Package javax.persistence

Class Persistence

java.lang.Object

javax.persistence.Persistence

public class Persistence
extends Object

Bootstrap class that provides access to an EntityManagerFactory.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	PERSISTENCE_PROVIDER	Deprecated.
protected static final Set<PersistenceProvider>	providers	Deprecated.
private static PersistenceUtil	util

Constructor Summary

Constructors

Constructor	Description
Persistence()

Method Summary

Modifier and Type	Method	Description
static EntityManagerFactory	createEntityManagerFactory(String persistenceUnitName)	Create and return an EntityManagerFactory for the named persistence unit.
static EntityManagerFactory	createEntityManagerFactory(String persistenceUnitName, Map properties)	Create and return an EntityManagerFactory for the named persistence unit using the given properties.
static PersistenceUtil	getPersistenceUtil()
private static List<PersistenceProvider>	getProviders()

Methods inherited from class java.lang.Object

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

Field Details

PERSISTENCE_PROVIDER

@Deprecated
public static final String PERSISTENCE_PROVIDER

Deprecated.

See Also:

• Constant Field Values

providers

@Deprecated
protected static final Set<PersistenceProvider> providers

Deprecated.

util

private static PersistenceUtil util

Constructor Details

Persistence

public Persistence()

Method Details

createEntityManagerFactory

public static EntityManagerFactory createEntityManagerFactory(String persistenceUnitName)

Create and return an EntityManagerFactory for the named persistence unit.

Parameters:

persistenceUnitName - The name of the persistence unit

Returns:

The factory that creates EntityManagers configured according to the specified persistence unit

createEntityManagerFactory

public static EntityManagerFactory createEntityManagerFactory(String persistenceUnitName,
 Map properties)

Create and return an EntityManagerFactory for the named persistence unit using the given properties.

Parameters:

persistenceUnitName - The name of the persistence unit

properties - Additional properties to use when creating the factory. The values of these properties override any values that may have been configured elsewhere

Returns:

The factory that creates EntityManagers configured according to the specified persistence unit

getProviders

private static List<PersistenceProvider> getProviders()

getPersistenceUtil

public static PersistenceUtil getPersistenceUtil()

Returns:

Returns a PersistenceUtil instance.