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https://issues.apache.org/jira/browse/KAFKA-8296?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias J. Sax resolved KAFKA-8296.
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Resolution: Duplicate
Closing this ticket as duplicate.
> Kafka Streams branch method raises type warnings
> ------------------------------------------------
>
> Key: KAFKA-8296
> URL: https://issues.apache.org/jira/browse/KAFKA-8296
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Reporter: Michael Drogalis
> Assignee: Ivan Ponomarev
> Priority: Minor
>
> Because the branch method in the DSL takes vargargs, using it as follows
> raises an unchecked type warning:
> {code:java}
> KStream<String, User>[] branches = builder.<String,
> User>stream(inputTopic)
> .branch((key, user) -> "united
> states".equals(user.getCountry()),
> (key, user) -> "germany".equals(user.getCountry()),
> (key, user) -> "mexico".equals(user.getCountry()),
> (key, user) -> true);
> {code}
> The compiler warns with:
> {code:java}
> Warning:(39, 24) java: unchecked generic array creation for varargs parameter
> of type org.apache.kafka.streams.kstream.Predicate<? super java.lang.String,?
> super io.confluent.developer.avro.User>[]
> {code}
> This is unfortunate because of the way Java's type system + generics work. We
> could possibly fix this by adding the @SafeVarargs annotation to the branch
> method signatures.
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