org.datanucleus.store.valuegenerator

Class AbstractUUIDGenerator

java.lang.Object

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

org.datanucleus.store.valuegenerator.AbstractUUIDGenerator

All Implemented Interfaces:

ValueGenerator<String>

Direct Known Subclasses:

UUIDHexGenerator, UUIDStringGenerator

public abstract class AbstractUUIDGenerator
extends AbstractGenerator<String>

Value generator for a UUID format. To be extended by implementations giving the UUID in particular forms.

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
AbstractUUIDGenerator(StoreManager storeMgr, String name) Constructor.

Method Summary

Modifier and Type	Method and Description
protected short	getCount() Simple counter for identities.
protected abstract String	getIdentifier() Create an identifier in the required UUID format required.
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

AbstractUUIDGenerator

public AbstractUUIDGenerator(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

getIdentifier

protected abstract String getIdentifier()

Create an identifier in the required UUID format required.

Returns:

The identifier

getCount

protected short getCount()

Simple counter for identities.

Returns:

The next count value