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Posted to common-issues@hadoop.apache.org by "madhukara phatak (JIRA)" <ji...@apache.org> on 2012/07/03 11:15:11 UTC

[jira] [Updated] (HADOOP-8549) Allow other implementation's of java.util.Map in MapWritable

     [ https://issues.apache.org/jira/browse/HADOOP-8549?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

madhukara phatak updated HADOOP-8549:
-------------------------------------

    Attachment: HADOOP-8549.patch
    
> Allow other implementation's of java.util.Map in MapWritable
> ------------------------------------------------------------
>
>                 Key: HADOOP-8549
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8549
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: io
>    Affects Versions: 2.0.0-alpha
>            Reporter: madhukara phatak
>            Assignee: madhukara phatak
>            Priority: Minor
>         Attachments: HADOOP-8549.patch
>
>
> Current implementation of MapWritable uses HashMap as Map implementation. But in some of the use cases we need other implementations of Map like LinkedHashMap,SortedMap.This jira changes visibility of 'instance' in MapWritable from private to protected which allows us to inject custom Map implementation through sub classing MapWritable  .  

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