}

    public void test_parseDate() {
        Date date;

        date = FessFunctions.parseDate("");
        assertNull(date);

        date = FessFunctions.parseDate("2004-04-01T12:34:56.123Z");
        assertEquals("2004-04-01T12:34:56.123Z", FessFunctions.formatDate(date));

        date = FessFunctions.parseDate("2004-04-01T12:34:56Z");

        if (value == null) {
            return null;
        }
        return new Date(value);
    }

    public static Date parseDate(final String value) {
        return parseDate(value, Constants.DATE_OPTIONAL_TIME);
    }

    public static Date parseDate(final String value, final String format) {
        if (value == null) {
            return null;
        }

        try {

            final Date lastModified = FessFunctions.parseDate(lastModifiedObj.toString());
            if (lastModified != null) {
                return lastModified;
            }
        } else if ((lastModifiedObj instanceof final String[] lastModifieds) && (lastModifieds.length > 0)) {
            final Date lastModified = FessFunctions.parseDate(lastModifieds[0]);
            if (lastModified != null) {

        }
        if (clazz.isAssignableFrom(Date.class)) {
            if (value instanceof Date) {
                return (T) value;
            }
            return (T) FessFunctions.parseDate(value.toString());
        }
        if (clazz.isAssignableFrom(Long.class)) {
            if (value instanceof Long) {
                return (T) value;
            }

                        .filter(s -> !validateDateTimeString(source.get(s))).collect(Collectors.toList()));
    }

    default boolean validateDateTimeString(final Object obj) {
        if (FessFunctions.parseDate(obj.toString()) != null) {
            return true;
        }
        return false;
    }

    String getIndexAdminIntegerFields();

    default Set<String> getIndexAdminIntegerFieldSet() {

   *
   * @throws NumberFormatException if the string does not contain a valid unsigned {@code byte}
   *     value
   * @throws NullPointerException if {@code string} is null (in contrast to {@link
   *     Byte#parseByte(String)})
   * @since 13.0
   */
  @CanIgnoreReturnValue
  public static byte parseUnsignedByte(String string) {
    return parseUnsignedByte(string, 10);
  }

  /**

        } else if (o instanceof String) {
            return toPrimitiveByte((String) o);
        } else if (o instanceof java.util.Date) {
            if (pattern != null) {
                return Byte.parseByte(new SimpleDateFormat(pattern).format(o));
            }
            return (byte) ((java.util.Date) o).getTime();
        } else if (o instanceof Boolean) {
            return ((Boolean) o) ? (byte) 1 : (byte) 0;