org.hibernate.id
Interface UUIDGenerationStrategy

All Superinterfaces:

Serializable

All Known Implementing Classes:

CustomVersionOneStrategy, StandardRandomStrategy

public interface UUIDGenerationStrategy
extends Serializable

A strategy for generating a variant 2 UUID value.

Author:

Steve Ebersole

Method Summary

UUID

generateUUID(SessionImplementor session) Generate the UUID.

int

getGeneratedVersion() 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.

Method Detail

getGeneratedVersion

int getGeneratedVersion()

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.

Returns:

The supported generation version

generateUUID

UUID generateUUID(SessionImplementor session)

Generate the UUID.

Parameters:

session - The session asking for the generation

Returns:

The generated UUID.