itkNeighborhoodAccessorFunctor.h

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/*=========================================================================

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkNeighborhoodAccessorFunctor.h,v $
  Language:  C++
  Date:      $Date: 2009-04-21 15:46:16 $
  Version:   $Revision: 1.3 $

  Copyright (c) Insight Software Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
#ifndef __itkNeighborhoodAccessorFunctor_h
#define __itkNeighborhoodAccessorFunctor_h

#include "itkImageBoundaryCondition.h"
#include "itkNeighborhood.h"
#include "itkImageBase.h" 

namespace itk
{
 
template< class TImage >
class NeighborhoodAccessorFunctor
{
public:
  typedef TImage                                ImageType;
  typedef typename ImageType::PixelType         PixelType;
  typedef typename ImageType::InternalPixelType InternalPixelType;
  typedef unsigned int                          VectorLengthType;
  typedef typename ImageType::OffsetType        OffsetType;

  typedef Neighborhood< InternalPixelType *,
          ::itk::GetImageDimension< TImage >::ImageDimension > NeighborhoodType;
  
  typedef ImageBoundaryCondition< ImageType > const *
                          ImageBoundaryConditionConstPointerType;
  
  inline void SetBegin( const InternalPixelType *) {}
  
  inline PixelType Get( const InternalPixelType *pixelPointer ) const
    { 
    return (*pixelPointer);
    }

  inline void Set( InternalPixelType* &pixelPointer, const PixelType &p ) const
    {
    *pixelPointer = p;
    }
  
  inline PixelType BoundaryCondition( 
      const OffsetType& point_index,
      const OffsetType &boundary_offset, 
      const NeighborhoodType *data,
      const ImageBoundaryConditionConstPointerType boundaryCondition) const
    {
    return boundaryCondition->operator()(point_index, boundary_offset, data);
    }
  
  void SetVectorLength( VectorLengthType length ) {}
  VectorLengthType SetVectorLength() { return 0; }

  NeighborhoodAccessorFunctor() {}
  
  virtual ~NeighborhoodAccessorFunctor() {}

};

} // end namespace itk
#endif