alma.acs.util

Class UTCUtility

java.lang.Object

alma.acs.util.UTCUtility

Direct Known Subclasses:

TimeHelper

public class UTCUtility
extends java.lang.Object

Converts UTC times of different epochs.

Note that Alma uses not only the Unix/Java time and OMG time that this class currently supports, but also "array time" which is a variant of VMS time: Nanoseconds since Nov 17, 1858. If we ever need to convert this to Java time, the formula is (jTime + 40587 * 86400000) * 1000000L with 40587 = number of days between 1858-11-17 and 1970-01-01 and 86400000 = milliseconds per day. See also ICD/HLA/ASDM :: ArrayTime.

Author:

hsommer Jul 8, 2003 2:50:08 PM

Constructor Summary

Constructors

Constructor and Description
UTCUtility()

Method Summary

Modifier and Type	Method and Description
static long	durationJavaMillisToOmg(long javaMillisDuration) Converts a time duration (not time stamp!) given in milliseconds to 100ns by multiplying it with 10000.
static java.lang.String	getUTCDate(long jTime) Converts the given java time ("short-epoch UTC", ms since Jan 01, 1970) to a stringified format: "yyyy-MM-ddTHH:mm:ss.SSS"
static long	utcJavaToOmg(long jTime) Converts from Java time ("short-epoch UTC", ms since Jan 01, 1970) to OMG time ("long-epoch UTC", 100-ns since Oct 15, 1582).
static long	utcOmgToJava(long omgTime) Converts from OMG time ("long-epoch UTC", 100-ns since Oct 15, 1582) to Java time ("short-epoch UTC", ms since Jan 01, 1970).

Methods inherited from class java.lang.Object

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

Constructor Detail

UTCUtility

public UTCUtility()

Method Detail

durationJavaMillisToOmg

public static long durationJavaMillisToOmg(long javaMillisDuration)

Converts a time duration (not time stamp!) given in milliseconds to 100ns by multiplying it with 10000.

Parameters:

javaMillisDuration -

Returns:

The duration in Corba-style 100-ns units.

utcOmgToJava

public static long utcOmgToJava(long omgTime)

Converts from OMG time ("long-epoch UTC", 100-ns since Oct 15, 1582) to Java time ("short-epoch UTC", ms since Jan 01, 1970).

Returns:

time in milliseconds since Jan 01, 1970 00:00:00

utcJavaToOmg

public static final long utcJavaToOmg(long jTime)

Converts from Java time ("short-epoch UTC", ms since Jan 01, 1970) to OMG time ("long-epoch UTC", 100-ns since Oct 15, 1582).

Returns:

time in 100-nanoseconds since Oct 15, 1582 00:00:00

getUTCDate

public static java.lang.String getUTCDate(long jTime)

Converts the given java time ("short-epoch UTC", ms since Jan 01, 1970) to a stringified format: "yyyy-MM-ddTHH:mm:ss.SSS"

Returns:

given date/time in UTC format

See Also:

IsoDateFormat.pattern