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

#include <fstream>

// -------------------------------------------------------------------------
template< class _TPath >
const _TPath* fpa::Common::Image::PolyLineParametricPathWriter< _TPath >::
GetInput( ) const
{
  return(
    dynamic_cast< const TPath* >(
      this->itk::ProcessObject::GetInput( 0 )
      )
    );
}

// -------------------------------------------------------------------------
template< class _TPath >
void fpa::Common::Image::PolyLineParametricPathWriter< _TPath >::
SetInput( const _TPath* path )
{
  this->itk::ProcessObject::SetNthInput( 0, const_cast< TPath* >( path ) );
}

// -------------------------------------------------------------------------
template< class _TPath >
void fpa::Common::Image::PolyLineParametricPathWriter< _TPath >::
Update( )
{
  TPath* input = const_cast< TPath* >( this->GetInput( ) );
  if( input != NULL )
  {
    input->UpdateOutputInformation( );
    input->UpdateOutputData( );
    this->GenerateData( );
    this->ReleaseInputs( );

  } // fi
}

// -------------------------------------------------------------------------
template< class _TPath >
fpa::Common::Image::PolyLineParametricPathWriter< _TPath >::
PolyLineParametricPathWriter( )
  : Superclass( ),
    m_FileName( "" )
{
  this->SetNumberOfRequiredInputs( 1 );
}

// -------------------------------------------------------------------------
template< class _TPath >
fpa::Common::Image::PolyLineParametricPathWriter< _TPath >::
~PolyLineParametricPathWriter( )
{
}

// -------------------------------------------------------------------------
template< class _TPath >
void fpa::Common::Image::PolyLineParametricPathWriter< _TPath >::
GenerateData( )
{
  const TPath* path = this->GetInput( );

  // Write base information
  std::stringstream out1, out2;
  out1 << TPath::Dimension << std::endl;
  typename TPath::TSpacing spa = path->GetSpacing( );
  for( unsigned int d = 0; d < TPath::Dimension; ++d )
    out1 << spa[ d ] << " ";
  out1 << std::endl;
  typename TPath::TDirection dir = path->GetDirection( );
  for( unsigned int d = 0; d < TPath::Dimension; ++d )
    for( unsigned int e = 0; e < TPath::Dimension; ++e )
      out1 << dir[ d ][ e ] << " ";
  out1 << std::endl;
  typename TPath::TPoint ori = path->GetOrigin( );
  for( unsigned int d = 0; d < TPath::Dimension; ++d )
    out1 << ori[ d ] << " ";
  out1 << std::endl;

  // Write path
  unsigned int size = path->GetSize( );
  out2 << size << std::endl;
  for( unsigned int i = 0; i < path->GetSize( ); ++i )
  {
    typename TPath::TIndex v = path->GetVertex( i );
    for( unsigned int d = 0; d < TPath::Dimension; ++d )
      out2 << v[ d ] << " ";

  } // rof

  // Real write
  std::ofstream file_stream( this->m_FileName.c_str( ), std::ofstream::binary );
  if( !file_stream )
    itkExceptionMacro(
      << "Unable to write skeleton to \""
      << this->m_FileName
      << "\""
      );
  file_stream.write( out1.str( ).c_str( ), out1.str( ).size( ) );
}

#endif // __fpa__Common__Image__PolyLineParametricPathWriter__hxx__

// eof - $RCSfile$