Package javax.persistence

Class Persistence

java.lang.Object

javax.persistence.Persistence

public class Persistence
extends java.lang.Object

Bootstrap class that provides access to an EntityManagerFactory.

Field Summary

Fields

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

Constructor Summary

Constructors

Constructor	Description
Persistence()

Method Summary

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

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 java.lang.String PERSISTENCE_PROVIDER

Deprecated.

See Also:

Constant Field Values

providers

@Deprecated
protected static final java.util.Set<PersistenceProvider> providers

Deprecated.

util

private static PersistenceUtil util

Constructor Detail

Persistence

public Persistence()

Method Detail

createEntityManagerFactory

public static EntityManagerFactory createEntityManagerFactory(java.lang.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(java.lang.String persistenceUnitName,
                                                              java.util.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 java.util.List<PersistenceProvider> getProviders()

generateSchema

public static void generateSchema(java.lang.String persistenceUnitName,
                                  java.util.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.