Often you don’t want to map all relationships in an entity model (a blog post about this topic in detail will follow). Let’s have a look at this class diagram: There is no mapping between ...
Inheritance in JPA
Relational databases have tables and columns and object-oriented programming languages have classes and fields but they also provide inheritance. A concept that is not known in relational ...
Should you use Enums with JPA?
With JPA it’s possible to map Java enums to columns in a database table using the Enumerated annotation: An enum can be mapped as an integer or a string but mapping of enums that contain state ...
