[jira] [Updated] (FLINK-5740) Make WrappingFunction an interface and move to flink-core

["Aljoscha Krettek (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-5740?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aljoscha Krettek updated FLINK-5740:
------------------------------------
    Priority: Blocker  (was: Major)

> Make WrappingFunction an interface and move to flink-core
> ---------------------------------------------------------
>
>                 Key: FLINK-5740
>                 URL: https://issues.apache.org/jira/browse/FLINK-5740
>             Project: Flink
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Aljoscha Krettek
>            Assignee: Aljoscha Krettek
>            Priority: Blocker
>
> Making it an interface and having an {{AbstractWrappingFunction}} will allow implementations to have different classes as base classes. Also, we should change {{FunctionUtils}} to work like {{StreamingFunctionUtils}} so that wrapping functions don't have to implement the methods of {{RichFunction}}.
> These tests are disabled for now because we cannot properly implement the required features:
>  - WindowFoldITCase.testFoldWithProcessWindowFunction() (Scala)
>  - WindowFunctionITCase.testRichProcessWindowFunction() (Scala)
>  - WindowReduceITCase.testReduceWithProcessWindowFunction (Scala)
> Because of the ignored tests I'm updating to "blocker".



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