97 lines
3.6 KiB
C++
97 lines
3.6 KiB
C++
#include "geometry.hpp"
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#include "point.hpp"
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#include "multi_point.hpp"
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#include "line_string.hpp"
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#include "multi_line_string.hpp"
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#include "polygon.hpp"
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#include "multi_polygon.hpp"
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#include "geometry_collection.hpp"
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#include <string>
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namespace mbgl {
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namespace android {
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namespace geojson {
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/**
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* Turn mapbox::geometry type into Java GeoJson Geometries
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*/
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class GeometryEvaluator {
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public:
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jni::JNIEnv& env;
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jni::Object<Geometry> operator()(const mbgl::Point<double> &geometry) const {
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return jni::Cast(env, Point::New(env, geometry), Geometry::javaClass);
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}
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jni::Object<Geometry> operator()(const mbgl::LineString<double> &geometry) const {
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return jni::Cast(env, LineString::New(env, geometry), Geometry::javaClass);
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}
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jni::Object<Geometry> operator()(const mbgl::MultiLineString<double> &geometry) const {
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return jni::Cast(env, MultiLineString::New(env, geometry), Geometry::javaClass);
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}
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jni::Object<Geometry> operator()(const mbgl::MultiPoint<double> &geometry) const {
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return jni::Cast(env, MultiPoint::New(env, geometry), Geometry::javaClass);
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}
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jni::Object<Geometry> operator()(const mbgl::Polygon<double> &geometry) const {
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return jni::Cast(env, Polygon::New(env, geometry), Geometry::javaClass);
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}
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jni::Object<Geometry> operator()(const mbgl::MultiPolygon<double> &geometry) const {
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return jni::Cast(env, MultiPolygon::New(env, geometry), Geometry::javaClass);
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}
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jni::Object<Geometry> operator()(const mapbox::geometry::geometry_collection<double> &geometry) const {
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return jni::Cast(env, GeometryCollection::New(env, geometry), Geometry::javaClass);
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}
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};
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jni::Object<Geometry> Geometry::New(jni::JNIEnv& env, mbgl::Geometry<double> geometry) {
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GeometryEvaluator evaluator { env } ;
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return mbgl::Geometry<double>::visit(geometry, evaluator);
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}
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mbgl::Geometry<double> Geometry::convert(jni::JNIEnv &env, jni::Object<Geometry> jGeometry) {
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auto type = Geometry::getType(env, jGeometry);
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if (type == Point::Type()) {
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return { Point::convert(env, jni::Object<Point>(jGeometry.Get())) };
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} else if (type == MultiPoint::Type()) {
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return { MultiPoint::convert(env, jni::Object<MultiPoint>(jGeometry.Get())) };
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} else if (type == LineString::Type()) {
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return { LineString::convert(env, jni::Object<LineString>(jGeometry.Get())) };
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} else if (type == MultiLineString::Type()) {
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return { MultiLineString::convert(env, jni::Object<MultiLineString>(jGeometry.Get())) };
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} else if (type == Polygon::Type()) {
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return { Polygon::convert(env, jni::Object<Polygon>(jGeometry.Get())) };
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} else if (type == MultiPolygon::Type()) {
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return { MultiPolygon::convert(env, jni::Object<MultiPolygon>(jGeometry.Get())) };
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} else if (type == GeometryCollection::Type()) {
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return { GeometryCollection::convert(env, jni::Object<GeometryCollection>(jGeometry.Get())) };
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}
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throw std::runtime_error(std::string {"Unsupported GeoJSON type: " } + type);
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}
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std::string Geometry::getType(jni::JNIEnv &env, jni::Object<Geometry> jGeometry) {
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static auto method = Geometry::javaClass.GetMethod<jni::String ()>(env, "type");
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auto jType = jGeometry.Call(env, method);
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auto type = jni::Make<std::string>(env, jType);
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jni::DeleteLocalRef(env, jType);
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return type;
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}
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void Geometry::registerNative(jni::JNIEnv &env) {
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// Lookup the class
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javaClass = *jni::Class<Geometry>::Find(env).NewGlobalRef(env).release();
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}
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jni::Class<Geometry> Geometry::javaClass;
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} // namespace geojson
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} // namespace android
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} // namespace mbgl
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