uk.ac.starlink.hapi

Class Times

java.lang.Object

uk.ac.starlink.hapi.Times

public class Times
extends Object

Utilities for manipulating time values. Unix seconds are seconds elapsed since 1970-01-01T00:00:00. ISO-8601 refers to the restricted profile used by HAPI.

Since:

24 Jan 2024

Author:

Mark Taylor

Method Summary

Modifier and Type	Method and Description
static DateFormat	createDateFormat(String pattern) Creates a format for rendering dates.
static String	formatUnixSeconds(long unixSec, DateFormat format) Formats an epoch in Unix seconds using a supplied date format.
static String	formatUnixSeconds(long unixSec, String fmt) Formats an epoch in Unix seconds using a supplied date pattern.
static double	isoToUnixSeconds(String isoTime) Decodes an ISO-8601 string to Unix seconds.
static int	secToYear(long sec) Converts unix seconds to year since 0AD.
static long	yearToSec(int year) Converts year since 0AD to unix seconds.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

isoToUnixSeconds

public static double isoToUnixSeconds(String isoTime)

Decodes an ISO-8601 string to Unix seconds.

Parameters:

isoTime - epoch specified in ISO-8601

Returns:

epoch in Unix seconds, or NaN if isoTime can't be parsed

formatUnixSeconds

public static String formatUnixSeconds(long unixSec,
                                       DateFormat format)

Formats an epoch in Unix seconds using a supplied date format.

Parameters:

unixSec - time in unix seconds

format - time format

Returns:

formatted date

formatUnixSeconds

public static String formatUnixSeconds(long unixSec,
                                       String fmt)

Formats an epoch in Unix seconds using a supplied date pattern.

Parameters:

unixSec - time in unix seconds

fmt - time format

Returns:

formatted date

See Also:

SimpleDateFormat

createDateFormat

public static DateFormat createDateFormat(String pattern)

Creates a format for rendering dates.

Parameters:

pattern - format pattern

Returns:

format

See Also:

SimpleDateFormat

secToYear

public static int secToYear(long sec)

Converts unix seconds to year since 0AD.

Parameters:

sec - epoch in unix seconds

Returns:

year in which epoch occurs

yearToSec

public static long yearToSec(int year)

Converts year since 0AD to unix seconds.

Parameters:

year - year

Returns:

unix seconds