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https://issues.apache.org/jira/browse/BEAM-469?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15423000#comment-15423000
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Luke Cwik commented on BEAM-469:
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That doesn't work with nesting. Imagine I have a KV coder with both the key and
value coder being nullable, the key nullable coder doesn't have enough
information to be able to make the decision that it isn't followed by another
coder.
> NullableCoder should encode using the context given and not always use the
> nested context
> -----------------------------------------------------------------------------------------
>
> Key: BEAM-469
> URL: https://issues.apache.org/jira/browse/BEAM-469
> Project: Beam
> Issue Type: Improvement
> Components: sdk-java-core
> Reporter: Luke Cwik
> Assignee: Luke Cwik
> Priority: Trivial
> Fix For: Not applicable
>
>
> NullableCoder should encode using the context given and not always use the
> nested context. For coders which can efficiently encode in the outer context
> such as StringUtf8Coder or ByteArrayCoder, we are forcing them to prefix
> themselves with their length.
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