GeoJSON.cpp

/**********************************************************************
 *
 * 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.
 *
 **********************************************************************/

#include <geos/io/GeoJSON.h>

namespace geos {
namespace io { // geos.io

// GeoJSONValue

GeoJSONValue::GeoJSONValue(double value)
{
    type = Type::NUMBER;
    d = value;
}

GeoJSONValue::GeoJSONValue(const std::string& value)
{
    type = Type::STRING;
    new (&s) std::string{value};
}

GeoJSONValue::GeoJSONValue()
{
    type = Type::NULLTYPE;
    n = nullptr;
}

GeoJSONValue::GeoJSONValue(bool value)
{
    type = Type::BOOLEAN;
    b = value;
}

GeoJSONValue::GeoJSONValue(const std::map<std::string, GeoJSONValue>& value)
{
    type = Type::OBJECT;
    new (&o) std::map<std::string, GeoJSONValue> {value};
}

GeoJSONValue::GeoJSONValue(const std::vector<GeoJSONValue>& value)
{
    type = Type::ARRAY;
    new (&a) std::vector<GeoJSONValue> {};
    a.reserve(value.size());
    for (const auto& v : value) {
        a.push_back(v);
    }
}

void GeoJSONValue::cleanup()
{
    using std::string;
    using object = std::map<std::string, GeoJSONValue>;
    using array = std::vector<GeoJSONValue>;
    if (type == Type::STRING) {
        s.~string();
    }
    else if (type == Type::OBJECT) {
        o.~object();
    }
    else if (type == Type::ARRAY) {
        a.~array();
    }
}

GeoJSONValue::~GeoJSONValue()
{
    cleanup();
}

GeoJSONValue::GeoJSONValue(const GeoJSONValue& v)
{
    switch (v.type) {
    case Type::NUMBER:
        d = v.d;
        break;
    case Type::BOOLEAN:
        b = v.b;
        break;
    case Type::STRING:
        new (&s) std::string{v.s};
        break;
    case Type::NULLTYPE:
        n = v.n;
        break;
    case Type::OBJECT:
        new (&o) std::map<std::string, GeoJSONValue> {v.o};
        break;
    case Type::ARRAY:
        new (&a) std::vector<GeoJSONValue> {};
        a.reserve(v.a.size());
        for (const auto& i : v.a) {
            a.push_back(i);
        }
        break;
    }
    type = v.type;
}

GeoJSONValue& GeoJSONValue::operator=(const GeoJSONValue& v)
{
    if (type == Type::STRING && v.type == Type::STRING) {
        s = v.s;
        return *this;
    }
    else if (type == Type::OBJECT && v.type == Type::OBJECT) {
        o = v.o;
        return *this;
    }
    else if (type == Type::ARRAY && v.type == Type::ARRAY) {
        a = v.a;
        return *this;
    }

    cleanup();

    switch (v.type) {
    case Type::NUMBER:
        d = v.d;
        break;
    case Type::BOOLEAN:
        b = v.b;
        break;
    case Type::STRING:
        new (&s) std::string{v.s};
        break;
    case Type::NULLTYPE:
        n = v.n;
        break;
    case Type::OBJECT:
        new (&o) std::map<std::string, GeoJSONValue> {v.o};
        break;
    case Type::ARRAY:
        new (&a) std::vector<GeoJSONValue> {};
        a.reserve(v.a.size());
        for (const auto& i : v.a) {
            a.push_back(i);
        }
        break;
    }
    type = v.type;
    return *this;
}

double GeoJSONValue::getNumber() const
{
    if (type != Type::NUMBER) throw GeoJSONTypeError{};
    return d;

}

const std::string& GeoJSONValue::getString() const
{
    if (type != Type::STRING) throw GeoJSONTypeError{};
    return s;
}

std::nullptr_t GeoJSONValue::getNull() const
{
    if (type != Type::NULLTYPE) throw GeoJSONTypeError{};
    return n;
}

bool GeoJSONValue::getBoolean() const
{
    if (type != Type::BOOLEAN) throw GeoJSONTypeError{};
    return b;
}

const std::map<std::string, GeoJSONValue>& GeoJSONValue::getObject() const
{
    if (type != Type::OBJECT) throw GeoJSONTypeError{};
    return o;
}

const std::vector<GeoJSONValue>& GeoJSONValue::getArray() const
{
    if (type != Type::ARRAY) throw GeoJSONTypeError{};
    return a;
}

bool GeoJSONValue::isNumber() const
{
    return type == Type::NUMBER;
}

bool GeoJSONValue::isString() const
{
    return type == Type::STRING;
}

bool GeoJSONValue::isNull() const
{
    return type == Type::NULLTYPE;
}

bool GeoJSONValue::isBoolean() const
{
    return type == Type::BOOLEAN;
}

bool GeoJSONValue::isObject() const
{
    return type == Type::OBJECT;
}

bool GeoJSONValue::isArray() const
{
    return type == Type::ARRAY;
}

// GeoJSONFeature

GeoJSONFeature::GeoJSONFeature(std::unique_ptr<geom::Geometry> g,
                               const std::map<std::string, GeoJSONValue>& p) : geometry(std::move(g)), properties(p) {}

GeoJSONFeature::GeoJSONFeature(std::unique_ptr<geom::Geometry> g,
                               std::map<std::string, GeoJSONValue>&& p) : geometry(std::move(g)), properties(std::move(p)) {}

GeoJSONFeature::GeoJSONFeature(GeoJSONFeature const& other) : geometry(other.geometry->clone()),
    properties(other.properties) {}

GeoJSONFeature::GeoJSONFeature(GeoJSONFeature&& other) : geometry(std::move(other.geometry)),
    properties(std::move(other.properties)) {}

GeoJSONFeature& GeoJSONFeature::operator=(const GeoJSONFeature& other)
{
    if (this == &other) {
        return *this;
    }
    geometry = other.geometry->clone();
    properties = other.properties;
    return *this;
}

GeoJSONFeature& GeoJSONFeature::operator=(GeoJSONFeature&& other)
{
    geometry = std::move(other.geometry);
    properties = std::move(other.properties);
    return *this;
}

const geom::Geometry* GeoJSONFeature::getGeometry() const
{
    return geometry.get();
}

const std::map<std::string, GeoJSONValue>& GeoJSONFeature::getProperties() const
{
    return properties;
}

// GeoJSONFeatureCollection

GeoJSONFeatureCollection::GeoJSONFeatureCollection(const std::vector<GeoJSONFeature>& f) : features(f) {}

GeoJSONFeatureCollection::GeoJSONFeatureCollection(std::vector<GeoJSONFeature>&& f) : features(std::move(f)) {}

const std::vector<GeoJSONFeature>& GeoJSONFeatureCollection::getFeatures() const
{
    return features;
}

} // namespace geos.io
} // namespace geos