text: /*=========================================================================
   *
   *  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 itkChangeLabelLabelMapFilter_h
  #define itkChangeLabelLabelMapFilter_h
  
  #include "itkInPlaceLabelMapFilter.h"
  #include <map>
  
  namespace itk
  {
  /**
   *\class ChangeLabelLabelMapFilter
   * \brief  Replace the label Ids of selected LabelObjects with new label Ids.
   *
   * This filter takes as input a label map and a list of pairs of Label Ids, to
   * produce as output a new label map where the label Ids have been replaced
   * according to the pairs in the list.
   *
   * Labels that are relabeled to the same label Id are automatically
   * merged and optimized into a single LabelObject. The background
   * label can also be changed. Any object relabeled to the output
   * background will automatically be removed.
   *
   * This implementation was taken from the Insight Journal paper:
   * https://hdl.handle.net/1926/584  or
   * http://www.insight-journal.org/browse/publication/176
   *
   * \author Gaetan Lehmann. Biologie du Developpement et de la Reproduction, INRA de Jouy-en-Josas, France.
   *
   * \sa ShapeLabelObject, RelabelComponentImageFilter, ChangeLabelImageFilter
   * \ingroup ImageEnhancement  MathematicalMorphologyImageFilters
   * \ingroup ITKLabelMap
   */
  template <typename TImage>
  class ITK_TEMPLATE_EXPORT ChangeLabelLabelMapFilter : public InPlaceLabelMapFilter<TImage>
  {
  public:
    ITK_DISALLOW_COPY_AND_MOVE(ChangeLabelLabelMapFilter);
  
    /** Standard class type aliases. */
    using Self = ChangeLabelLabelMapFilter;
    using Superclass = InPlaceLabelMapFilter<TImage>;
    using Pointer = SmartPointer<Self>;
    using ConstPointer = SmartPointer<const Self>;
  
    /** Some convenient type alias. */
    using ImageType = TImage;
    using ImagePointer = typename ImageType::Pointer;
    using ImageConstPointer = typename ImageType::ConstPointer;
    using PixelType = typename ImageType::PixelType;
    using IndexType = typename ImageType::IndexType;
    using LabelObjectType = typename ImageType::LabelObjectType;
  
    /** ImageDimension constants */
    static constexpr unsigned int ImageDimension = TImage::ImageDimension;
  
    /** Standard New method. */
    itkNewMacro(Self);
  
    /** Runtime information support. */
    itkTypeMacro(ChangeLabelLabelMapFilter, InPlaceLabelMapFilter);
  
    using ChangeMapType = typename std::map<PixelType, PixelType>;
    using ChangeMapIterator = typename ChangeMapType::const_iterator;
  
  #ifdef ITK_USE_CONCEPT_CHECKING
    // Begin concept checking
  /*  itkConceptMacro(InputEqualityComparableCheck,
      (Concept::EqualityComparable<InputImagePixelType>));
    itkConceptMacro(IntConvertibleToInputCheck,
      (Concept::Convertible<int, InputImagePixelType>));
    itkConceptMacro(InputOStreamWritableCheck,
      (Concept::OStreamWritable<InputImagePixelType>));*/
  // End concept checking
  #endif
  
    /**
     */
    void
    SetChangeMap(const ChangeMapType & changeMap);
  
    const ChangeMapType &
    GetChangeMap() const;
  
    void
    SetChange(const PixelType & oldLabel, const PixelType & newLabel);
  
    void
    ClearChangeMap();
  
  protected:
    ChangeLabelLabelMapFilter() = default;
    ~ChangeLabelLabelMapFilter() override = default;
  
    void
    GenerateData() override;
  
    void
    PrintSelf(std::ostream & os, Indent indent) const override;
  
    ChangeMapType m_MapOfLabelToBeReplaced;
  }; // end of class
  } // end namespace itk
  
  #ifndef ITK_MANUAL_INSTANTIATION
  #  include "itkChangeLabelLabelMapFilter.hxx"
  #endif
  
  #endif
  