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https://issues.apache.org/jira/browse/FLINK-2023?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14547764#comment-14547764
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Alexander Alexandrov commented on FLINK-2023:
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This was my basic idea, yes. In the example you have given things could be
probably simplified a bit, as type info related to the input are already
properly set. In the example above, you just need to pass the {{returnType}}.
> TypeExtractor does not work for (some) Scala Classes
> ----------------------------------------------------
>
> Key: FLINK-2023
> URL: https://issues.apache.org/jira/browse/FLINK-2023
> Project: Flink
> Issue Type: Bug
> Components: Type Serialization System
> Reporter: Aljoscha Krettek
>
> [~vanaepi] discovered some problems while working on the Scala Gelly API
> where, for example, a Scala MapFunction can not be correctly analyzed by the
> type extractor. For example, generic types will not be correctly detected.
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