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https://issues.apache.org/jira/browse/ZOOKEEPER-2194?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14554836#comment-14554836
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Chris Nauroth commented on ZOOKEEPER-2194:
------------------------------------------

Hello [~mitake].  This looks like a good idea.  I just have a minor nitpick.  
Would you please change this...

{code}
        if (children == null)
            return children;
{code}

...to this...

{code}
        if (children == null) {
            return children;
        }
{code}

In general, the existing code base uses braces even for a one-line block.

For the next revision of the patch, would you please generate it with {{git 
diff --no-prefix}}?  This is the format that the Jenkins pre-commit test job 
expects.

Thanks for the patch!

> Let DataNode.getChildren() return an unmodifiable view of its children set
> --------------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-2194
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2194
>             Project: ZooKeeper
>          Issue Type: Improvement
>            Reporter: Hitoshi Mitake
>            Priority: Trivial
>         Attachments: ZOOKEEPER-2194.patch
>
>
> Current DataNode.getChildren() directly returns a pointer of its private 
> member,  children. However, the member should be modified through addChild() 
> and removeChild(). Callers of getChildren() shouldn't modify it directly.
> For preventing the direct modification by the callers, this patch lets 
> getChildren() return an unmodifiable view of its children set. If the callers 
> try to modify directly, runtime exception will be risen.



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