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https://issues.apache.org/jira/browse/HDFS-3481?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13401757#comment-13401757
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Eli Collins commented on HDFS-3481:
-----------------------------------

Yea, I don't think there's a workaround since java doesn't allow generic array 
creation. In this case we know the type statically so you could put the puts in 
a static method with @SuppressWarnings({"unchecked"}), but IMO that's harder to 
read so the current code in your patch is better.  +1 to the latest patch.
                
> Refactor HttpFS handling of JAX-RS query string parameters
> ----------------------------------------------------------
>
>                 Key: HDFS-3481
>                 URL: https://issues.apache.org/jira/browse/HDFS-3481
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 2.0.1-alpha
>            Reporter: Alejandro Abdelnur
>            Assignee: Alejandro Abdelnur
>             Fix For: 2.0.1-alpha
>
>         Attachments: HDFS-3481.patch, HDFS-3481.patch, HDFS-3481.patch
>
>
> Explicit parameters in the HttpFSServer became quite messy as they are the 
> union of all possible parameters for all operations.

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