EntityManagerFactoryBuilder (Java Persistence 2.2 API Reference)

```
public interface EntityManagerFactoryBuilder
```
This service interface offers JPA clients the ability to create instances of EntityManagerFactory for a given named persistence unit. A service instance will be created for each named persistence unit and can be filtered on by comparing the value of the osgi.unit.name property containing the persistence unit name. This service is used specifically when the caller wants to pass in factory-scoped properties as arguments. If no properties are being used in the creation of the EntityManagerFactory then the basic EntityManagerFactory service should be used.

Fields
Modifier and Type	Field and Description
`static java.lang.String`	`JPA_UNIT_NAME` The name of the persistence unit.
`static java.lang.String`	`JPA_UNIT_PROVIDER` The class name of the provider that registered the service and implements the JPA javax.persistence.PersistenceProvider interface.
`static java.lang.String`	`JPA_UNIT_VERSION` The version of the persistence unit bundle.

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`EntityManagerFactory`	`createEntityManagerFactory(java.util.Map props)` Return an EntityManagerFactory instance configured according to the properties defined in the corresponding persistence descriptor, as well as the properties passed into the method.

Interface EntityManagerFactoryBuilder