org.datanucleus.store.valuegenerator

Class UUIDObjectGenerator

java.lang.Object

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

org.datanucleus.store.valuegenerator.UUIDObjectGenerator

All Implemented Interfaces:

ValueGenerator<UUID>

public class UUIDObjectGenerator
extends AbstractGenerator<UUID>

Value generator for a UUID utilising the JDK UUID class (128-bit, 36 character). Results in UUIDs 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 and Description
UUIDObjectGenerator(StoreManager storeMgr, String name)

Method Summary

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

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

UUIDObjectGenerator

public UUIDObjectGenerator(StoreManager storeMgr,
                           String name)

Method Detail

getStorageClass

public static Class getStorageClass()

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

Returns:

Storage class (in this case UUID.class)

reserveBlock

protected ValueGenerationBlock reserveBlock(long size)

Description copied from class: AbstractGenerator

Method to reserve a block of "size" values.

Specified by:

reserveBlock in class AbstractGenerator<UUID>

Parameters:

size - Number of values to reserve

Returns:

The allocated block