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    <blockquote> <p>Now, with the advent of JPA 2.0 and all the new features that come with it and that were initially missing in JPA 1.0 (<a href="http://en.wikibooks.org/wiki/Java_Persistence/What_is_new_in_JPA_2.0%3F" rel="nofollow noreferrer">http://en.wikibooks.org/wiki/Java_Persistence/What_is_new_in_JPA_2.0%3F</a>), I wonder if there is still a need to use Hibernate directly.</p> </blockquote> <p>Even for JPA 1.0, I would recommend a different approach: "JPA where you can, Hibernate where you must". </p> <blockquote> <p>What's your opinion? What's left in Hibernate 3.5 that I can't do with JPA 2.0 ?</p> </blockquote> <p>JPA 2.0 is very rich and I consider it as a huge improvement and many things that were requiring to use proprietary extensions are now standardized (see <a href="https://stackoverflow.com/questions/2435253/a-concise-clear-list-of-what-is-new-in-jpa2/2440516#2440516">this previous answer</a>). </p> <p>But you might still need some Hibernate specific extensions in some situations: a custom <code>UserType</code>, a non standard generator, a query by example, <code>@Formula</code>, <code>@Index</code>, etc. Have a look at the <a href="http://docs.jboss.org/hibernate/stable/annotations/reference/en/html_single/#entity-hibspec" rel="nofollow noreferrer">Section 2.4, “Hibernate Annotation Extensions”</a> for more "examples".</p> <p>But let me insist, I recommend to use JPA where you can, Hibernate where you must (the later part getting thiner with JPA 2.0).</p>
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    1. USPascal Thivent
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    1. COI thought that Hibernate is the implementation of JPA. And Hibernate can bring some extensions. So I really do not understand how can I use JPA **without** Hibernate or e.g. EclipseLink, OpenJPA?
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