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Posted to dev@avro.apache.org by "Doug Cutting (JIRA)" <ji...@apache.org> on 2010/05/13 23:46:47 UTC

[jira] Commented: (AVRO-540) make GenericArray reversible

    [ https://issues.apache.org/jira/browse/AVRO-540?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12867265#action_12867265 ] 

Doug Cutting commented on AVRO-540:
-----------------------------------

Nevermind.  It is overriding a method that has javadoc!  +1 as-is.

> make GenericArray reversible
> ----------------------------
>
>                 Key: AVRO-540
>                 URL: https://issues.apache.org/jira/browse/AVRO-540
>             Project: Avro
>          Issue Type: New Feature
>          Components: java
>    Affects Versions: 1.3.2
>            Reporter: Eric Evans
>            Assignee: Eric Evans
>            Priority: Minor
>         Attachments: 0001-AVRO-540.-reverse-method-for-generic-arrays.patch
>
>
> There are a number of RPC methods in Cassandra that return ordered results (ordered by pluggable comparators, avro's ordering won't work), and each has a means of specifying that the order be reversed. The way this is currently done is to use a List to process the results, Collections.reverse() to reorder if needed, and then copy them to a GenericArray to be returned. It would be nice to avoid this intermediary step.
> The patch that follows adds a reverse() method to GenericData.Array that simply reverses the order of the elements in the underlying Object[].

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