@Override
public void resetIdentifier(
		Object entity,
		Serializable currentId,
		Object currentVersion,
		SharedSessionContractImplementor session) {
	//noinspection StatementWithEmptyBody
	if ( entityMetamodel.getIdentifierProperty().getIdentifierGenerator() instanceof Assigned ) {
	}
	else {
		//reset the id
		Serializable result = entityMetamodel.getIdentifierProperty()
				.getUnsavedValue()
				.getDefaultValue( currentId );
		setIdentifier( entity, result, session );
		//reset the version
		VersionProperty versionProperty = entityMetamodel.getVersionProperty();
		if ( entityMetamodel.isVersioned() ) {
			setPropertyValue(
					entity,
					entityMetamodel.getVersionPropertyIndex(),
					versionProperty.getUnsavedValue().getDefaultValue( currentVersion )
			);
		}
	}
}
 

/**
 * Constructs a new DefaultIdentifierGeneratorFactory.
 */
@SuppressWarnings("deprecation")
public DefaultIdentifierGeneratorFactory() {
	register( "uuid2", UUIDGenerator.class );
	register( "guid", GUIDGenerator.class );			// can be done with UUIDGenerator + strategy
	register( "uuid", UUIDHexGenerator.class );			// "deprecated" for new use
	register( "uuid.hex", UUIDHexGenerator.class ); 	// uuid.hex is deprecated
	register( "assigned", Assigned.class );
	register( "identity", IdentityGenerator.class );
	register( "select", SelectGenerator.class );
	register( "sequence", SequenceStyleGenerator.class );
	register( "seqhilo", SequenceHiLoGenerator.class );
	register( "increment", IncrementGenerator.class );
	register( "foreign", ForeignGenerator.class );
	register( "sequence-identity", SequenceIdentityGenerator.class );
	register( "enhanced-sequence", SequenceStyleGenerator.class );
	register( "enhanced-table", TableGenerator.class );
}
 

public void resetIdentifier(Object entity, Serializable currentId, Object currentVersion) {
	if ( entityMetamodel.getIdentifierProperty().getIdentifierGenerator() instanceof Assigned ) {
		//return currentId;
	}
	else {
		//reset the id
		Serializable result = entityMetamodel.getIdentifierProperty()
				.getUnsavedValue()
				.getDefaultValue( currentId );
		setIdentifier( entity, result );
		//reset the version
		VersionProperty versionProperty = entityMetamodel.getVersionProperty();
		if ( entityMetamodel.isVersioned() ) {
			setPropertyValue(
			        entity,
			        entityMetamodel.getVersionPropertyIndex(),
					versionProperty.getUnsavedValue().getDefaultValue( currentVersion )
				);
		}
		//return the id, so we can use it to reset the proxy id
		//return result;
	}
}