[android] geojson conversion optimisation

1 files changed, 66 insertions, 0 deletions

diff --git a/platform/android/src/gson/json_primitive.cpp b/platform/android/src/gson/json_primitive.cpp
new file mode 100644
index 0000000000..58d0b45fe7
--- /dev/null
+++ b/platform/android/src/gson/json_primitive.cpp
@@ -0,0 +1,66 @@
+#include "json_primitive.hpp"
+
+namespace mbgl {
+namespace android {
+namespace gson {
+
+JsonPrimitive::value JsonPrimitive::convert(jni::JNIEnv &env, jni::Object<JsonPrimitive> jsonPrimitive) {
+    value value;
+    if (jsonPrimitive) {
+        if (isBoolean(env, jsonPrimitive)) {
+            value = getAsBoolean(env, jsonPrimitive);
+        } else if (isNumber(env, jsonPrimitive)) {
+            //TODO: how to differentiate types here?
+            value = getAsDouble(env, jsonPrimitive);
+        } else if (isString(env, jsonPrimitive)) {
+            value = getAsString(env, jsonPrimitive);
+        } else {
+            value = mapbox::geometry::null_value;
+        }
+    }
+    return value;
+}
+
+bool JsonPrimitive::isBoolean(JNIEnv& env, jni::Object<JsonPrimitive> jsonPrimitive) {
+    static auto method = JsonPrimitive::javaClass.GetMethod<jni::jboolean ()>(env, "isBoolean");
+    return jsonPrimitive.Call(env, method);
+}
+
+bool JsonPrimitive::isString(JNIEnv& env, jni::Object<JsonPrimitive> jsonPrimitive) {
+    static auto method = JsonPrimitive::javaClass.GetMethod<jni::jboolean ()>(env, "isString");
+    return jsonPrimitive.Call(env, method);
+}
+
+bool JsonPrimitive::isNumber(JNIEnv& env, jni::Object<JsonPrimitive> jsonPrimitive) {
+    static auto method = JsonPrimitive::javaClass.GetMethod<jni::jboolean ()>(env, "isNumber");
+    return jsonPrimitive.Call(env, method);
+}
+
+bool JsonPrimitive::getAsBoolean(JNIEnv& env, jni::Object<JsonPrimitive> jsonPrimitive) {
+    static auto method = JsonPrimitive::javaClass.GetMethod<jni::jboolean ()>(env, "getAsBoolean");
+    return jsonPrimitive.Call(env, method);
+}
+
+std::string JsonPrimitive::getAsString(JNIEnv& env, jni::Object<JsonPrimitive> jsonPrimitive) {
+    static auto method = JsonPrimitive::javaClass.GetMethod<jni::String ()>(env, "getAsString");
+    auto jString = jsonPrimitive.Call(env, method);
+    auto string = jni::Make<std::string>(env, jString);
+    jni::DeleteLocalRef(env, jString);
+    return string;
+}
+
+double JsonPrimitive::getAsDouble(JNIEnv& env, jni::Object<JsonPrimitive> jsonPrimitive) {
+    static auto method = JsonPrimitive::javaClass.GetMethod<jni::jdouble ()>(env, "getAsDouble");
+    return jsonPrimitive.Call(env, method);
+}
+
+void JsonPrimitive::registerNative(jni::JNIEnv &env) {
+    // Lookup the class
+    javaClass = *jni::Class<JsonPrimitive>::Find(env).NewGlobalRef(env).release();
+}
+
+jni::Class<JsonPrimitive> JsonPrimitive::javaClass;
+
+} // namespace gson
+} // namespace android
+} // namespace mbgl
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