GeoJSON.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2021 Jared Erickson
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Public Licence as published
 * by the Free Software Foundation.
 * See the COPYING file for more information.
 *
 **********************************************************************/
 
#ifndef GEOS_IO_GEOJSON_H
#define GEOS_IO_GEOJSON_H
 
#include <geos/export.h>
 
#include <map>
#include <vector>
#include <string>
#include <sstream>
#include <cctype>
#include <cstddef>
#include <geos/geom/Geometry.h>
 
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
#endif
 
namespace geos {
namespace geom {
class Geometry;
}
}
 
namespace geos {
namespace io {
 
class GEOS_DLL GeoJSONValue {
 
private:
 
    enum class Type { NUMBER, STRING, NULLTYPE, BOOLEAN, OBJECT, ARRAY };
 
    Type type;
 
    union {
        double d;
        std::string s;
        std::nullptr_t n;
        bool b;
        std::map<std::string, GeoJSONValue> o;
        std::vector<GeoJSONValue> a;
    };
 
    void cleanup();
 
public:
 
    struct GeoJSONTypeError {};
 
    GeoJSONValue(double);
    GeoJSONValue(const std::string&);
    GeoJSONValue();
    GeoJSONValue(bool);
    GeoJSONValue(const std::map<std::string, GeoJSONValue>&);
    GeoJSONValue(const std::vector<GeoJSONValue>&);
 
    ~GeoJSONValue();
    GeoJSONValue(const GeoJSONValue&);
    GeoJSONValue& operator=(const GeoJSONValue&);
 
    double getNumber() const;
    const std::string& getString() const;
    std::nullptr_t getNull() const;
    bool getBoolean() const;
    const std::map<std::string, GeoJSONValue>& getObject() const;
    const std::vector<GeoJSONValue>& getArray() const;
 
    bool isNumber() const;
    bool isString() const;
    bool isNull() const;
    bool isBoolean() const;
    bool isObject() const;
    bool isArray() const;
 
};
 
class GEOS_DLL GeoJSONFeature {
 
public:
 
    GeoJSONFeature(std::unique_ptr<geom::Geometry> g,
                   const std::map<std::string, GeoJSONValue>& p);
 
    GeoJSONFeature(std::unique_ptr<geom::Geometry> g,
                   std::map<std::string, GeoJSONValue>&& p);
 
    GeoJSONFeature(GeoJSONFeature const& other);
 
    GeoJSONFeature(GeoJSONFeature&& other);
 
    GeoJSONFeature& operator=(const GeoJSONFeature&);
 
    GeoJSONFeature& operator=(GeoJSONFeature&&);
 
    const geom::Geometry* getGeometry() const;
 
    const std::map<std::string, GeoJSONValue>& getProperties() const;
 
private:
 
    std::unique_ptr<geom::Geometry> geometry;
 
    std::map<std::string, GeoJSONValue> properties;
 
};
 
class GEOS_DLL GeoJSONFeatureCollection {
 
public:
 
    GeoJSONFeatureCollection(const std::vector<GeoJSONFeature>& f);
 
    GeoJSONFeatureCollection(std::vector<GeoJSONFeature>&& f);
 
    const std::vector<GeoJSONFeature>& getFeatures() const;
 
private:
 
    std::vector<GeoJSONFeature> features;
 
};
 
} // namespace geos::io
} // namespace geos
 
#ifdef _MSC_VER
#pragma warning(pop)
#endif
 
#endif // #ifndef GEOS_IO_GEOJSON_H