// =========================================================================
// @author Leonardo Florez Valencia
// @email florez-l@javeriana.edu.co
// =========================================================================
#ifndef __fpa__Functors__BaseVertexFunction__h__
#define __fpa__Functors__BaseVertexFunction__h__

#include <itkDataObject.h>
#include <itkObject.h>

namespace fpa
{
  namespace Functors
  {
    /**
     */
    template< class _TVertex >
    class LightBaseVertexFunction
      : public itk::Object
    {
    public:
      typedef _TVertex TVertex;
      typedef itk::Object                     Superclass;
      typedef LightBaseVertexFunction         Self;
      typedef itk::SmartPointer< Self >       Pointer;
      typedef itk::SmartPointer< const Self > ConstPointer;

    public:
      itkTypeMacro( fpa::Functors::LightBaseVertexFunction, itk::Object );

      itkSetConstObjectMacro( DataObject, itk::DataObject );

    public:
      template< class _TDataObject = itk::DataObject >
      const _TDataObject* GetDataObject( ) const
        {
          return(
            dynamic_cast< const _TDataObject* >(
              this->m_DataObject.GetPointer( )
              )
            );
        }

    protected:
      LightBaseVertexFunction( )
        : Superclass( ),
          m_DataObject( NULL )
        {
        }

      virtual ~LightBaseVertexFunction( )
        {
        }

    private:
      // Purposely not implemented.
      LightBaseVertexFunction( const Self& other );
      Self& operator=( const Self& other );

    protected:
      itk::DataObject::ConstPointer m_DataObject;
    };

    /**
     */
    template< class _TVertex, class _TValue >
    class BaseVertexFunction
      : public LightBaseVertexFunction< _TVertex >
    {
    public:
      typedef _TVertex TVertex;
      typedef _TValue  TValue;
      typedef LightBaseVertexFunction< _TVertex > Superclass;
      typedef BaseVertexFunction                  Self;
      typedef itk::SmartPointer< Self >           Pointer;
      typedef itk::SmartPointer< const Self >     ConstPointer;

    public:
      itkTypeMacro(
        fpa::Functors::RegionGrow::BaseVertexFunction,
        fpa::Functors::RegionGrow::LightBaseVertexFunction
        );

    public:
      virtual TValue Evaluate(
        const TVertex& vertex, const TVertex& parent
        ) const = 0;

    protected:
      BaseVertexFunction( )
        : Superclass( )
        {
        }

      virtual ~BaseVertexFunction( )
        {
        }

    private:
      // Purposely not implemented.
      BaseVertexFunction( const Self& other );
      Self& operator=( const Self& other );
    };

  } // ecapseman

} // ecapseman

#endif // __fpa__Functors__BaseVertexFunction__h__
// eof - $RCSfile$