public static String getRecordReaderClassName(String fileFormatStr) {
    return DEFAULT_RECORD_READER_CLASS_MAP.get(fileFormatStr.toUpperCase());
  }
@Test
  public void testGetRecordReaderClassName() {
    assertEquals(getRecordReaderClassName("avro"), DEFAULT_AVRO_RECORD_READER_CLASS);
    assertEquals(getRecordReaderClassName("gzipped_avro"), DEFAULT_AVRO_RECORD_READER_CLASS);
    assertEquals(getRecordReaderClassName("csv"), DEFAULT_CSV_RECORD_READER_CLASS);
    assertEquals(getRecordReaderClassName("json"), DEFAULT_JSON_RECORD_READER_CLASS);
    assertEquals(getRecordReaderClassName("thrift"), DEFAULT_THRIFT_RECORD_READER_CLASS);
    assertEquals(getRecordReaderClassName("orc"), DEFAULT_ORC_RECORD_READER_CLASS);
    assertEquals(getRecordReaderClassName("parquet"), DEFAULT_PARQUET_RECORD_READER_CLASS);
  }