Abstract
The largest part of an API that persists objects to a relational database ends up being the object-relational mapping (ORM) component. The topic of ORM usually includes everything from how the object state is mapped to the database columns to how to issue queries across the objects. We are focusing this chapter primarily on how to define and map entity state to the database, emphasizing the simple manner in which it can be done.
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- 1.
Even though embedded types can be shared or reused, the instances cannot. An embedded object instance belongs to the entity that references it; no other entity instance, of that entity type or any other, can reference the same embedded instance.
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© 2013 Mike Keith
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Keith, M., Schincariol, M. (2013). Object-Relational Mapping. In: Pro JPA 2. Apress, Berkeley, CA. https://doi.org/10.1007/978-1-4302-4927-6_4
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DOI: https://doi.org/10.1007/978-1-4302-4927-6_4
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Publisher Name: Apress, Berkeley, CA
Print ISBN: 978-1-4302-4926-9
Online ISBN: 978-1-4302-4927-6
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