State the role of SessionFactory interface plays in Hibernate? | Java Hibernate

•    An application obtains Session instances from a SessionFactory which is typically single for the whole application created during its initialization.
•    The SessionFactory caches generate SQL statements and other mapping metadata that Hibernate uses at runtime.
•    It also holds cached data that has been read in one unit of work and may be reused in a future unit of work
SessionFactory sessionFactory = configuration.buildSessionFactory();