itkFastMarchingNumberOfElementsStoppingCriterion.h

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 *  Copyright Insight Software Consortium
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 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
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#ifndef itkFastMarchingNumberOfElementsStoppingCriterion_h
#define itkFastMarchingNumberOfElementsStoppingCriterion_h

#include "itkFastMarchingStoppingCriterionBase.h"
#include "itkObjectFactory.h"

namespace itk
{
template< typename TInput, typename TOutput >
class FastMarchingNumberOfElementsStoppingCriterion :
public FastMarchingStoppingCriterionBase< TInput, TOutput >
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(FastMarchingNumberOfElementsStoppingCriterion);

  using Self = FastMarchingNumberOfElementsStoppingCriterion;
  using Superclass = FastMarchingStoppingCriterionBase< TInput, TOutput >;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  itkNewMacro(Self);

  itkTypeMacro(FastMarchingNumberOfElementsStoppingCriterion,
                FastMarchingStoppingCriterionBase );

  using OutputPixelType = typename Superclass::OutputPixelType;
  using NodeType = typename Superclass::NodeType;

  itkSetMacro( TargetNumberOfElements, IdentifierType );
  itkGetMacro( TargetNumberOfElements, IdentifierType );

  bool IsSatisfied() const override
  {
    return ( this->m_CurrentNumberOfElements >= this->m_TargetNumberOfElements );
  }

  std::string GetDescription() const override
  {
    return "Current Number of Elements >= Target Number of Elements";
  }

protected:
  FastMarchingNumberOfElementsStoppingCriterion() : Superclass(),
    m_CurrentNumberOfElements( NumericTraits< IdentifierType >::ZeroValue() ),
    m_TargetNumberOfElements( NumericTraits< IdentifierType >::ZeroValue() )
  {}

  ~FastMarchingNumberOfElementsStoppingCriterion() override = default;

  IdentifierType  m_CurrentNumberOfElements;
  IdentifierType  m_TargetNumberOfElements;

  void SetCurrentNode( const NodeType& ) override
  {
    ++this->m_CurrentNumberOfElements;
  }

  void Reset() override
  {
    this->m_CurrentNumberOfElements = NumericTraits< IdentifierType >::ZeroValue();
  }
};

}
#endif // itkFastMarchingNumberOfElementsStoppingCriterion_h