/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_7/src/RecoVertex/VertexPrimitives/interface/BasicVertexState.h

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#ifndef BasicVertexState_H
#define BasicVertexState_H

#include "TrackingTools/TrajectoryState/interface/ProxyBase.h"
#include "DataFormats/GeometrySurface/interface/ReferenceCounted.h"
#include "TrackingTools/TrajectoryState/interface/CopyUsingClone.h"

#include "DataFormats/GeometryVector/interface/GlobalPoint.h"
#include "DataFormats/GeometryCommonDetAlgo/interface/GlobalError.h"
#include "DataFormats/GeometryCommonDetAlgo/interface/GlobalWeight.h"
//#include "CommonReco/CommonVertex/interface/RefCountedVertexSeed.h"

#include <vector>

class VertexState;

class BasicVertexState  : public ReferenceCounted {

public:

  typedef ProxyBase< BasicVertexState, CopyUsingClone<BasicVertexState> > Proxy;
  typedef ReferenceCountingPointer<BasicVertexState>                      RCPtr;

private:
  //
  // HELP !  new G++ refuses friend class Proxy;
  //
  friend class   ProxyBase< BasicVertexState, CopyUsingClone<BasicVertexState> >;
  friend  class ReferenceCountingPointer<BasicVertexState>                ;

public:

  virtual ~BasicVertexState() {}

  virtual BasicVertexState* clone() const = 0;

  virtual GlobalPoint position() const = 0;
  virtual GlobalError error() const = 0;
  virtual GlobalWeight weight() const = 0;
  virtual AlgebraicVector3 weightTimesPosition() const = 0;
  virtual double weightInMixture() const = 0;
  virtual std::vector<VertexState> components() const;
  virtual bool isValid() const = 0;


//   virtual RefCountedVertexSeed seedWithoutTracks() const = 0;
};

#endif