org.datanucleus.store.valuegenerator

Class UUIDStringGenerator

java.lang.Object

org.datanucleus.store.valuegenerator.AbstractGenerator

org.datanucleus.store.valuegenerator.AbstractUIDGenerator

org.datanucleus.store.valuegenerator.AbstractUUIDGenerator

org.datanucleus.store.valuegenerator.UUIDStringGenerator

All Implemented Interfaces:

ValueGenerator

public class UUIDStringGenerator
extends AbstractUUIDGenerator

Value generator for a UUID String format. Results in Strings of length 16 characters, containing the IP address of the local machine as per the JDO2 spec section 18.6.1.

Field Summary

Fields inherited from class org.datanucleus.store.valuegenerator.AbstractGenerator

allocationSize, block, initialValue, LOCALISER, name, properties, repositoryExists

Constructor Summary

Constructors

Constructor and Description
UUIDStringGenerator(String name, Properties props) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
protected String	getIdentifier() Create an identifier with the form "IIIIJJJJHHLLLLCC".

Methods inherited from class org.datanucleus.store.valuegenerator.AbstractUUIDGenerator

getCount

Methods inherited from class org.datanucleus.store.valuegenerator.AbstractUIDGenerator

getStorageClass, reserveBlock

Methods inherited from class org.datanucleus.store.valuegenerator.AbstractGenerator

allocate, createRepository, current, currentValue, getName, next, nextValue, obtainGenerationBlock, obtainGenerationBlock, repositoryExists, requiresRepository, reserveBlock

Methods inherited from class java.lang.Object

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

Constructor Detail

UUIDStringGenerator

public UUIDStringGenerator(String name,
                   Properties props)

Constructor.

Parameters:

name - Symbolic name for this generator

props - Properties controlling its behaviour

Method Detail

getIdentifier

protected String getIdentifier()

Create an identifier with the form "IIIIJJJJHHLLLLCC". Where IIII is the IP address, JJJJ is something unique across JVMs, HH is the High Time, LLLL is the low time, and CC is a count.

Specified by:

getIdentifier in class AbstractUIDGenerator

Returns:

The identifier