ULID

STATUS: ACTIVE

This class implements the ULID spec in Apex. You can find that standard here: https://github.com/ulid/spec ULID === Universally Unique Lexicographically Sortable Identifier Think of them as a UUIDv4, but sortable. Similar to UUIDv7. These are, effectively a universally unique identifier but one that is sortable. This class is a port of the Javascript ULID reference implementation.

Fields

private CHARACTERSET → List<String>

This character set is the complete list of allowed characters in a ULID string. It intentionally does not include characters that may be ambiguously read, such as i, l, o, and u characters.

private CHARACTERSETSIZE → Long

private RANDOMLENGTH → Integer

private TIMELENGTH → Long

---

Methods

public static String generate()

Generates a ULID string according to spec. https://github.com/ulid/spec

Returns

Type	Description
String	String

private static String encodeTimestamp(Long dtSeed, Long timeLength)

Encodes a given timestamp into characters from the acceptable character set above.

Parameters

Param	Description
dtSeed	long form of Timestamp to encode
timeLength	how many characters of the timestamp to encode

Returns

Type	Description
String	String

private static String generateRandomString(Integer length)

generates a random string from the character set of a given length.

Parameters

Param	Description
length	Integer length of the string to generate

Returns

Type	Description
String	String

private static String fetchRandomCharacterFromCharacterSet()

pulls a random character from the character set.

Returns

Type	Description
String	String

---