Jakarta Persistence (JPA) Class

jakarta.persistence.Persistence

java.lang.Object
  ∟jakarta.persistence.Persistence
Bootstrap class used to obtain an EntityManagerFactory in Java SE environments. It may also be used to cause schema generation to occur.

The Persistence class is available in a Jakarta 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 Jakarta EE and Java SE environments.

Since:
Jakarta Persistence (JPA) 1.0
The Database Connection using JPA article explains how to use Persistence.

Public Static Fields

PERSISTENCE_PROVIDER
This final String is deprecated and should be removed and is only here for TCK backward compatibility
Deprecated:
TODO: Either change TCK reference to PERSISTENCE_PROVIDER field to expect "jakarta.persistence.spi.PersistenceProvider" or remove PERSISTENCE_PROVIDER field and also update TCK signature tests.
Since:
Jakarta Persistence (JPA) 1.0

Public Constructors

Persistence()
Default constructor.
Deprecated:
This class is not intended to be extended nor instantiated, it is going to be marked final when this constructor becomes hidden.
Since:
Jakarta Persistence (JPA) 1.0

Public Static Methods

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.
Since:
Jakarta Persistence (JPA) 1.0
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. These properties may include properties to control schema generation. 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.
Since:
Jakarta Persistence (JPA) 1.0
EntityManagerFactory createEntityManagerFactory(PersistenceConfiguration configuration)
Create and return an EntityManagerFactory for the named persistence unit, using the given properties.
Parameters:
configuration - configuration of the persistence unit
Returns:
the factory that creates EntityManagers configured according to the specified persistence unit.
Since:
Jakarta Persistence (JPA) 3.2
void generateSchema(String persistenceUnitName, Map<?,?> map)
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
map - 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..
Since:
Jakarta Persistence (JPA) 2.1
PersistenceUtil getPersistenceUtil()
Return the PersistenceUtil instance
Returns:
PersistenceUtil instance.
Since:
Jakarta Persistence (JPA) 2.0

Additional JDK methods inherited from java.lang.Object

clone(), equals(Object), finalize(), getClass(), hashCode(), notify(), notifyAll(), toString(), wait(), wait(long), wait(long,int), wait0(long)