/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef __itkParametricImageSource_h
#define __itkParametricImageSource_h

#include "itkGenerateImageSource.h"

#include "itkArray.h"

namespace itk
{

/** \class ParametricImageSource
 * \brief Base class for all parametric image sources.
 *
 * This abstract class specifies an interface than enables parameters
 * to be set through a vector of values using the
 * SetParameters() method. This interface makes it easier to include
 * parameterized image sources within ITK's
 * optimization/registration framework.
 *
 * Concrete subclasses must impelement the methods SetParameters(),
 * GetParameters() and GetNumberOfParameters().
 *
 * \ingroup DataSources
 * \ingroup ITKImageSources
 */
template <typename TOutputImage>
class ParametricImageSource
  : public GenerateImageSource< TOutputImage >
{
public:
  /** Standard class typedefs. */
  typedef ParametricImageSource             Self;
  typedef GenerateImageSource<TOutputImage> Superclass;
  typedef SmartPointer<Self>                Pointer;
  typedef SmartPointer<const Self>          ConstPointer;

  /** Smart Pointer type to a DataObject. */
  typedef DataObject::Pointer DataObjectPointer;

  /** Some convenient typedefs. */
  typedef TOutputImage                        OutputImageType;
  typedef typename OutputImageType::Pointer   OutputImagePointer;
  typedef typename OutputImageType::PixelType OutputImagePixelType;

  typedef double                              ParametersValueType;
  typedef Array< ParametersValueType >        ParametersType;

   /** ImageDimension constant */
  itkStaticConstMacro(OutputImageDimension,
                      unsigned int,
                      TOutputImage::ImageDimension);

  /** Run-time type information (and related methods). */
  itkTypeMacro(ParametricImageSource, GenerateImageSource);

  /** Set the parameters for this source. Setting the parameters does
   * not mark the image source as modified; subclasses should override
   * this method to forward parameters through setters that call
   * Modified(). */
  virtual void SetParameters( const ParametersType & parameters ) = 0;

  /** Get the parameters for this source. */
  virtual ParametersType GetParameters() const = 0;

  /** Get the number of parameters. */
  virtual unsigned int GetNumberOfParameters() const = 0;

protected:
  ParametricImageSource() {};
  virtual ~ParametricImageSource() {}
  void PrintSelf(std::ostream& os, Indent indent) const;

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

};
} // end namespace itk


#ifndef ITK_MANUAL_INSTANTIATION
#include "itkParametricImageSource.hxx"
#endif

#endif
