Package javax.persistence
Class Persistence
java.lang.Object
javax.persistence.Persistence
Bootstrap class that is 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 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
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Field Summary
Modifier and TypeFieldDescriptionstatic final String
Deprecated.protected static final Set<PersistenceProvider>
Deprecated. -
Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionstatic 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 map) Create database schemas and/or tables and/or create DDL scripts as determined by the supplied properties.static PersistenceUtil
Return the PersistenceUtil instance
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Field Details
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PERSISTENCE_PROVIDER
Deprecated.This final String is deprecated and should be removed and is only here for TCK backward compatibility- Since:
- Java Persistence 1.0
- See Also:
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providers
Deprecated.This instance variable is deprecated and should be removed and is only here for TCK backward compatibility- Since:
- Java Persistence 1.0
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Constructor Details
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Persistence
public Persistence()
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Method Details
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createEntityManagerFactory
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
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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 unitproperties
- 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.
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generateSchema
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 unitmap
- properties for schema generation; these may also contain provider-specific properties. The value 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:
- Java Persistence 2.1
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getPersistenceUtil
Return the PersistenceUtil instance- Returns:
- PersistenceUtil instance
- Since:
- Java Persistence 2.0
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