222 lines
8.7 KiB
C++
222 lines
8.7 KiB
C++
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#ifndef OSMIUM_GEOM_GEOS_HPP
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#define OSMIUM_GEOM_GEOS_HPP
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/*
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This file is part of Osmium (http://osmcode.org/libosmium).
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Copyright 2013,2014 Jochen Topf <jochen@topf.org> and others (see README).
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Boost Software License - Version 1.0 - August 17th, 2003
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Permission is hereby granted, free of charge, to any person or organization
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obtaining a copy of the software and accompanying documentation covered by
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this license (the "Software") to use, reproduce, display, distribute,
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execute, and transmit the Software, and to prepare derivative works of the
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Software, and to permit third-parties to whom the Software is furnished to
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do so, all subject to the following:
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The copyright notices in the Software and this entire statement, including
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the above license grant, this restriction and the following disclaimer,
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must be included in all copies of the Software, in whole or in part, and
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all derivative works of the Software, unless such copies or derivative
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works are solely in the form of machine-executable object code generated by
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a source language processor.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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*/
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#include <utility>
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#include <geos/geom/Coordinate.h>
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#include <geos/geom/CoordinateSequence.h>
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#include <geos/geom/CoordinateSequenceFactory.h>
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#include <geos/geom/GeometryFactory.h>
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#include <geos/geom/LinearRing.h>
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#include <geos/geom/MultiPolygon.h>
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#include <geos/geom/Point.h>
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#include <geos/geom/Polygon.h>
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#include <geos/geom/PrecisionModel.h>
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#include <geos/util/GEOSException.h>
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#include <osmium/geom/factory.hpp>
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#include <osmium/geom/coordinates.hpp>
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// MSVC doesn't support throw_with_nested yet
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#ifdef _MSC_VER
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# define THROW throw
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#else
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# define THROW std::throw_with_nested
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#endif
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namespace osmium {
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struct geos_geometry_error : public geometry_error {
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geos_geometry_error() :
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geometry_error("geometry creation failed in GEOS library, see nested exception for details") {
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}
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}; // struct geos_geometry_error
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namespace geom {
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namespace detail {
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class GEOSFactoryImpl {
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geos::geom::PrecisionModel m_precision_model;
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geos::geom::GeometryFactory m_geos_factory;
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std::unique_ptr<geos::geom::CoordinateSequence> m_coordinate_sequence;
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std::vector<std::unique_ptr<geos::geom::LinearRing>> m_rings;
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std::vector<std::unique_ptr<geos::geom::Polygon>> m_polygons;
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public:
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typedef std::unique_ptr<geos::geom::Point> point_type;
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typedef std::unique_ptr<geos::geom::LineString> linestring_type;
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typedef std::unique_ptr<geos::geom::Polygon> polygon_type;
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typedef std::unique_ptr<geos::geom::MultiPolygon> multipolygon_type;
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typedef std::unique_ptr<geos::geom::LinearRing> ring_type;
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explicit GEOSFactoryImpl(int srid = -1) :
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m_precision_model(),
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m_geos_factory(&m_precision_model, srid) {
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}
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/* Point */
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point_type make_point(const osmium::geom::Coordinates& xy) const {
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try {
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return point_type(m_geos_factory.createPoint(geos::geom::Coordinate(xy.x, xy.y)));
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} catch (geos::util::GEOSException&) {
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THROW(osmium::geos_geometry_error());
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}
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}
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/* LineString */
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void linestring_start() {
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try {
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m_coordinate_sequence.reset(m_geos_factory.getCoordinateSequenceFactory()->create(static_cast<size_t>(0), 2));
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} catch (geos::util::GEOSException&) {
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THROW(osmium::geos_geometry_error());
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}
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}
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void linestring_add_location(const osmium::geom::Coordinates& xy) {
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try {
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m_coordinate_sequence->add(geos::geom::Coordinate(xy.x, xy.y));
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} catch (geos::util::GEOSException&) {
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THROW(osmium::geos_geometry_error());
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}
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}
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linestring_type linestring_finish(size_t /* num_points */) {
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try {
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return linestring_type(m_geos_factory.createLineString(m_coordinate_sequence.release()));
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} catch (geos::util::GEOSException&) {
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THROW(osmium::geos_geometry_error());
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}
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}
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/* MultiPolygon */
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void multipolygon_start() {
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m_polygons.clear();
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}
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void multipolygon_polygon_start() {
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m_rings.clear();
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}
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void multipolygon_polygon_finish() {
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try {
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assert(!m_rings.empty());
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auto inner_rings = new std::vector<geos::geom::Geometry*>;
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std::transform(std::next(m_rings.begin(), 1), m_rings.end(), std::back_inserter(*inner_rings), [](std::unique_ptr<geos::geom::LinearRing>& r) {
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return r.release();
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});
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m_polygons.emplace_back(m_geos_factory.createPolygon(m_rings[0].release(), inner_rings));
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m_rings.clear();
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} catch (geos::util::GEOSException&) {
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THROW(osmium::geos_geometry_error());
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}
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}
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void multipolygon_outer_ring_start() {
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try {
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m_coordinate_sequence.reset(m_geos_factory.getCoordinateSequenceFactory()->create(static_cast<size_t>(0), 2));
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} catch (geos::util::GEOSException&) {
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THROW(osmium::geos_geometry_error());
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}
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}
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void multipolygon_outer_ring_finish() {
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try {
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m_rings.emplace_back(m_geos_factory.createLinearRing(m_coordinate_sequence.release()));
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} catch (geos::util::GEOSException&) {
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THROW(osmium::geos_geometry_error());
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}
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}
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void multipolygon_inner_ring_start() {
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try {
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m_coordinate_sequence.reset(m_geos_factory.getCoordinateSequenceFactory()->create(static_cast<size_t>(0), 2));
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} catch (geos::util::GEOSException&) {
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THROW(osmium::geos_geometry_error());
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}
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}
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void multipolygon_inner_ring_finish() {
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try {
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m_rings.emplace_back(m_geos_factory.createLinearRing(m_coordinate_sequence.release()));
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} catch (geos::util::GEOSException&) {
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THROW(osmium::geos_geometry_error());
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}
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}
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void multipolygon_add_location(const osmium::geom::Coordinates& xy) {
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try {
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m_coordinate_sequence->add(geos::geom::Coordinate(xy.x, xy.y));
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} catch (geos::util::GEOSException&) {
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THROW(osmium::geos_geometry_error());
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}
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}
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multipolygon_type multipolygon_finish() {
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try {
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auto polygons = new std::vector<geos::geom::Geometry*>;
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std::transform(m_polygons.begin(), m_polygons.end(), std::back_inserter(*polygons), [](std::unique_ptr<geos::geom::Polygon>& p) {
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return p.release();
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});
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m_polygons.clear();
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return multipolygon_type(m_geos_factory.createMultiPolygon(polygons));
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} catch (geos::util::GEOSException&) {
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THROW(osmium::geos_geometry_error());
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}
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}
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}; // class GEOSFactoryImpl
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} // namespace detail
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template <class TProjection = IdentityProjection>
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using GEOSFactory = GeometryFactory<osmium::geom::detail::GEOSFactoryImpl, TProjection>;
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} // namespace geom
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} // namespace osmium
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#undef THROW
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#endif // OSMIUM_GEOM_GEOS_HPP
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