DBusHandlerResult a2dp_event_filter(DBusMessage *msg, JNIEnv *env) {
    DBusError err;

    if (!nat) {
        LOGV("... skipping %s\n", __FUNCTION__);
        LOGV("... ignored\n");
        return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
    }

    dbus_error_init(&err);

    if (dbus_message_get_type(msg) != DBUS_MESSAGE_TYPE_SIGNAL) {
        return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
    }

    DBusHandlerResult result = DBUS_HANDLER_RESULT_NOT_YET_HANDLED;

    if (dbus_message_is_signal(msg, "org.bluez.AudioSink",
                                      "PropertyChanged")) {
        jobjectArray str_array =
                    parse_property_change(env, msg, (Properties *)&sink_properties,
                                sizeof(sink_properties) / sizeof(Properties));
        const char *c_path = dbus_message_get_path(msg);
        jstring path = env->NewStringUTF(c_path);
        env->CallVoidMethod(nat->me,
                            method_onSinkPropertyChanged,
                            path,
                            str_array);
        env->DeleteLocalRef(path);
        result = DBUS_HANDLER_RESULT_HANDLED;
        return result;
    } else if (dbus_message_is_signal(msg, "org.bluez.Control",
                                      "GetPlayStatus")) {
        const char *c_path = dbus_message_get_path(msg);
        jstring path = env->NewStringUTF(c_path);

        env->CallVoidMethod(nat->me, method_onGetPlayStatusRequest, path);
        env->DeleteLocalRef(path);
        result = DBUS_HANDLER_RESULT_HANDLED;
        return result;
    }else {
        LOGV("... ignored");
    }
    if (env->ExceptionCheck()) {
        LOGE("VM Exception occurred while handling %s.%s (%s) in %s,"
             " leaving for VM",
             dbus_message_get_interface(msg), dbus_message_get_member(msg),
             dbus_message_get_path(msg), __FUNCTION__);
    }

    return result;
}
jobjectArray parse_remote_characteristic_property_change(JNIEnv *env, DBusMessage *msg) {
    return parse_property_change(env, msg, (Properties *) &characteristic_properties,
                    sizeof(characteristic_properties) / sizeof(Properties));
}