Github user kl0u commented on a diff in the pull request:
https://github.com/apache/flink/pull/2361#discussion_r97789900
--- Diff:
flink-libraries/flink-cep/src/main/java/org/apache/flink/cep/nfa/compiler/NFACompiler.java
---
@@ -130,26 +114,166 @@
}
// add the beginning state
- final State<T> beginningState;
+ State<T> beginningState =
states.get(BEGINNING_STATE_NAME);;
+ addTransitions(beginningState, -1, patterns, states);
+ return new NFAFactoryImpl<T>(inputTypeSerializer,
windowTime, new HashSet<>(states.values()), timeoutHandling);
+ }
+ }
- if (states.containsKey(BEGINNING_STATE_NAME)) {
- beginningState =
states.get(BEGINNING_STATE_NAME);
- } else {
- beginningState = new
State<>(BEGINNING_STATE_NAME, State.StateType.Start);
- states.put(BEGINNING_STATE_NAME,
beginningState);
- }
+ private static <T> void addTransitions(State<T> currentState, int
patternPos, ArrayList<Pattern<T, ?>> patterns, Map<String, State<T>> states) {
--- End diff --
The `patterns` can become a `List` instead of `ArrayList`.
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