freValidityTag.h

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

  Program:   F.R.E.E. - flexible registration evaluation engine
  Version:   v.1.0.0
  Date:      $Date: 2006/09/01 12:00:00 $
  Module:    $RCSfile: freValidityTag.h,v $
  Language:  C++


  Copyright (c) 2007 Ralf o Floca (Department of Medical Informatics,
  Institute for Medical Biometry and Informatics, University of Heidelberg,
  Germany). All rights reserved.
  See FREECopyright.txt or http://www.mi.med.uni-hd.de/free/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 __freValidityTag_h
#define __freValidityTag_h

#include "freExceptions.h"

#include "itkLightObject.h"

#include <time.h>

namespace FREE
{

class ValidityTag : public itk::LightObject
{
public:
  typedef ValidityTag                    Self;
  typedef itk::LightObject               Superclass;
  typedef itk::SmartPointer<Self>        Pointer;
  typedef itk::SmartPointer<const Self>  ConstPointer;

  typedef clock_t TagType;

  itkTypeMacro(ValidityTag, LightObject);
  itkNewMacro(ValidityTag);

  static Pointer New(const ValidityTag& tag);
  static Pointer New(const TagType& tag);
  static Pointer NewNull();

  bool IsOutdated(const ValidityTag& referenceTag) const;
  bool IsOutdated(const ValidityTag* pReferenceTag) const;
  bool IsUpdated(const ValidityTag& referenceTag) const;
  bool IsUpdated(const ValidityTag* pReferenceTag) const;
  bool Equals(const ValidityTag& referenceTag) const;
  bool Equals(const ValidityTag* pReferenceTag) const;

  void Actualize();

  void SetTag (const ValidityTag& tag);
  void SetTag (const ValidityTag* pTag);

  void SetTimeStamp (const TagType& tag);
  const TagType& GetTimeStamp () const;

protected:
  ValidityTag();

  TagType m_Tag;
};

} //end of namespace FREE

#endif

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