public static final String DATE_FORMAT_ISO_8601_BASIC = "yyyyMMdd'T'HHmmss.SSSZ";

    public static final String DATE_FORMAT_ISO_8601_EXTEND = "yyyy-MM-dd'T'HH:mm:ss.SSSZ";

    public static final String DATE_FORMAT_ISO_8601_EXTEND_UTC = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'";

    public static final String DATE_FORMAT_DIGIT_ONLY = "yyyyMMddHHmmss";

    protected CoreLibConstants() {
    }

    }

    /**
     * @throws Exception
     */
    @Test
    public void testToCalendar() throws Exception {
        final Date date = new Date();
        final Calendar cal = CalendarConversionUtil.toCalendar(date);
        assertEquals(date, cal.getTime());
    }

    /**
     *
     * @throws Exception
     */
    @Test
    public void testLocalize() throws Exception {

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

                        "start_date": {
                            "type": "string",
                            "format": "date-time",
                            "title": "Start Date",
                        },
                    },
                    "type": "object",
                    "required": ["username", "monthly_fee", "start_date"],
                    "title": "Subscription",
                },

                    + Hexdump.toHexString(this.createAction, 4) + ",creationTime=" + new Date(this.creationTime) + ",lastAccessTime="
                    + new Date(this.lastAccessTime) + ",lastWriteTime=" + new Date(this.lastWriteTime) + ",changeTime=" + new Date(this.changeTime)

	// ErrInvalidRetentionDate - indicates that retention date needs to be in ISO 8601 format
	ErrInvalidRetentionDate = errors.New("date must be provided in ISO 8601 format")
	// ErrPastObjectLockRetainDate - indicates that retention date must be in the future
	ErrPastObjectLockRetainDate = errors.New("the retain until date must be in the future")
	// ErrUnknownWORMModeDirective - indicates that the retention mode is invalid

      "url": {
        "type": "keyword"
      },
      "order": {
        "type": "integer"
      },
      "requestedAt": {
        "type": "date",
        "format": "date_optional_time"
      },
      "queryRequestedAt": {
        "type": "date",
        "format": "date_optional_time"
      }
    }

		canonicalHeaders += "\n"
	}

	date := expires // Date is set to expires date for presign operations.
	if date == "" {
		// If expires date is empty then request header Date is used.
		date = headers.Get(xhttp.Date)
	}

	// From the Amazon docs:
	//
	// StringToSign = HTTP-Verb + "\n" +
	// 	 Content-Md5 + "\n" +
	//	 Content-Type + "\n" +
	//	 Date/Expires + "\n" +
	//	 CanonicalizedProtocolHeaders +

  <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>

        assertEquals(777, DocumentUtil.getValue(doc, "key9", Integer.class));
    }

    public void test_date() {
        Map<String, Object> doc = new HashMap<>();

        Date expected4 = new Date();
        doc.put("key4", expected4);
        assertEquals(expected4, DocumentUtil.getValue(doc, "key4", Date.class));
    }

    public void test_long() {
        Map<String, Object> doc = new HashMap<>();