The domain model

The following sections show how to implement CRUD views using two different designs: a Grid in editable mode, and modal windows. But first, we need to implement a domain model. We'll use JPA and repository classes, which we explained in the previous chapters. The domain model consists of simple classes to model a role-based schema: User, and Role. It also includes the corresponding UserRepository and RoleRepository classes.

Let's start with the simplest of the classes, Role. The following is the full implementation of this class:

@Entity
@Data
public class Role {

    @Id
    @GeneratedValue
    private Long id;

    private String name;

    private Boolean module1Authorized;

    private Boolean module2Authorized;

    @Override
    public String toString() {
        return name;
    }
}

Besides the usual JPA configuration stuff (such as the @Entity, @Id, and @GeneratedValue...