/data/refman/pasoursint/CMSSW_4_2_9_HLT1_bphpatch4/src/RecoTracker/TkNavigation/interface/SymmetricLayerFinder.h

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#ifndef TkNavigation_SymmetricLayerFinder_H
#define TkNavigation_SymmetricLayerFinder_H

#include <vector>
#include <map>

class DetLayer;
class BarrelDetLayer;
class ForwardDetLayer;

class SymmetricLayerFinder {

  typedef std::vector<ForwardDetLayer*>                   FDLC;
  typedef FDLC::iterator                                  FDLI;
  typedef FDLC::const_iterator                            ConstFDLI;
  typedef std::pair< ForwardDetLayer*, ForwardDetLayer*>  PairType;

public:

  SymmetricLayerFinder( const FDLC&);

  ForwardDetLayer* mirror( const ForwardDetLayer* layer) {
    return theForwardMap[layer];
  }

  FDLC mirror( const FDLC& input);

private:

  //  typedef map< const ForwardDetLayer*, const ForwardDetLayer*, less<const ForwardDetLayer*> >
  typedef std::map< const ForwardDetLayer*, ForwardDetLayer*, std::less<const ForwardDetLayer*> >
    ForwardMapType;

  ForwardMapType theForwardMap;

  ForwardDetLayer* mirrorPartner( const ForwardDetLayer* layer,
                                  const FDLC& rightLayers);
  

};
#endif // SymmetricLayerFinder_H