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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkAnytimeImageToImageMetric2Base.h,v $
  Language:  C++
  Date:      $Date: 2007/09/20 21:30:18 $
  Version:   $Revision: 1.2 $

  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 __itkAnytimeImageToImageMetric2Base_h
#define __itkAnytimeImageToImageMetric2Base_h
#define NUMCHANNELS 20

#include "itkArray2D.h"
#include "itkArray.h"
#include "itkTransformBase.h"


//namespace itk
//{
  
/** \class AnytimeImageToImageMetric2Base
 * Generic class to allow crosscasts in optimizers.
 */

class AnytimeImageToImageMetric2Base 
{
public:
	typedef itk::Array2D<double> HessianType;
	   typedef double MeasureType;
	   typedef itk::Array<double> DerivativeType;
	   typedef itk::Array<double> ParametersType;
		virtual void GetHessian( const ParametersType& parameters, HessianType& Hessian, const int channel ) const =0;

		virtual void GetValueAndHessian( const ParametersType& parameters, MeasureType& Value,
			HessianType& Hessian, const int channel ) const=0 ;

		/** Get the derivatives of the match measure. */
		virtual void GetDerivativeAndHessian( const ParametersType & parameters,
			DerivativeType & derivative, HessianType& Hessian, const int channel ) const=0;
		/**  Get value and derivatives for multiple valued optimizers. */
		virtual void GetValueAndDerivativeAndHessian( const ParametersType & parameters,
			MeasureType& Value, DerivativeType& Derivative, HessianType& Hessian,
			const int channel ) const=0;
		virtual itk::TransformBase::Pointer GetTransformCopy() const=0;

		virtual void GetHessian( const ParametersType& parameters, HessianType& Hessian) const=0;

		virtual void GetValueAndHessian( const ParametersType& parameters, MeasureType& Value,
			HessianType& Hessian ) const =0;

		/** Get the derivatives of the match measure. */
		virtual void GetDerivativeAndHessian( const ParametersType & parameters,
			DerivativeType & derivative, HessianType& Hessian ) const =0;
		/**  Get value and derivatives for multiple valued optimizers. */
		virtual void GetValueAndDerivativeAndHessian( const ParametersType & parameters,
			MeasureType& Value, DerivativeType& Derivative, HessianType& Hessian) const =0;

		virtual void GetHessian( const ParametersType& parameters, HessianType& Hessian, 
			const int channel, const double level ) const =0;

		virtual void GetValueAndHessian( const ParametersType& parameters, MeasureType& Value,HessianType& Hessian, 
			const int channel, const double level ) const=0 ;

		/** Get the derivatives of the match measure. */
		virtual void GetDerivativeAndHessian( const ParametersType & parameters,
			DerivativeType & derivative, HessianType& Hessian, int channel, double level ) const=0;
		/**  Get value and derivatives for multiple valued optimizers. */
		virtual void GetValueAndDerivativeAndHessian( const ParametersType & parameters,
			MeasureType& Value, DerivativeType& Derivative, HessianType& Hessian,
			int channel,double level ) const=0 ;
		virtual void GetHessian( const ParametersType& parameters, HessianType& Hessian, 
			const double level ) const=0 ;

		virtual void GetValueAndHessian( const ParametersType& parameters, MeasureType& Value,
			HessianType& Hessian, 
			const double level ) const =0;

		/** Get the derivatives of the match measure. */
		virtual void GetDerivativeAndHessian( const ParametersType & parameters,
			DerivativeType & derivative, HessianType& Hessian, double level ) const=0;
		/**  Get value and derivatives for multiple valued optimizers. */
		virtual void GetValueAndDerivativeAndHessian( const ParametersType & parameters,
			MeasureType& Value, DerivativeType& Derivative, HessianType& Hessian,
			double level ) const =0;

  AnytimeImageToImageMetric2Base(){};
  virtual ~AnytimeImageToImageMetric2Base(){};


   AnytimeImageToImageMetric2Base(const AnytimeImageToImageMetric2Base&) {}; //purposely not implemented
   void operator=(const AnytimeImageToImageMetric2Base&){}; //purposely not implemented



};

//} // end namespace itk

#endif