itkAdaptImageFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkAdaptImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2009-04-01 14:36:06 $
  Version:   $Revision: 1.19 $

  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 __itkAdaptImageFilter_h
#define __itkAdaptImageFilter_h

#include "itkUnaryFunctorImageFilter.h"

namespace itk
{

namespace Functor {  
  
template <class TInput, class TAccessor>
class AccessorFunctor
{
public:
  typedef AccessorFunctor Self;
  typedef TAccessor       AccessorType;

  AccessorFunctor(): m_Accessor() {}
  ~AccessorFunctor() {}

  typedef typename TAccessor::ExternalType OutputType;
  inline OutputType operator() ( const TInput & A ) const
    {
    return m_Accessor.Get( A );
    }

  AccessorType& GetAccessor() 
    {
    return m_Accessor;
    }

  AccessorFunctor & operator=( const AccessorFunctor & functor )
    {
    m_Accessor = functor.m_Accessor; 
    return *this;
    }

  void SetAccessor(AccessorType& accessor) 
    {
    m_Accessor = accessor;
    }

  bool operator!=( const Self& functor ) const
    {
    return (m_Accessor != functor.m_Accessor);
    }
  bool operator==( const Self& other ) const
    {
    return !(*this != other);
    }

private:
  AccessorType m_Accessor;
}; 
}

template <class TInputImage, class TOutputImage, class TAccessor>
class ITK_EXPORT AdaptImageFilter:
    public UnaryFunctorImageFilter<TInputImage,TOutputImage,Functor::AccessorFunctor<ITK_TYPENAME TInputImage::PixelType, TAccessor> >
{
public:
  typedef AdaptImageFilter  Self;

  typedef UnaryFunctorImageFilter< TInputImage,
                                   TOutputImage,
                                   Functor::AccessorFunctor<
    ITK_TYPENAME TInputImage::PixelType, 
    TAccessor> >  Superclass;

  typedef SmartPointer<Self>               Pointer;
  typedef SmartPointer<const Self>         ConstPointer;
  typedef typename Superclass::FunctorType FunctorType;

  itkNewMacro(Self);

  typedef TAccessor AccessorType;

  itkTypeMacro(AdaptImageFilter, UnaryFunctorImageFilter);

  AccessorType& GetAccessor() { return this->GetFunctor().GetAccessor(); };

  void SetAccessor(AccessorType& accessor)
    {
    FunctorType functor;
    functor = this->GetFunctor();
    if (accessor != functor.GetAccessor())
      {
      functor.SetAccessor( accessor );
      this->SetFunctor( functor );
      this->Modified();
      }
    }

protected:
  AdaptImageFilter() {}
  virtual ~AdaptImageFilter() {}

private:
  AdaptImageFilter(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented

};

  
} // end namespace itk
  
#endif