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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7300) Configuration methods that return collections are inconsistent about mutability
Date Wed, 18 May 2011 21:42:47 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7300?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13035708#comment-13035708
] 

Hudson commented on HADOOP-7300:
--------------------------------

Integrated in Hadoop-Common-22-branch #51 (See [https://builds.apache.org/hudson/job/Hadoop-Common-22-branch/51/])
    HADOOP-7300. Configuration methods that return collections are inconsistent about mutability.
Contributed by Todd Lipcon.

todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1124370
Files : 
* /hadoop/common/branches/branch-0.22/src/java/org/apache/hadoop/util/StringUtils.java
* /hadoop/common/branches/branch-0.22/CHANGES.txt
* /hadoop/common/branches/branch-0.22/src/test/core/org/apache/hadoop/conf/TestConfiguration.java
* /hadoop/common/branches/branch-0.22/src/java/org/apache/hadoop/conf/Configuration.java


> Configuration methods that return collections are inconsistent about mutability
> -------------------------------------------------------------------------------
>
>                 Key: HADOOP-7300
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7300
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: conf
>    Affects Versions: 0.22.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>             Fix For: 0.22.0
>
>         Attachments: hadoop-7300.txt
>
>
> In particular, getTrimmedStringCollection seems to return an immutable collection, whereas
getStringCollection returns a mutable one.
> IMO we should always return mutable collections since these methods by definition are
doing copies.

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