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 and Description
static String	PERSISTENCE_PROVIDER Deprecated.
protected static Set<PersistenceProvider>	providers Deprecated.

Constructor Summary

Constructors

Constructor and Description
Persistence()

Method Summary

Modifier and Type	Method and 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 void	generateSchema(String persistenceUnitName, Map properties) Create database schemas and/or tables and/or create DDL scripts as determined by the supplied properties Called when schema generation is to occur as a separate phase from creation of the entity manager factory.
static PersistenceUtil	getPersistenceUtil()

Methods inherited from class java.lang.Object

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

Field Detail

PERSISTENCE_PROVIDER

@Deprecated
public static final String PERSISTENCE_PROVIDER

Deprecated.

See Also:

Constant Field Values

providers

@Deprecated
protected static final Set<PersistenceProvider> providers

Deprecated.

Constructor Detail

Persistence

public Persistence()

Method Detail

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

generateSchema

public static void generateSchema(String persistenceUnitName,
                                  Map properties)

Create database schemas and/or tables and/or create DDL scripts as determined by the supplied properties Called when schema generation is to occur as a separate phase from creation of the entity manager factory.

Parameters:

persistenceUnitName - the name of the persistence unit

properties - properties for schema generation; these may also contain provider-specific properties. The values of these properties override any values that may have been configured elsewhere.

Throws:

PersistenceException - if insufficient or inconsistent configuration information is provided or if schema generation otherwise fails.

getPersistenceUtil

public static PersistenceUtil getPersistenceUtil()

Returns:

Returns a PersistenceUtil instance.