sitkHashImageFilter.h

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/*=========================================================================
 *
 *  Copyright NumFOCUS
 *
 *  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 sitkHashImageFilter_h
#define sitkHashImageFilter_h
 
#include "sitkMacro.h"
#include "sitkMemberFunctionFactory.h"
#include "sitkImage.h"
#include "sitkBasicFilters.h"
#include "sitkImageFilter.h"
#include "sitkProcessObject.h"
 
namespace itk::simple
{

class SITKBasicFilters_EXPORT HashImageFilter : public ProcessObject
{
public:
  using Self = HashImageFilter;
 
  // function pointer type
  typedef std::string (Self::*MemberFunctionType)(const Image &);
 
  // this filter works with all itk::Image and itk::VectorImage types.
  using PixelIDTypeList = typelist2::append<BasicPixelIDTypeList, ComplexPixelIDTypeList, VectorPixelIDTypeList>::type;
 
  ~HashImageFilter() override;
 
  HashImageFilter();
 
  enum HashFunction
  {
    SHA1,
    MD5
  };
  void
  SetHashFunction(HashFunction hashFunction);
  HashFunction
  GetHashFunction() const;

  std::string
  GetName() const override
  {
    return std::string("Hash");
  }
 
  // Print ourselves out
  std::string
  ToString() const override;
 
  std::string
  Execute(const Image &);
 
 
private:
  HashFunction m_HashFunction{ SHA1 };
 
  template <class TImageType>
  std::string
  ExecuteInternal(const Image & image);
  template <class TImageType>
  std::string
  ExecuteInternalLabelImage(const Image & image);
 
  // friend to get access to executeInternal member
  friend struct detail::MemberFunctionAddressor<MemberFunctionType>;
  friend struct detail::ExecuteInternalLabelImageAddressor<MemberFunctionType>;
 
  static const detail::MemberFunctionFactory<MemberFunctionType> &
  GetMemberFunctionFactory();
};
 
SITKBasicFilters_EXPORT std::string
                        Hash(const Image & image, HashImageFilter::HashFunction function = HashImageFilter::SHA1);
} // namespace itk::simple
#endif