itkFEMP.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
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef __itkFEMP_h
#define __itkFEMP_h

#include <iostream>

namespace itk
{
namespace fem
{
template <class T>
class FEMP
{
public:

  FEMP() : m_Data(0)
  {
  }

  FEMP(const FEMP & x)
  {
    if( x.m_Data )
      {
#ifdef USE_FEM_CLONE
      m_Data = static_cast<T *>( x.m_Data->Clone().GetPointer() );
#else
      std::cout << "Create Another" << std::endl;
      m_Data = static_cast<T *>( x.m_Data->CreateAnother().GetPointer() );
#endif
      }
    else
      {
      m_Data = 0;
      }
  }

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

  ~FEMP()
  {
    m_Data = 0;
  }

  const FEMP<T> & operator=(const FEMP<T> & 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<T> & rhs)
{
  if( &rhs != this )
    {

    m_Data = 0;

    if( rhs.m_Data )
      {
#ifdef USE_FEM_CLONE
      m_Data = static_cast<T *>( rhs.m_Data->Clone().GetPointer() );
#else
      m_Data = static_cast<T *>( rhs.m_Data->CreateAnother().GetPointer() );
#endif


      }
    else
      {
      m_Data = 0;
      }
    }
  return *this;
}

}
}  // end namespace itk::fem

#endif // #ifndef __itkFEMP_h