itkExhaustiveOptimizer.h

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 *
 *  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
 *
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 *  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.
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 *=========================================================================*/
#ifndef __itkExhaustiveOptimizer_h
#define __itkExhaustiveOptimizer_h

#include "itkIntTypes.h"
#include "itkSingleValuedNonLinearOptimizer.h"

namespace itk
{
class ExhaustiveOptimizer:
  public SingleValuedNonLinearOptimizer
{
public:
  typedef ExhaustiveOptimizer            Self;
  typedef SingleValuedNonLinearOptimizer Superclass;
  typedef SmartPointer< Self >           Pointer;
  typedef SmartPointer< const Self >     ConstPointer;

  typedef Array< SizeValueType > StepsType;
  itkNewMacro(Self);

  itkTypeMacro(ExhaustiveOptimizer, SingleValuedNonLinearOptimizer);

  virtual void    StartOptimization(void) ITK_OVERRIDE;

  void StartWalking(void);

  void ResumeWalking(void);

  void StopWalking(void);

  itkSetMacro(StepLength, double);
  itkSetMacro(NumberOfSteps, StepsType);
  itkGetConstReferenceMacro(StepLength, double);
  itkGetConstReferenceMacro(NumberOfSteps, StepsType);
  itkGetConstReferenceMacro(CurrentValue, MeasureType);
  itkGetConstReferenceMacro(MaximumMetricValue, MeasureType);
  itkGetConstReferenceMacro(MinimumMetricValue, MeasureType);
  itkGetConstReferenceMacro(MinimumMetricValuePosition, ParametersType);
  itkGetConstReferenceMacro(MaximumMetricValuePosition, ParametersType);
  itkGetConstReferenceMacro(CurrentIndex, ParametersType);
  itkGetConstReferenceMacro(MaximumNumberOfIterations, SizeValueType);

  virtual const std::string GetStopConditionDescription() const ITK_OVERRIDE;

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

  void AdvanceOneStep(void);

  void IncrementIndex(ParametersType & param);

protected:
  MeasureType m_CurrentValue;

  StepsType m_NumberOfSteps;

  SizeValueType m_CurrentIteration;

  bool m_Stop;

  unsigned int m_CurrentParameter;

  double m_StepLength;

  ParametersType m_CurrentIndex;

  SizeValueType m_MaximumNumberOfIterations;

  MeasureType m_MaximumMetricValue;

  MeasureType m_MinimumMetricValue;

  ParametersType m_MinimumMetricValuePosition;

  ParametersType m_MaximumMetricValuePosition;

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

  std::ostringstream m_StopConditionDescription;
};
} // end namespace itk

#endif