140 lines
3.8 KiB
C++
140 lines
3.8 KiB
C++
/**********************************************************************
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*
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* GEOS - Geometry Engine Open Source
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* http://geos.osgeo.org
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*
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* Copyright (C) 2021 Jared Erickson
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*
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* This is free software; you can redistribute and/or modify it under
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* the terms of the GNU Lesser General Public Licence as published
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* by the Free Software Foundation.
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* See the COPYING file for more information.
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*
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**********************************************************************/
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#pragma once
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#include <geos/export.h>
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#include "GeoJSON.h"
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#include <string>
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#include <cctype>
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#include "geos/vend/include_nlohmann_json.hpp"
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#ifdef _MSC_VER
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#pragma warning(push)
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#pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
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#endif
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// Forward declarations
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namespace geos {
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namespace geom {
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class Coordinate;
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class CoordinateSequence;
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class Geometry;
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class GeometryCollection;
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class Point;
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class LineString;
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class LinearRing;
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class Polygon;
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class MultiPoint;
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class MultiLineString;
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class MultiPolygon;
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class PrecisionModel;
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}
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namespace io {
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class Writer;
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}
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}
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namespace geos {
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namespace io {
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enum class GeoJSONType {
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GEOMETRY, FEATURE, FEATURE_COLLECTION
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};
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/**
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* \class GeoJSONWriter
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*
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* \brief Outputs the GeoJSON representation of a Geometry.
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* See also GeoJSONReader for parsing.
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*
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*/
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class GEOS_DLL GeoJSONWriter {
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public:
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~GeoJSONWriter() = default;
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std::string write(const geom::Geometry* geometry, GeoJSONType type = GeoJSONType::GEOMETRY);
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std::string writeFormatted(const geom::Geometry* geometry, GeoJSONType type = GeoJSONType::GEOMETRY, int indent = 4);
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std::string write(const GeoJSONFeature& feature);
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std::string write(const GeoJSONFeatureCollection& features);
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/*
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* \brief
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* Returns the output dimension used by the
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* <code>GeoJSONWriter</code>.
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*/
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int
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getOutputDimension() const
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{
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return defaultOutputDimension;
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}
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/*
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* Sets the output dimension used by the <code>GeoJSONWriter</code>.
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*
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* @param newOutputDimension Supported values are 2 or 3.
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* Default since GEOS 3.12 is 3.
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* Note that 3 indicates up to 3 dimensions will be
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* written but 2D GeoJSON is still produced for 2D geometries.
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*/
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void setOutputDimension(uint8_t newOutputDimension);
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private:
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uint8_t defaultOutputDimension = 3;
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std::vector<double> convertCoordinate(const geom::Coordinate* c);
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std::vector<std::vector<double>> convertCoordinateSequence(const geom::CoordinateSequence* c);
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void encode(const geom::Geometry* g, GeoJSONType type, geos_nlohmann::ordered_json& j);
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void encodeGeometry(const geom::Geometry* g, geos_nlohmann::ordered_json& j);
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void encodePoint(const geom::Point* p, geos_nlohmann::ordered_json& j);
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void encodeLineString(const geom::LineString* l, geos_nlohmann::ordered_json& j);
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void encodePolygon(const geom::Polygon* p, geos_nlohmann::ordered_json& j);
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void encodeMultiPoint(const geom::MultiPoint* p, geos_nlohmann::ordered_json& j);
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void encodeMultiLineString(const geom::MultiLineString* l, geos_nlohmann::ordered_json& j);
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void encodeMultiPolygon(const geom::MultiPolygon* m, geos_nlohmann::ordered_json& j);
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void encodeGeometryCollection(const geom::GeometryCollection* g, geos_nlohmann::ordered_json& j);
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void encodeFeature(const geom::Geometry* g, geos_nlohmann::ordered_json& j);
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void encodeFeatureCollection(const geom::Geometry* g, geos_nlohmann::ordered_json& j);
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void encodeFeature(const GeoJSONFeature& feature, geos_nlohmann::ordered_json& j);
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void encodeGeoJSONValue(const std::string& key, const GeoJSONValue& value, geos_nlohmann::ordered_json& j);
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};
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} // namespace geos::io
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} // namespace geos
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#ifdef _MSC_VER
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#pragma warning(pop)
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#endif
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