itkFastMarchingNumberOfElementsStoppingCriterion.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
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 *         http://www.apache.org/licenses/LICENSE-2.0.txt
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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:
  typedef FastMarchingNumberOfElementsStoppingCriterion         Self;
  typedef FastMarchingStoppingCriterionBase< TInput, TOutput >  Superclass;
  typedef SmartPointer< Self >                                  Pointer;
  typedef SmartPointer< const Self >                            ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro(FastMarchingNumberOfElementsStoppingCriterion,
                FastMarchingStoppingCriterionBase );

  typedef typename Superclass::OutputPixelType  OutputPixelType;
  typedef typename Superclass::NodeType         NodeType;

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

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

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

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

  ~FastMarchingNumberOfElementsStoppingCriterion() {}

  IdentifierType  m_CurrentNumberOfElements;
  IdentifierType  m_TargetNumberOfElements;

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

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

private:
  FastMarchingNumberOfElementsStoppingCriterion( const Self& );
  void operator = ( const Self& );
};

}
#endif // __itkFastMarchingNumberOfElementsStoppingCriterion_h