Pro Jakarta Persistence in Jakarta EE 10: An In-Depth Guide to Persistence in Enterprise Java Development

© The Author(s), under exclusive license to APress Media, LLC, part of Springer Nature 2022

L. Jungmann et al.Pro Jakarta Persistence in Jakarta EE 10https://doi.org/10.1007/978-1-4842-7443-9_5

5. Collection Mapping

Lukas Jungmann¹  , Mike Keith², Merrick Schincariol³ and Massimo Nardone⁴

(1)

Prague, Czech Republic

(2)

Ottawa, ON, Canada

(3)

Almonte, ON, Canada

(4)

HELSINKI, Finland

 

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 ...