@Override
    public String toString() {
      StringBuilder s = new StringBuilder();
      s.append("PathFilter: ");
      for (String pString : pStrings) {
        s.append(pString + " ");
      }
      return s.toString();
    }
Create a generic Hive RecordReader than can iterate over all chunks in a
CombinedFileSplit.
ql/src/java/org/apache/hadoop/hive/ql/io/CombineHiveInputFormat.java