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Pro JPA 2: Mastering the Java™ Persistence API by Merrick Schincariol, Mike Keith

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Chapter 10. Advanced Object-Relational Mapping

Every application is different, and, while most have some elements of complexity in them, the difficult parts in one application will tend to be different than those in other types of applications. Chances are that whichever application you are working on at any given time will need to make use of at least one advanced feature of the API. This chapter will introduce and explain some of these more advanced ORM features.

Some of the features in this chapter are targeted at applications that need to reconcile the differences between an existing data model and an object model. For example, when the data in an entity table would be better decomposed in the object model as an entity and a dependent sub-object ...

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