88 lines
3.6 KiB
C++
88 lines
3.6 KiB
C++
#ifndef SQL_GIS_TRANSFORM_FUNCTOR_H_INCLUDED
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#define SQL_GIS_TRANSFORM_FUNCTOR_H_INCLUDED
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// Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License, version 2.0,
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// as published by the Free Software Foundation.
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//
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// This program is also distributed with certain software (including
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// but not limited to OpenSSL) that is licensed under separate terms,
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// as designated in a particular file or component or in included license
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// documentation. The authors of MySQL hereby grant you an additional
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// permission to link the program and your derivative works with the
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// separately licensed software that they have included with MySQL.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License, version 2.0, for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/// @file
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///
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/// This file declares the transform functor interface.
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///
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/// The functor is not intended for use directly by MySQL code. It should be
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/// used indirectly through the gis::transform() function.
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///
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/// @see gis::transform
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#include <memory> // std::unique_ptr
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#include <string>
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#include <boost/geometry.hpp>
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#include <boost/geometry/srs/transformation.hpp>
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#include "sql/gis/functor.h"
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#include "sql/gis/geometries.h"
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#include "sql/gis/geometries_traits.h"
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namespace gis {
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/// Transform functor that calls Boost.Geometry with the correct parameter
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/// types.
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///
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/// The functor throws exceptions and is therefore only intended used to
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/// implement transform or other geographic functions. It should not be used
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/// directly by other MySQL code.
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class Transform : public Unary_functor<std::unique_ptr<Geometry>> {
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private:
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/// The transformation object that holds information about input and output
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/// definitions.
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boost::geometry::srs::transformation<> m_transformation;
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/// Coordinate system of the output SRS.
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Coordinate_system m_output_cs;
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public:
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/// Create a new transform functor.
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///
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/// Theoretically, we could deduce the coordinate system of the output SRS
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/// from the old_srs_param proj4 string, but it's easier to get it from the DD
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/// SRS object on the caller side.
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///
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/// @param[in] old_srs_params The proj4 parameters of the input SRS.
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/// @param[in] new_srs_params The proj4 parameters of the output SRS.
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/// @param[in] output_cs The coordinate system of the output SRS.
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Transform(const std::string &old_srs_params,
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const std::string &new_srs_params, Coordinate_system output_cs);
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std::unique_ptr<Geometry> operator()(const Geometry &g) const override;
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std::unique_ptr<Geometry> eval(const Geometry &g) const;
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std::unique_ptr<Geometry> eval(const Geographic_point &g) const;
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std::unique_ptr<Geometry> eval(const Geographic_linestring &g) const;
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std::unique_ptr<Geometry> eval(const Geographic_polygon &g) const;
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std::unique_ptr<Geometry> eval(const Geographic_geometrycollection &g) const;
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std::unique_ptr<Geometry> eval(const Geographic_multipoint &g) const;
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std::unique_ptr<Geometry> eval(const Geographic_multilinestring &g) const;
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std::unique_ptr<Geometry> eval(const Geographic_multipolygon &g) const;
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};
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} // namespace gis
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#endif // SQL_GIS_TRANSFORM_FUNCTOR_H_INCLUDED
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