javax.persistence: public class: Persistence

javax.persistence
public class: Persistence [javadoc | source]

java.lang.Object
   javax.persistence.Persistence

Bootstrap class that provides access to an EntityManagerFactory.

Field Summary
public static final String	PERSISTENCE_PROVIDER
protected static final Set<PersistenceProvider>	providers

Method from javax.persistence.Persistence Summary:
createEntityManagerFactory, createEntityManagerFactory

Methods from java.lang.Object:
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from javax.persistence.Persistence Detail:
public static EntityManagerFactory createEntityManagerFactory(String persistenceUnitName) { return createEntityManagerFactory( persistenceUnitName, null ); } Create and return an EntityManagerFactory for the named persistence unit.
public static EntityManagerFactory createEntityManagerFactory(String persistenceUnitName, Map properties) { EntityManagerFactory emf = null; if ( providers.size() == 0 ) { findAllProviders(); } for ( PersistenceProvider provider : providers ) { emf = provider.createEntityManagerFactory( persistenceUnitName, properties ); if ( emf != null ) break; } if ( emf == null ) { throw new PersistenceException( "No Persistence provider for EntityManager named " + persistenceUnitName ); } return emf; } Create and return an EntityManagerFactory for the named persistence unit using the given properties.

Method from javax.persistence.Persistence Detail:

 public static EntityManagerFactory createEntityManagerFactory(String persistenceUnitName) {
		return createEntityManagerFactory( persistenceUnitName, null );
}

Create and return an EntityManagerFactory for the named persistence unit.

 public static EntityManagerFactory createEntityManagerFactory(String persistenceUnitName,
    Map properties) {
		EntityManagerFactory emf = null;
		if ( providers.size() == 0 ) {
			findAllProviders();
		}
		for ( PersistenceProvider provider : providers ) {
			emf = provider.createEntityManagerFactory( persistenceUnitName, properties );
			if ( emf != null ) break;
		}
		if ( emf == null ) {
			throw new PersistenceException( "No Persistence provider for EntityManager named " + persistenceUnitName );
		}
		return emf;
}

Create and return an EntityManagerFactory for the named persistence unit using the given properties.