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https://issues.apache.org/jira/browse/FLINK-2723?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14903564#comment-14903564
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ASF GitHub Bot commented on FLINK-2723:
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Github user uce commented on the pull request:
https://github.com/apache/flink/pull/1169#issuecomment-142439086
Nice. And good explanation for the change. +1 to merge.
Optionally: While at it, it might be helpful to add two short Javadoc
comments to `copy` and `copyTo`.
> CopyableValue method to copy into new instance
> ----------------------------------------------
>
> Key: FLINK-2723
> URL: https://issues.apache.org/jira/browse/FLINK-2723
> Project: Flink
> Issue Type: New Feature
> Components: Core
> Affects Versions: master
> Reporter: Greg Hogan
> Assignee: Greg Hogan
> Priority: Minor
>
> Provide a method for generic user-defined functions to clone a
> {{CopyableValue}}. A common use case is a {{GroupReduceFunction}} that needs
> to store multiple objects. With object reuse we need to make a deep copy and
> with type erasure we cannot call new.
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