Package com.github.f4b6a3.uuid.creator

Class AbstractRandomBasedUuidCreator

java.lang.Object

com.github.f4b6a3.uuid.creator.AbstractUuidCreator

com.github.f4b6a3.uuid.creator.AbstractRandomBasedUuidCreator

All Implemented Interfaces:

NoArgumentsUuidCreator

Direct Known Subclasses:

AltCombGuidCreator, CombGuidCreator, RandomBasedUuidCreator

public abstract class AbstractRandomBasedUuidCreator
extends AbstractUuidCreator
implements NoArgumentsUuidCreator

Factory that creates random-based UUIDs.

Field Summary

Fields

Modifier and Type	Field	Description
protected Random	random

Fields inherited from class com.github.f4b6a3.uuid.creator.AbstractUuidCreator

version, versionBits

Constructor Summary

Constructors

Constructor	Description
AbstractRandomBasedUuidCreator()
AbstractRandomBasedUuidCreator(UuidVersion version)

Method Summary

Modifier and Type	Method	Description
UUID	create()	Returns a random-based UUID. ### RFC-4122 - 4.4.
<T extends AbstractRandomBasedUuidCreator> T	withFastRandomGenerator()	Replaces the default random generator with a faster one.
<T extends AbstractRandomBasedUuidCreator> T	withRandomGenerator(Random random)	Replaces the default random generator with another one.

Methods inherited from class com.github.f4b6a3.uuid.creator.AbstractUuidCreator

applyVariantBits, applyVersionBits, getVersion

Methods inherited from class java.lang.Object

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

Field Detail

random

protected Random random

Constructor Detail

AbstractRandomBasedUuidCreator

public AbstractRandomBasedUuidCreator()

AbstractRandomBasedUuidCreator

public AbstractRandomBasedUuidCreator(UuidVersion version)

Method Detail

create

public UUID create()

Returns a random-based UUID. ### RFC-4122 - 4.4. Algorithms for Creating a UUID from Truly Random or Pseudo-Random Numbers (1) Set the two most significant bits (bits 6 and 7) of the clock_seq_hi_and_reserved to zero and one, respectively. (2) Set the four most significant bits (bits 12 through 15) of the time_hi_and_version field to the 4-bit version number from Section 4.1.3. (3) Set all the other bits to randomly (or pseudo-randomly) chosen values.

Specified by:

create in interface NoArgumentsUuidCreator

Returns:

a random-based UUID

withRandomGenerator

public <T extends AbstractRandomBasedUuidCreator> T withRandomGenerator(Random random)

Replaces the default random generator with another one. The default random generator is SecureRandom. See Random.

Type Parameters:

T - the type parameter

Parameters:

random - a random generator

Returns:

AbstractRandomBasedUuidCreator

withFastRandomGenerator

public <T extends AbstractRandomBasedUuidCreator> T withFastRandomGenerator()

Replaces the default random generator with a faster one. The substitute random generator is Xorshift128PlusRandom. The host fingerprint is used to generate a salt for the random number generator. See: Xorshift128PlusRandom See: FingerprintUtil.getFingerprint()

Type Parameters:

T - the type parameter

Returns:

AbstractRandomBasedUuidCreator