[jira] [Resolved] (BEAM-887) Make FileBasedSink.getWriterResultCoder abstract

["Daniel Halperin (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/BEAM-887?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Daniel Halperin resolved BEAM-887.
----------------------------------
    Resolution: Fixed

> Make FileBasedSink.getWriterResultCoder abstract
> ------------------------------------------------
>
>                 Key: BEAM-887
>                 URL: https://issues.apache.org/jira/browse/BEAM-887
>             Project: Beam
>          Issue Type: Improvement
>          Components: sdk-java-core
>    Affects Versions: Not applicable
>            Reporter: Daniel Halperin
>            Assignee: Kenneth Knowles
>              Labels: backward-incompatible
>             Fix For: 0.4.0-incubating
>
>
> FileBasedSink has this function:
> {code}
>      /**
>        * Returns a coder for the writer result type.
>        */
>     public Coder<WriteT> getWriterResultCoder() {
>       return null;
>     }
> {code}
> It returns {{null}} by default, but in practice if this happens then building the pipeline will crash with a {{NullPointerException}}. Now that we can make backward-incompatible changes, just make it abstract and force implementations to add this method. (All implementations already implement it already.)



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