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https://issues.apache.org/jira/browse/BEAM-1982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16000627#comment-16000627
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Borisa Zivkovic commented on BEAM-1982:
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Do you want this to be done 1) only at the level of
org.apache.beam.runners.core.construction.SingleInputOutputOverrideFactory<InputT,
OutputT, TransformT> and its subclasses) or 2) we should introduce new
abstract class implementing
org.apache.beam.sdk.runners.PTransformOverrideFactory<InputT, OutputT,
TransformT> and adding this common code?
Two is more intrusive.
> Refactor PTransformOverrideFactories to remove code duplication
> ---------------------------------------------------------------
>
> Key: BEAM-1982
> URL: https://issues.apache.org/jira/browse/BEAM-1982
> Project: Beam
> Issue Type: Bug
> Components: runner-core
> Reporter: Thomas Groh
> Priority: Minor
> Labels: newbie, starter
>
> The majority of the factories take in a single PCollection as input and
> produce a single PCollection as output; the code to extract the single input
> can be invisible as part of the class hierarchy, rather than explicitly
> called in every override.
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