRecHit::ConstRecHitContainer& hitVec);
/// return all AlignableDetOrUnitPtrs
std::vector<AlignableDetOrUnitPtr> alignableDetOrUnits();
/// Returns number of elements in map
int size(void) { return theMap.size(); }
/// Given a DetId, returns true if DetIds with this detector and subdetector id are in the map (not necessarily the exact DetId)
bool detAndSubdetInMap(const DetId& detid) const;
private:
/// Add recursively DetId-AlignableDetOrUnitPtr pairs to map.
/// Returns number of Alignables with DetId!=0 which are (illegaly) neither AlignableDet
/// nor AlignableDetUnit and are thus not added to the map.
unsigned int recursiveGetId(Alignable* alignable);
MapType theMap;
std::vector<std::pair<int, int> > theDetAndSubdet;
};
#endif
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