1 files changed, 42 insertions, 0 deletions
diff --git a/platform/android/src/conversion/collection.hpp b/platform/android/src/conversion/collection.hpp
new file mode 100644
index 0000000000..4256d5f969
--- /dev/null
+++ b/platform/android/src/conversion/collection.hpp
@@ -0,0 +1,42 @@
+#pragma once
+
+#include "conversion.hpp"
+#include "constant.hpp"
+
+#include <mbgl/util/optional.hpp>
+#include <jni/jni.hpp>
+
+#include <vector>
+
+namespace mbgl {
+namespace android {
+namespace conversion {
+
+/**
+ * Convert jarray -> ArrayList
+ */
+template <class T>
+inline jni::jobject* toArrayList(JNIEnv& env, jni::jarray<T>& array) {
+    static jni::jclass* javaClass = jni::NewGlobalRef(env, &jni::FindClass(env, "java/util/Arrays")).release();
+    static jni::jmethodID* asList = &jni::GetStaticMethodID(env, *javaClass, "asList", "([Ljava/lang/Object;)Ljava/util/List;");
+    return reinterpret_cast<jni::jobject*>(jni::CallStaticMethod<jni::jobject*>(env, *javaClass, *asList, array));
+}
+
+// Java -> C++
+
+
+inline std::vector<std::string> toVector(JNIEnv& env, jni::jarray<jni::jobject>& array) {
+    std::vector<std::string> vector;
+    std::size_t len = jni::GetArrayLength(env, array);
+
+    for (std::size_t i = 0; i < len; i++) {
+        jni::jstring* jstr = reinterpret_cast<jni::jstring*>(jni::GetObjectArrayElement(env, array, i));
+        vector.push_back(*convert<std::string, jni::String>(env, jni::String(jstr)));
+    }
+
+    return vector;
+}
+
+}
+}
+}