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 otbGeometriesSet_h
  #define otbGeometriesSet_h
  
  #include <boost/variant.hpp>
  // #include "otbOGRLayerWrapper.h"
  #include "otbOGRDataSourceWrapper.h"
  #include "otbImageReference.h"
  
  namespace otb
  {
  /**\ingroup gGeometry
   * \class GeometriesSet
   * \brief Common ITK type to manipulate any set of geometries: a \c otb::ogr::DataSource, or a \c otb::ogr::Layer.
   * \since OTB v 3.14.0
   *
   * \ingroup OTBGdalAdapters
   */
  class OTBGdalAdapters_EXPORT GeometriesSet : public itk::DataObject
    {
  public:
    /**\name Standard ITK typedefs */
    //@{
    typedef GeometriesSet                 Self;
    typedef itk::DataObject               Superclass;
    typedef itk::SmartPointer<Self>       Pointer;
    typedef itk::SmartPointer<const Self> ConstPointer;
    //@}
  
    /**\name Standard macros */
    //@{
    /** Run-time type information (and related methods). */
    itkTypeMacro(GeometriesSet, itk::DataObject);
    //@}
  
    /**\name Factory functions */
    //@{
    /** ITK method for creation through the object factory. */
    itkNewMacro(Self);
  
    /// Direct builder from an existing \c otb::DataSource.
    static Pointer New(ogr::DataSource::Pointer datasource);
    /// Direct builder from an existing \c otb::Layer.
    static Pointer New(ogr::Layer layer);
    //@}
  
    /**\name Geometries accessors */
    //@{
    void Set(ogr::DataSource::Pointer datasource);
    void Set(ogr::Layer layer);
    //@}
  
    /**\name Application of a command to a geometries set, through a visitor
     */
    //@{
    template <typename Visitor>
      typename Visitor::result_type
      /**
       * Unary visiting function to apply a visitor on any kind of geometies set.
       *
       * As a \c GeometriesSet contains either a \c otb::ogr::DataSource, or a \c
       * otb::ogr::Layer, one needs to apply a function on either kind of data.
       * This can be done thanks to a specialization of \c boost::static_visitor<>
       * that has a const \c operator() that takes either one (or two in case of
       * binary visitors) \c otb::DataSource or \c otb::Layer as parameter(s).
       *
       * \throw Whatever is thrown by the actual visitor.
       * \tparam Visitor type of the visitor functor.
       * \param[in] visitor  Functor visitor that shal derive from \c
       * boost::static_visitor.
       */
      apply(Visitor const& visitor)
        {
        return boost::apply_visitor(visitor, m_GeometriesSet);
        }
  
    /**
     * \copydoc apply(Visitor const& visitor)
     */
    template <typename Visitor>
      typename Visitor::result_type
      apply(Visitor const& visitor) const
        {
        return boost::apply_visitor(visitor, m_GeometriesSet);
        }
  
    /**
     * Binary visiting function to apply a visitor on any kind of geometies set.
     * \copydetails apply(Visitor const& visitor)
     * \param[in] visitable other geometries set to visit along side with the
     * current geometries set instance.
     */
    template <typename Visitor>
      typename Visitor::result_type
      apply(Visitor const& visitor, Self & visitable)
        {
        return boost::apply_visitor(visitor, m_GeometriesSet, visitable.m_GeometriesSet);
        }
  
    /**
     * \copydoc apply(Visitor const& visitor, Self& visitable)
     */
    template <typename Visitor>
      typename Visitor::result_type
      apply(Visitor const& visitor, Self /*const*/& visitable) const
        {
        return boost::apply_visitor(visitor, m_GeometriesSet, visitable.m_GeometriesSet);
        }
    //@}
  
  
    /** Does it contain a geometries set ?.
     */
    bool IsSet() const;
  
    /**\name Image reference (spacing + origin) */
    //@{
    typedef ogr::ImageReference<double>                            ImageReference;
    /** \em ImageReference setter. */
    void SetImageReference(ImageReference const& imageReference)
      { m_ImageReference = imageReference; }
    /** \em ImageReference getter. */
    ImageReference const& GetImageReference() const
      { return m_ImageReference; }
    //@}
  
  protected:
    /** Default constructor.
     * This actual geometries set is an in-memory \c otb::ogr::DataSource.
     * It needs to be set to a set of geometries if you expect to serialize it or
     * work on a \c otb::Layer.
     *
     * When using this construction path, you'll likelly need to \c Set() the
     * actual geometries set.
     */
    GeometriesSet();
    /** Init constructor from a \c otb::DataSource. */
    GeometriesSet(ogr::DataSource::Pointer datasource);
    /** Init constructor from a \c otb::Layer. */
    GeometriesSet(ogr::Layer layer);
  
    /** Destructor. */
    ~GeometriesSet() override;
  
    /** Prints self to stream. */
    void PrintSelf(std::ostream& os, itk::Indent indent) const override;
  private:
    typedef boost::variant<ogr::DataSource::Pointer, ogr::Layer> AnyGeometriesSetType;
    AnyGeometriesSetType m_GeometriesSet;
    ImageReference       m_ImageReference;
    };
  
  } // end namespace otb
  
  #ifndef OTB_MANUAL_INSTANTIATION
  // #include "otbGeometriesSet.hxx"
  #endif
  
  #endif // otbGeometriesSet_h
  