5.1. Accessing Hibernate APIs from JPA

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JPA defines an incredibly useful method to allow applications access to the APIs of the underlying provider.

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<div class="title">Example 221. Accessing Hibernate APIs from JPA</div>
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<pre class="prettyprint highlight">`Session session = entityManager.unwrap( Session.class );
SessionImplementor sessionImplementor = entityManager.unwrap( SessionImplementor.class );

SessionFactory sessionFactory = entityManager.getEntityManagerFactory().unwrap( SessionFactory.class );`</pre>
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