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ASF GitHub Bot commented on FLINK-3318: --------------------------------------- Github user chermenin commented on a diff in the pull request: https://github.com/apache/flink/pull/2361#discussion_r97264252 --- Diff: flink-libraries/flink-cep/src/main/java/org/apache/flink/cep/nfa/State.java --- @@ -43,7 +43,14 @@ public State(final String name, final StateType stateType) { this.name = name; this.stateType = stateType; - stateTransitions = new ArrayList<StateTransition<T>>(); + stateTransitions = new ArrayList<>(); + } + + public State(String name, StateType stateType, Collection<StateTransition<T>> stateTransitions) { --- End diff -- It seems that this constructor is never used. What is that for? > Add support for quantifiers to CEP's pattern API > ------------------------------------------------ > > Key: FLINK-3318 > URL: https://issues.apache.org/jira/browse/FLINK-3318 > Project: Flink > Issue Type: Improvement > Components: CEP > Affects Versions: 1.0.0 > Reporter: Till Rohrmann > Assignee: Ivan Mushketyk > Priority: Minor > > It would be a good addition to extend the pattern API to support quantifiers > known from regular expressions (e.g. Kleene star, ?, +, or count bounds). > This would considerably enrich the set of supported patterns. > Implementing the count bounds could be done by unrolling the pattern state. > In order to support the Kleene star operator, the {{NFACompiler}} has to be > extended to insert epsilon-transition between a Kleene start state and the > succeeding pattern state. In order to support {{?}}, one could insert two > paths from the preceding state, one which accepts the event and another which > directly goes into the next pattern state. -- This message was sent by Atlassian JIRA (v6.3.4#6332)