Package com.helixframework.id.uuid

Class UuidUtil.V4

java.lang.Object

com.helixframework.id.uuid.UuidUtil.V4

Enclosing class:

UuidUtil

public static final class UuidUtil.V4
extends Object

A utility class for Version 4 UUID generation and manipulation. Provides methods for generating random and ordered UUIDs with version 4.

Constructor Summary

Constructors

Constructor	Description
V4()

Method Summary

Modifier and Type	Method	Description
static Instant	extractInstant(UUID u)	Extracts the timestamp from a Version 4 UUID.
static UUID	ordered()	Generates a monotonically ordered Version 4 UUID.
static UUID	random()	Generates a random Version 4 UUID.

Methods inherited from class java.lang.Object

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

Constructor Details

V4

public V4()

Method Details

random

public static UUID random()

Generates a random Version 4 UUID.

Returns:

new random Version 4 UUID

ordered

public static UUID ordered()

Generates a monotonically ordered Version 4 UUID. MSB encodes the current epoch millis (with version 4 set) without modification. LSB carries a 62-bit counter/random value with RFC 4122 variant, ensuring monotonicity within the same millisecond.

Returns:

new monotonically ordered Version 4 UUID

extractInstant

public static Instant extractInstant(UUID u)

Extracts the timestamp from a Version 4 UUID.

Parameters:

u - UUID to extract timestamp from

Returns:

Instant representing the timestamp, or null if not a V4 UUID