public static String getRecordReaderConfigClassName(String fileFormatStr) {
    return DEFAULT_RECORD_READER_CONFIG_CLASS_MAP.get(fileFormatStr.toUpperCase());
  }
@Test
  public void testGetRecordReaderConfigClassName() {
    assertEquals(getRecordReaderConfigClassName("avro"), DEFAULT_AVRO_RECORD_READER_CONFIG_CLASS);
    assertEquals(getRecordReaderConfigClassName("gzipped_avro"), DEFAULT_AVRO_RECORD_READER_CONFIG_CLASS);
    assertEquals(getRecordReaderConfigClassName("csv"), DEFAULT_CSV_RECORD_READER_CONFIG_CLASS);
    assertNull(getRecordReaderConfigClassName("json"));
    assertEquals(getRecordReaderConfigClassName("thrift"), DEFAULT_THRIFT_RECORD_READER_CONFIG_CLASS);
    assertNull(getRecordReaderConfigClassName("orc"));
    assertEquals(getRecordReaderConfigClassName("parquet"), DEFAULT_PARQUET_RECORD_READER_CONFIG_CLASS);
  }