Abstract
Sometimes a Collection is used like a milk crate: it’s just a simple container with no apparent order or intended organization. Other cases demand some kind of system of order and arranging so the way objects are retrieved from the collection has meaning. Whether the collection is of the first type or the second, collections of objects require more effort to map than single objects, although in compensation they offer greater flexibility.
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- 1.
Assuming that the collection was not returned from a second level shared cache.
- 2.
See the javadoc for java.util.Map for more details.
- 3.
The @MapKey annotation is still required, however; otherwise, the @MapKeyColumn defaults would apply.
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© 2013 Mike Keith
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Keith, M., Schincariol, M. (2013). Collection Mapping. In: Pro JPA 2. Apress, Berkeley, CA. https://doi.org/10.1007/978-1-4302-4927-6_5
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DOI: https://doi.org/10.1007/978-1-4302-4927-6_5
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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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