public static SelTypes fromStringToSelType(String clazz) {
    if (JAVA_CLAZZ_NAME_TO_SEL_TYPES.containsKey(clazz)) {
      return JAVA_CLAZZ_NAME_TO_SEL_TYPES.get(clazz);
    }
    throw new UnsupportedOperationException(
        "Please check the manual for supported "
            + "classes, which does not include class:  "
            + clazz);
  }
@Test(expected = UnsupportedOperationException.class)
  public void testFromStringToSelType() {
    assertEquals(SelTypes.LONG, SelTypeUtil.fromStringToSelType("int"));
    SelTypeUtil.fromStringToSelType("List");
  }