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/usr/include/ITK-4.9/itkFEMLightObject.h is in libinsighttoolkit4-dev 4.9.0-4ubuntu1.

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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 itkFEMLightObject_h
#define itkFEMLightObject_h

#include "itkMacro.h"
#include "itkSmartPointer.h"
#include "itkObjectFactory.h"
#include "itkLightObject.h"
#include "ITKFEMExport.h"

#include "itkFEMException.h"
#include <iostream>

namespace itk
{
namespace fem
{
/**
 * \class FEMLightObject
 * \brief Base class for all classes that define the FEM system.
 *
 * Base class for all classes that define FEM system (Elements, Nodes...).
 * Every FEM object requires a global number that can be used to find
 * that object. It is also required that the object can be written to and
 * read from a file (stream). This functionality is implemented inside
 * FEMLightObject class.
 * \ingroup ITKFEM
 */
class ITKFEM_EXPORT FEMLightObject : public itk::LightObject
{
public:
  /** Standard class typedefs. */
  typedef FEMLightObject           Self;
  typedef itk::LightObject         Superclass;
  typedef Self                     Baseclass;
  typedef SmartPointer<Self>       Pointer;
  typedef SmartPointer<const Self> ConstPointer;

  /** Run-time type information (and related methods). */
  itkTypeMacro(FEMLightObject, itk::LightObject);

  /**
   * Set the global number of the object
   */
  void SetGlobalNumber(int);

  /**
  * Get the global number of the object
  */
  int GetGlobalNumber() const;

protected:

  /**
   * Default constructor
   */
  FEMLightObject() : m_GlobalNumber(-1)
  {
  }

  /**
   * Virtual destructor
   */
  virtual ~FEMLightObject()
  {
  }

  virtual void PrintSelf(std::ostream& os, Indent indent) const ITK_OVERRIDE;

  /**
   * Copy constructor must be available for the FEM objects...
   */
  FEMLightObject(const FEMLightObject & o) : itk::LightObject()
  {
    m_GlobalNumber = o.m_GlobalNumber;
  }

  /**
   * Global number of an object (ID of an object)
   * In general the ID's are required to be unique only within
   * a specific type of derived classes (Elements, Nodes, ...)
   * If the GN is not required, it can be ignored. (normally you
   * need the GN when writing or reading objects to/from stream.
   */
  int m_GlobalNumber;
};

}
}  // end namespace itk::fem

#endif // #ifndef itkFEMLightObject_h