jclass FindClass()

in functions/testapp/src/android/android_main.cc [66:98]

• 25 lines of code
• 3 McCabe index (conditional complexity)

jclass FindClass(JNIEnv* env, jobject activity_object, const char* class_name) {
  jclass class_object = env->FindClass(class_name);
  if (env->ExceptionCheck()) {
    env->ExceptionClear();
    // If the class isn't found it's possible NativeActivity is being used by
    // the application which means the class path is set to only load system
    // classes.  The following falls back to loading the class using the
    // Activity before retrieving a reference to it.
    jclass activity_class = env->FindClass("android/app/Activity");
    jmethodID activity_get_class_loader = env->GetMethodID(
        activity_class, "getClassLoader", "()Ljava/lang/ClassLoader;");

    jobject class_loader_object =
        env->CallObjectMethod(activity_object, activity_get_class_loader);

    jclass class_loader_class = env->FindClass("java/lang/ClassLoader");
    jmethodID class_loader_load_class =
        env->GetMethodID(class_loader_class, "loadClass",
                         "(Ljava/lang/String;)Ljava/lang/Class;");
    jstring class_name_object = env->NewStringUTF(class_name);

    class_object = static_cast<jclass>(env->CallObjectMethod(
        class_loader_object, class_loader_load_class, class_name_object));

    if (env->ExceptionCheck()) {
      env->ExceptionClear();
      class_object = nullptr;
    }
    env->DeleteLocalRef(class_name_object);
    env->DeleteLocalRef(class_loader_object);
  }
  return class_object;
}