org.datanucleus.store.valuegenerator

Class UUIDHexGenerator

java.lang.Object

org.datanucleus.store.valuegenerator.AbstractGenerator<String>

org.datanucleus.store.valuegenerator.AbstractUUIDGenerator

org.datanucleus.store.valuegenerator.UUIDHexGenerator

All Implemented Interfaces:

ValueGenerator<String>

public class UUIDHexGenerator
extends AbstractUUIDGenerator

Value generator for a UUID hexadecimal format. Results in Strings of length 32 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, name, properties, repositoryExists

Fields inherited from interface org.datanucleus.store.valuegenerator.ValueGenerator

PROPERTY_CATALOG_NAME, PROPERTY_CLASS_NAME, PROPERTY_COLUMN_NAME, PROPERTY_FIELD_NAME, PROPERTY_KEY_CACHE_SIZE, PROPERTY_KEY_DATABASE_CACHE_SIZE, PROPERTY_KEY_INITIAL_VALUE, PROPERTY_KEY_MAX_VALUE, PROPERTY_KEY_MIN_VALUE, PROPERTY_ROOT_CLASS_NAME, PROPERTY_SCHEMA_NAME, PROPERTY_SEQUENCE_NAME, PROPERTY_SEQUENCETABLE_CATALOG, PROPERTY_SEQUENCETABLE_NAME_COLUMN, PROPERTY_SEQUENCETABLE_NEXTVAL_COLUMN, PROPERTY_SEQUENCETABLE_SCHEMA, PROPERTY_SEQUENCETABLE_TABLE, PROPERTY_TABLE_NAME

Constructor Summary

Constructors

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

Method Summary

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

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

getCount, 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

UUIDHexGenerator

public UUIDHexGenerator(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 "IIIIIIIIJJJJJJJJHHHHLLLLLLLLCCCC". Where IIIIIIII is the IP address, JJJJJJJJ is something unique across JVMs, HHHH is the High Time, LLLLLLLL is the low time, and CCCC is a count.

Specified by:

getIdentifier in class AbstractUUIDGenerator

Returns:

The identifier