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

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

Daniel Halperin created BEAM-887:
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             Summary: 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
             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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