text: /*
   * Copyright (C) 2005-2019 Centre National d'Etudes Spatiales (CNES)
   *
   * This file is part of Orfeo Toolbox
   *
   *     https://www.orfeo-toolbox.org/
   *
   * 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
   *
   * 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 otbPathFunction_h
  #define otbPathFunction_h
  
  #include "itkFunctionBase.h"
  
  namespace otb
  {
  
  /** \class PathFunction
   * \brief Evaluates a function of an image over a specific path.
   *
   * PathFunction is a baseclass for all objects that evaluates
   * a function of an image using a path list.
   * This class is templated over the input image type, the path type
   * and the function output and the coordinate representation type
   * (e.g. float or double).
   *
   * The input path is set via method SetInputPath().
   *
   *
   * \sa Path
   *
   * \ingroup PathFunction
   *
   * \ingroup OTBPath
   */
  template <class TInputPath, class TOutput>
  class ITK_EXPORT PathFunction : public itk::FunctionBase<TInputPath, TOutput>
  {
  public:
    /** Standard class typedefs. */
    typedef PathFunction Self;
    typedef itk::FunctionBase<TInputPath, TOutput> Superclass;
    typedef itk::SmartPointer<Self>       Pointer;
    typedef itk::SmartPointer<const Self> ConstPointer;
  
    /** Run-time type information (and related methods). */
    itkTypeMacro(PathFunction, itk::FunctionBase);
  
    /** InputPathType typedef support. */
    typedef typename Superclass::InputType InputPathType;
  
    /** InputPathPointer typedef support */
    typedef typename InputPathType::ConstPointer InputPathConstPointer;
  
    /** OutputType typedef support. */
    typedef typename Superclass::OutputType OutputType;
  
    /** Set the input path. */
    virtual void SetInputPath(const InputPathType* ptr);
  
    /** Get the input path. */
    const InputPathType* GetInputPath() const
    {
      return m_Path.GetPointer();
    }
  
  protected:
    PathFunction();
    ~PathFunction() override
    {
    }
    void PrintSelf(std::ostream& os, itk::Indent indent) const override;
  
    InputPathConstPointer m_Path;
  
  private:
    PathFunction(const Self&) = delete;
    void operator=(const Self&) = delete;
  };
  
  } // namespace otb
  
  #ifndef OTB_MANUAL_INSTANTIATION
  #include "otbPathFunction.hxx"
  #endif
  
  #endif
  