Factor out glob pattern code from FileContext and Filesystem
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Key: HADOOP-6787
URL: https://issues.apache.org/jira/browse/HADOOP-6787
Project: Hadoop Common
Issue Type: Improvement
Reporter: Luke Lu
The GlobFilter class (especially the error-prone setRegex method) is duplicated
in both FileContext and Filesystem. And I'd like to be able to reuse the most
of the setRegex code for glob pattern matching in metrics filter configurations.
We could at least factor out the hairy setRegex code and package them into a
GlobPattern class with a minimum compile method.
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