[jira] [Created] (HDFS-4112) A few improvements on INodeDirectory

["Tsz Wo (Nicholas), SZE (JIRA)" <ji...@apache.org>]

Tsz Wo (Nicholas), SZE created HDFS-4112:
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             Summary: A few improvements on INodeDirectory
                 Key: HDFS-4112
                 URL: https://issues.apache.org/jira/browse/HDFS-4112
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: name-node
            Reporter: Tsz Wo (Nicholas), SZE
            Assignee: Tsz Wo (Nicholas), SZE
         Attachments: h4112_20121025.patch

Below are a few improvements on INodeDirectory
- Add a utility method for casting from INode;
- avoid creating new empty list and INode arrays;
- renames getChildren() and getChildrenRaw(), rewrite the javadoc.

Also,
- clean up isDirEmpty(..) and isEmpty() in FSDirectory

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