When it comes to using Hibernate, most projects only use the very basic features. This is mostly due to naivety or unfamiliarity with the product. Hibernate is a very mature and feature rich product that can be used to solve a lot of basic or advanced problems. I think the point here is to put the complexity at the right level: You can always take a very basic approach to using Hibernate and solve the mismatch between your mapping and your model in your model, but that would put complexity in your model that is basically boilerplate code. It is only there because the persistence layer is not used correctly. If you make the persistence layer (in this case the Hibernate mapping) more complex it will be harder to maintain, but your model code will be more concise and easier to understand.

One of the features of Hibernate that is hardly ever used, but has some very interesting applications is the ability to map java.util.Maps. This blog will show an application of using a Map in your model and mapping that model with Hibernate to a Relational Database Schema.

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