org.hibernate.id
Class UUIDGenerator

java.lang.Object
  org.hibernate.id.UUIDGenerator

All Implemented Interfaces:

Configurable, IdentifierGenerator

public class UUIDGenerator
extends Object
implements IdentifierGenerator, Configurable

An IdentifierGenerator which generates UUID values using a pluggable generation strategy. The values this generator can return include UUID, String and byte[16]

Supports 2 config parameters:

• UUID_GEN_STRATEGY - names the UUIDGenerationStrategy instance to use
• UUID_GEN_STRATEGY_CLASS - names the UUIDGenerationStrategy class to use

Currently there are 2 standard implementations of UUIDGenerationStrategy:

• StandardRandomStrategy (the default, if none specified)
• CustomVersionOneStrategy

Field Summary

static String	UUID_GEN_STRATEGY
static String	UUID_GEN_STRATEGY_CLASS

Fields inherited from interface org.hibernate.id.IdentifierGenerator

ENTITY_NAME, JPA_ENTITY_NAME

Constructor Summary

UUIDGenerator()

Method Summary

static UUIDGenerator	buildSessionFactoryUniqueIdentifierGenerator()
void	configure(Type type, Properties params, Dialect d) Configure this instance, given the value of parameters specified by the user as <param> elements.
Serializable	generate(SessionImplementor session, Object object) Generate a new identifier.

Methods inherited from class java.lang.Object

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

Field Detail

UUID_GEN_STRATEGY

public static final String UUID_GEN_STRATEGY

See Also:

Constant Field Values

UUID_GEN_STRATEGY_CLASS

public static final String UUID_GEN_STRATEGY_CLASS

See Also:

Constant Field Values

Constructor Detail

UUIDGenerator

public UUIDGenerator()

Method Detail

buildSessionFactoryUniqueIdentifierGenerator

public static UUIDGenerator buildSessionFactoryUniqueIdentifierGenerator()

configure

public void configure(Type type,
                      Properties params,
                      Dialect d)
               throws MappingException

Description copied from interface: Configurable

Configure this instance, given the value of parameters specified by the user as <param> elements. This method is called just once, following instantiation.

Specified by:

configure in interface Configurable

params - param values, keyed by parameter name

Throws:

MappingException

generate

public Serializable generate(SessionImplementor session,
                             Object object)
                      throws HibernateException

Description copied from interface: IdentifierGenerator

Generate a new identifier.

Specified by:

generate in interface IdentifierGenerator

object - the entity or toplevel collection for which the id is being generated

Returns:

a new identifier

Throws:

HibernateException