javax.persistence

Class Persistence

java.lang.Object

javax.persistence.Persistence

public class Persistence
extends Object

Bootstrap class that is used to obtain an EntityManagerFactory in Java SE environments.

The Persistence class is available in a Java EE container environment as well; however, support for the Java SE bootstrapping APIs is not required in container environments.

The Persistence class is used to obtain a PersistenceUtil instance in both Java EE and Java SE environments.

Since:

Java Persistence 1.0

Field Summary

Fields

Modifier and Type	Field and Description
protected static Set<PersistenceProvider>	providers Deprecated.

Constructor Summary

Constructors

Constructor and Description
Persistence()

Method Summary

Methods

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<String,Object> properties) Create and return an EntityManagerFactory for the named persistence unit using the given properties.
static PersistenceUtil	getPersistenceUtil() Return the PersistenceUtil instance

Methods inherited from class java.lang.Object

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

Field Detail

providers

@Deprecated
protected static final Set<PersistenceProvider> providers

Deprecated.

This instance variable is deprecated and should be removed and is only here for TCK backward compatibility

Since:

Java Persistence 1.0

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<String,Object> 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.

getPersistenceUtil

public static PersistenceUtil getPersistenceUtil()

Return the PersistenceUtil instance

Returns:

PersistenceUtil instance

Since:

Java Persistence 2.0