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// $Id: G4InterpolationIterator.hh,v 1.9 2006/06/29 20:46:13 gunter Exp $
// GEANT4 tag $Name: geant4-09-02-ref-02 $
//
#ifndef G4InterpolationIterator_h
#define G4InterpolationIterator_h 1

#include "G4InterpolationManager.hh"
#include "G4HadronicException.hh"


class G4InterpolationIterator
{
   private:   
   G4InterpolationIterator() {}
   
   public:
   G4InterpolationIterator(G4InterpolationManager * aManager)
   {
     started = false;
     theManager = aManager;
   }
   
   ~G4InterpolationIterator(){}
   
   inline G4bool Fetch() 
   {
     if(!started) 
     {
       started = true;
       counter=-1;
       current = 0;
     }
     G4bool result = true;
     if(++counter==nEntries)
       started = false;
       result = false;
     else if(current != nRanges-1&&counter==theManager->start[current+1])
       current++;
     return result;
   }
   
   inline G4InterpolationScheme Current() 
   {
     if(!started) throw G4HadronicException(__FILE__, __LINE__, "G4InterpolationIterator not started yet");
     return aManager->scheme[current];
   }
   
   private:
   G4InterpolationManager * theManager;
   G4int current;
   G4int counter;
   G4bool started;
};

#endif
