Module com.github.f4b6a3.uuid

Package com.github.f4b6a3.uuid.factory

Class AbstRandomBasedFactory

java.lang.Object

com.github.f4b6a3.uuid.factory.UuidFactory

com.github.f4b6a3.uuid.factory.AbstRandomBasedFactory

All Implemented Interfaces:

NoArgsFactory

Direct Known Subclasses:

PrefixCombFactory, RandomBasedFactory, ShortPrefixCombFactory, ShortSuffixCombFactory, SuffixCombFactory

public abstract class AbstRandomBasedFactory
extends UuidFactory
implements NoArgsFactory

Factory that creates random-based UUIDs.

Field Summary

Fields

Modifier and Type	Field	Description
protected RandomFunction	randomFunction
protected static int	UUID_BYTES

Fields inherited from class com.github.f4b6a3.uuid.factory.UuidFactory

version, versionMask

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstRandomBasedFactory(UuidVersion version, RandomFunction randomFunction)

Method Summary

Modifier and Type	Method	Description
UUID	create()	Returns a random-based UUID. ### RFC-4122 - 4.4.
protected static RandomFunction	getRandomFunction(Random random)	It instantiates a function that returns a byte array of a given length.

Methods inherited from class com.github.f4b6a3.uuid.factory.UuidFactory

getUuid, getUuid, getVersion

Methods inherited from class java.lang.Object

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

Field Detail

randomFunction

protected RandomFunction randomFunction

UUID_BYTES

protected static final int UUID_BYTES

See Also:

Constant Field Values

Constructor Detail

AbstRandomBasedFactory

protected AbstRandomBasedFactory(UuidVersion version,
                                 RandomFunction randomFunction)

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 NoArgsFactory

Returns:

a random-based UUID

getRandomFunction

protected static RandomFunction getRandomFunction(Random random)

It instantiates a function that returns a byte array of a given length. If the a null parameter is given, DefaultRandomFunction is implied.

Parameters:

random - a Random generator

Returns:

a random function that returns a byte array of a given length