Module org.datanucleus

Package org.datanucleus.store.valuegenerator

Class UUIDGenerator

java.lang.Object

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

org.datanucleus.store.valuegenerator.UUIDGenerator

All Implemented Interfaces:

ValueGenerator<String>

public class UUIDGenerator
extends AbstractGenerator<String>

Value generator for a String utilising the JDK UUID class (128-bit, 36 character). Results in Strings of length 36 characters, like "2cdb8cee-9134-453f-9d7a-14c0ae8184c6".

Field Summary

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

allocationSize, block, initialValue, name, storeMgr

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	Description
UUIDGenerator(StoreManager storeMgr, String name)	Constructor.

Method Summary

Modifier and Type	Method	Description
static Class	getStorageClass()	Accessor for the storage class for values generated with this generator.
protected ValueGenerationBlock<String>	reserveBlock(long size)	Method to reserve "size" values to the block.

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

allocate, current, currentValue, getName, next, nextValue, obtainGenerationBlock, obtainGenerationBlock, reserveBlock

Methods inherited from class java.lang.Object

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

Constructor Detail

UUIDGenerator

public UUIDGenerator(StoreManager storeMgr,
                     String name)

Constructor.

Parameters:

storeMgr - StoreManager

name - Symbolic name for this generator

Method Detail

getStorageClass

public static Class getStorageClass()

Accessor for the storage class for values generated with this generator.

Returns:

Storage class (in this case String.class)

reserveBlock

protected ValueGenerationBlock<String> reserveBlock(long size)

Method to reserve "size" values to the block.

Specified by:

reserveBlock in class AbstractGenerator<String>

Parameters:

size - The block size

Returns:

The reserved block