public List<BlockMetaData> getFilteredBlocks() {
    return filteredBlocks;
  }
gets a ParquetInputSplit corresponding to a split given by Hive

@param conf The JobConf of the Hive job
@return a ParquetInputSplit corresponding to the oldSplit
@throws IOException if the config cannot be enhanced or if the footer cannot be read from the file
ql/src/java/org/apache/hadoop/hive/ql/io/parquet/ParquetRecordReaderBase.java