程序包 org.hibernate.id.uuid

类 CustomVersionOneStrategy

java.lang.Object

org.hibernate.id.uuid.CustomVersionOneStrategy

所有已实现的接口:

Serializable, UUIDGenerationStrategy

public class CustomVersionOneStrategy
extends Object
implements UUIDGenerationStrategy

Applies a version 1 (time-based) generation strategy (using ip address rather than mac address) but applies them in a different layout. The strategy is very similar to the legacy UUIDHexGenerator id generator but uses a RFC 4122 compliant layout (variant 2).

NOTE : Can be a bottle neck due to the need to synchronize in order to increment an internal count as part of the algorithm.

作者:

Steve Ebersole

另请参阅:

序列化表格

构造器概要

构造器

构造器	说明
CustomVersionOneStrategy()

方法概要

修饰符和类型	方法	说明
static long	generateLeastSignificantBits(long seed)
UUID	generateUUID(SharedSessionContractImplementor session)	Generate the UUID.
int	getGeneratedVersion()	Which variant, according to IETF RFC 4122, of UUID does this strategy generate?
long	getMostSignificantBits()
static void	main(String[] args)

从类继承的方法 java.lang.Object

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

构造器详细资料

CustomVersionOneStrategy

public CustomVersionOneStrategy()

方法详细资料

getGeneratedVersion

public int getGeneratedVersion()

从接口复制的说明: UUIDGenerationStrategy

Which variant, according to IETF RFC 4122, of UUID does this strategy generate? RFC 4122 defines 5 variants (though it only describes algorithms to generate 4):

• 1 = time based
• 2 = DCE based using POSIX UIDs
• 3 = name based (md5 hash)
• 4 = random numbers based
• 5 = name based (sha-1 hash)

Returning the values above should be reserved to those generators creating variants compliant with the corresponding RFC definition; others can feel free to return other values as they see fit.

Informational only, and not used at this time.

指定者:

getGeneratedVersion 在接口中 UUIDGenerationStrategy

返回:

The supported generation version

generateUUID

public UUID generateUUID(SharedSessionContractImplementor session)

从接口复制的说明: UUIDGenerationStrategy

Generate the UUID.

指定者:

generateUUID 在接口中 UUIDGenerationStrategy

参数:

session - The session asking for the generation

返回:

The generated UUID.

getMostSignificantBits

public long getMostSignificantBits()

generateLeastSignificantBits

public static long generateLeastSignificantBits(long seed)

main

public static void main(String[] args)