[jira] [Resolved] (BEAM-40) Replace rawtype lambda-incompatible uses of SerializableFunction with SimpleFunction (as appropriate)

["Kenneth Knowles (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/BEAM-40?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kenneth Knowles resolved BEAM-40.
---------------------------------
    Resolution: Not A Problem

> Replace rawtype lambda-incompatible uses of SerializableFunction with SimpleFunction (as appropriate)
> -----------------------------------------------------------------------------------------------------
>
>                 Key: BEAM-40
>                 URL: https://issues.apache.org/jira/browse/BEAM-40
>             Project: Beam
>          Issue Type: Task
>          Components: sdk-java-core
>            Reporter: Kenneth Knowles
>            Assignee: Kenneth Knowles
>            Priority: Minor
>              Labels: Java8, backward-incompatible
>             Fix For: First stable release
>
>
> When a lambda or method reference is used in Java 8 to provide a SerializableFunction<InputT, OutputT>, it is instantiated at the raw type SerializableFunction. We occasionally require reflective access to the actual parameter for OutputT, but it will be unavailable.
> MapElements and FlatMapElements thus use the analogous abstract class SimpleFunction in such situations to prevent use of a lambda or method reference. They then support lambda via separate constructors that require user help to determine the concrete output type.
> This ticket calls for an audit of such situations.



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