Github user pnowojski commented on a diff in the pull request:
https://github.com/apache/flink/pull/4587#discussion_r160395375
--- Diff:
flink-libraries/flink-cep/src/main/java/org/apache/flink/cep/nfa/NFA.java ---
@@ -150,16 +126,13 @@
*/
private boolean nfaChanged;
- public NFA(
- final TypeSerializer<T> eventSerializer,
+ public NFA(final TypeSerializer<T> eventSerializer,
final long windowTime,
final boolean handleTimeout) {
-
this.eventSerializer = eventSerializer;
--- End diff --
I checked the `NFA` code and currently in master it seems like it could
handle `null` on this parameter while after this change that's no longer the
case? But regardless as you said `checkNotNull` is a good thing anyway.
---
