itkFEMP.h

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/*=========================================================================

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkFEMP.h,v $
  Language:  C++
  Date:      $Date: 2009-01-30 21:53:03 $
  Version:   $Revision: 1.11 $

  Copyright (c) Insight Software Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
#ifndef __itkFEMP_h
#define __itkFEMP_h

namespace itk {
namespace fem {

template<class T>
class FEMP
{
public:

  FEMP() : m_Data(0)
    {
    }

  FEMP(const FEMP& x)
    {
    if (x.m_Data)
      {
      m_Data=static_cast<T*>(&*x.m_Data->Clone());
      }
    else
      {
      m_Data=0;
      }
    }

  explicit FEMP(typename T::Pointer x) : m_Data(x)
    {}

  ~FEMP()
    {
    #ifndef FEM_USE_SMART_POINTERS
    delete m_Data;
    #endif
    }

  const FEMP& operator= (const FEMP &rhs);

  typename T::Pointer operator-> () const { return m_Data; }

  operator T * () const
    {
    return m_Data;
    }

  bool IsNULL() const
    {
    return (m_Data==0);
    }

private:

  typename T::Pointer m_Data;

};

template<class T>
const FEMP<T>& FEMP<T>::operator= (const FEMP &rhs)
{

  if (&rhs!=this) 
    {

    #ifndef FEM_USE_SMART_POINTERS
    delete m_Data;
    #else
    m_Data=0;
    #endif

    if (rhs.m_Data)
      {
      m_Data=static_cast<T*>(&*rhs.m_Data->Clone());
      }
    else
      {
      m_Data=0;
      }

    }
  return *this;
}

}} // end namespace itk::fem

#endif // #ifndef __itkFEMP_h