* either the field is absent or cannot be parsed as a date.
   */
  fun getDate(name: String): Date? = get(name)?.toHttpDateOrNull()

  /**
   * Returns the last value corresponding to the specified field parsed as an HTTP date, or null if
   * either the field is absent or cannot be parsed as a date.
   */

        #; !NotInScope = map:{ $$ALL$$ = list:{ $$VersionNo$$ } }
    }
    ; Date = map:{
        # [Include]
        # Date columns may not be needed
        # to be set these condition-keys basically.
        ; NotEqual = map:{}
        ; InScope = map:{}
        ; NotInScope = map:{}

        # [Exclude]
        # Common columns of Date type may not be needed
        # to be set these condition-keys basically.

  <function>
    <description>
      Returns Date from a given value.
    </description>
    <name>date</name>
    <function-class>org.codelibs.fess.taglib.FessFunctions</function-class>
    <function-signature>java.util.Date date(java.lang.Long)</function-signature>
    <example>
      ${fe:date(doc.tstamp)}
    </example>
  </function>

  <function>
    <description>
      Returns Date from a given value.
    </description>

            final Date date = toDate(str, format);
            if (date != null) {
                return new Timestamp(date.getTime());
            }
        }
        final Date date = toDate(str, locale);
        if (date != null) {
            return new Timestamp(date.getTime());
        }
        final Timestamp timestamp = toSqlTimestampJdbcEscape(str);

            final SimpleDateFormat format = new SimpleDateFormat(pattern, locale);
            final Date date = toDate(str, format);
            if (date != null) {
                return new Time(date.getTime());
            }
        }
        final Date date = toDate(str, locale);
        if (date != null) {
            return new Time(date.getTime());
        }
        final Time time = toSqlTimeJdbcEscape(str);

  }

  /**
   * @param delta the offset from the current date to use. Negative values yield dates in the past;
   *     positive values yield dates in the future.
   */
  private fun formatDate(
    delta: Long,
    timeUnit: TimeUnit,
  ): String? = formatDate(Date(System.currentTimeMillis() + timeUnit.toMillis(delta)))

  private fun formatDate(date: Date): String? {

    protected String toRangeDateString(Date date, String format) {
        if (format.contains("epoch_millis")) {
            return Long.toString(date.getTime());
        } else if (format.contains("date_optional_time")) {
            final SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");
            sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
            return sdf.format(date);
        } else {

  }

  @Test fun expiresDate() {
    assertThat(Date(parse(url, "a=b; Expires=Thu, 01 Jan 1970 00:00:00 GMT")!!.expiresAt))
      .isEqualTo(date("1970-01-01T00:00:00.000+0000"))
    assertThat(Date(parse(url, "a=b; Expires=Wed, 09 Jun 2021 10:18:14 GMT")!!.expiresAt))
      .isEqualTo(date("2021-06-09T10:18:14.000+0000"))
    assertThat(Date(parse(url, "a=b; Expires=Sun, 06 Nov 1994 08:49:37 GMT")!!.expiresAt))

    }

    /**
     * Calculates the document expiration date based on crawling configuration.
     * If the config has a timeToLive value, calculates expiration from current time.
     * Otherwise, returns the stored document expiration time.
     *
     * @param config the crawling configuration containing time-to-live settings
     * @return the document expiration date, or null if no expiration is set
     */

      .isEqualTo(date("1950-01-01T00:00:00.000+0000").time)
    assertThat(Adapters.parseUtcTime("500101010000Z"))
      .isEqualTo(date("1950-01-01T01:00:00.000+0000").time)

    assertThat(Adapters.parseUtcTime("491231225959Z"))
      .isEqualTo(date("2049-12-31T22:59:59.000+0000").time)
    assertThat(Adapters.parseUtcTime("491231235959Z"))
      .isEqualTo(date("2049-12-31T23:59:59.000+0000").time)
  }