@Override
    public boolean accept(Path p) {
      String name = p.getName();
      return !name.startsWith("_") && !name.startsWith(".");
    }
File filter that removes all "hidden" files. This might be something worth removing from a more
general purpose utility; it accounts for the presence of metadata files created in the way
we're doing exports.
hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/HFileInputFormat.java