org.hibernate.id.uuid
Class CustomVersionOneStrategy
java.lang.Object
org.hibernate.id.uuid.CustomVersionOneStrategy
- All Implemented Interfaces:
- 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.
- Author:
- Steve Ebersole
- See Also:
- Serialized Form
Method Summary |
static long |
generateLeastSignificantBits(long seed)
|
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. |
long |
getMostSignificantBits()
|
static void |
main(String[] args)
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
CustomVersionOneStrategy
public CustomVersionOneStrategy()
getGeneratedVersion
public int getGeneratedVersion()
- Description copied from interface:
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.
- Specified by:
getGeneratedVersion
in interface UUIDGenerationStrategy
- Returns:
- The supported generation version
generateUUID
public UUID generateUUID(SessionImplementor session)
- Description copied from interface:
UUIDGenerationStrategy
- Generate the UUID.
- Specified by:
generateUUID
in interface UUIDGenerationStrategy
- Parameters:
session
- The session asking for the generation
- Returns:
- The generated UUID.
getMostSignificantBits
public long getMostSignificantBits()
generateLeastSignificantBits
public static long generateLeastSignificantBits(long seed)
main
public static void main(String[] args)
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