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 {
            return Long.toString(date.getTime());
        }
    }

            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 {
            return Long.toString(date.getTime());
        }
    }

        if (date == null) {
            return StringUtil.EMPTY;
        }
        final SimpleDateFormat sdf = new SimpleDateFormat(Constants.ISO_DATETIME_FORMAT);
        sdf.setTimeZone(Constants.TIMEZONE_UTC);
        return sdf.format(date);
    }

    /**
     * Formats a LocalDateTime object to ISO datetime string format.
     *
     * @param date the LocalDateTime to format

        }
        if (obj instanceof String) {
            final SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
            sdf.setTimeZone(TimeZone.getTimeZone("GMT"));
            try {
                return sdf.parse(obj.toString());
            } catch (final ParseException e) {
                if (logger.isDebugEnabled()) {

            Contributor target, Contributor source, boolean sourceDominant, Map<Object, Object> context) {
        String src = source.getTimezone();
        if (src != null) {
            if (sourceDominant || target.getTimezone() == null) {
                target.setTimezone(src);
                target.setLocation("timezone", source.getLocation("timezone"));
            }
        }
    }

     */
    @Test
    public void testLocalize() throws Exception {
        final Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("JST"));
        final Calendar local = CalendarConversionUtil.localize(calendar);
        assertEquals(TimeZone.getDefault(), local.getTimeZone());
    }

    /**
     * Test method for
     * {@link org.codelibs.core.convert.CalendarConversionUtil#localize(Calendar)}
     * .

class UpdateReleasedVersionsIntegrationTest extends Specification {

    def format = new SimpleDateFormat('yyyyMMddHHmmssZ')

    @TempDir
    File tmpDir

    def setup() {
        format.timeZone = TimeZone.getTimeZone("UTC")
    }

    def "updated released version file has expected format"() {
        given:
        def releasedVersionsFile = new File(tmpDir, "released-versions.json")
        releasedVersionsFile << '''{

            val string = formatUtcTime(value)
            return writer.writeUtf8(string)
          }
        },
    )

  internal fun parseUtcTime(string: String): Long {
    val utc = TimeZone.getTimeZone("GMT")
    val dateFormat =
      SimpleDateFormat("yyMMddHHmmss'Z'").apply {
        timeZone = utc
        set2DigitYearStart(Date(-631152000000L)) // 1950-01-01T00:00:00Z.
      }

    try {

            // otherwise we'll use the current timestamp by default and miss
            val formatter = SimpleDateFormat("yyyyMMddHHmmssZ").apply {
                timeZone = TimeZone.getTimeZone("UTC")
            }
            return formatter.format(Date(0L))
        }

        val buildTimestampFromReceipt = buildTimestampFromBuildReceipt.orNull
        if (buildTimestampFromReceipt != null) {

data class ReleasedVersion(val version: String, val buildTime: String) {
    fun gradleVersion() = GradleVersion.version(version)
    fun buildTimeStamp(): Date = SimpleDateFormat("yyyyMMddHHmmssZ").apply { timeZone = TimeZone.getTimeZone("UTC") }.parse(buildTime)