142 lines
4.1 KiB
C++
142 lines
4.1 KiB
C++
#pragma once
|
|
|
|
#include "value.hpp"
|
|
|
|
#include <mbgl/util/feature.hpp>
|
|
#include <mbgl/util/logging.hpp>
|
|
#include <mbgl/style/conversion/geojson.hpp>
|
|
#include <mbgl/style/conversion_impl.hpp>
|
|
|
|
#include <jni/jni.hpp>
|
|
#include <optional>
|
|
|
|
namespace mbgl {
|
|
namespace style {
|
|
namespace conversion {
|
|
|
|
template <>
|
|
class ConversionTraits<mbgl::android::Value> {
|
|
public:
|
|
static bool isUndefined(const mbgl::android::Value& value) { return value.isNull(); }
|
|
|
|
static bool isArray(const mbgl::android::Value& value) { return value.isArray(); }
|
|
|
|
static bool isObject(const mbgl::android::Value& value) { return value.isObject(); }
|
|
|
|
static std::size_t arrayLength(const mbgl::android::Value& value) {
|
|
return value.getLength();
|
|
;
|
|
}
|
|
|
|
static mbgl::android::Value arrayMember(const mbgl::android::Value& value, std::size_t i) { return value.get(i); }
|
|
|
|
static std::optional<mbgl::android::Value> objectMember(const mbgl::android::Value& value, const char* key) {
|
|
mbgl::android::Value member = value.get(key);
|
|
if (!member.isNull()) {
|
|
return member;
|
|
} else {
|
|
return {};
|
|
}
|
|
}
|
|
|
|
template <class Fn>
|
|
static std::optional<Error> eachMember(const mbgl::android::Value& value, Fn&& fn) {
|
|
assert(value.isObject());
|
|
mbgl::android::Value keys = value.keyArray();
|
|
std::size_t length = arrayLength(keys);
|
|
for (std::size_t i = 0; i < length; ++i) {
|
|
const auto k = keys.get(i).toString();
|
|
auto v = value.get(k.c_str());
|
|
std::optional<Error> result = fn(k, std::move(v));
|
|
if (result) {
|
|
return result;
|
|
}
|
|
}
|
|
return {};
|
|
}
|
|
|
|
static std::optional<bool> toBool(const mbgl::android::Value& value) {
|
|
if (value.isBool()) {
|
|
return value.toBool();
|
|
} else {
|
|
return {};
|
|
}
|
|
}
|
|
|
|
static std::optional<float> toNumber(const mbgl::android::Value& value) {
|
|
if (value.isNumber()) {
|
|
auto num = value.toFloat();
|
|
return num;
|
|
} else {
|
|
return {};
|
|
}
|
|
}
|
|
|
|
static std::optional<double> toDouble(const mbgl::android::Value& value) {
|
|
if (value.isNumber()) {
|
|
return value.toDouble();
|
|
} else {
|
|
return {};
|
|
}
|
|
}
|
|
|
|
static std::optional<std::string> toString(const mbgl::android::Value& value) {
|
|
if (value.isString()) {
|
|
return value.toString();
|
|
} else {
|
|
return {};
|
|
}
|
|
}
|
|
|
|
static std::optional<Value> toValue(const mbgl::android::Value& value) {
|
|
if (value.isNull()) {
|
|
return {};
|
|
} else if (value.isBool()) {
|
|
return {value.toBool()};
|
|
} else if (value.isString()) {
|
|
return {value.toString()};
|
|
} else if (value.isNumber()) {
|
|
return {value.toDouble()};
|
|
} else {
|
|
return {};
|
|
}
|
|
}
|
|
|
|
static std::optional<GeoJSON> toGeoJSON(const mbgl::android::Value& value, Error& error) {
|
|
if (value.isNull()) {
|
|
error = {"no json data found"};
|
|
return {};
|
|
}
|
|
|
|
if (value.isString()) {
|
|
return parseGeoJSON(value.toString(), error);
|
|
}
|
|
|
|
if (value.isObject()) {
|
|
mbgl::android::Value keys = value.keyArray();
|
|
std::size_t length = arrayLength(keys);
|
|
for (std::size_t i = 0; i < length; ++i) {
|
|
if (keys.get(i).toString() == "json") {
|
|
auto v = value.get("json");
|
|
if (v.isString()) {
|
|
return parseGeoJSON(v.toString(), error);
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
error = {"no json data found"};
|
|
return {};
|
|
}
|
|
};
|
|
|
|
template <class T, class... Args>
|
|
std::optional<T> convert(mbgl::android::Value&& value, Error& error, Args&&... args) {
|
|
return convert<T>(Convertible(std::move(value)), error, std::forward<Args>(args)...);
|
|
}
|
|
|
|
} // namespace conversion
|
|
} // namespace style
|
|
} // namespace mbgl
|