OneToOne Double Bidirectional Association

Question

I am newbie to UML diagrams and would like to code the following one, where there is an OneToOne double bidirectional association, with JPA annotations.

Context: there are persons and teams. Each team is composed of persons and each person can only belong to one team. The teams have always a person acting as main Leader and optionally can have a second Leader.

Based on this page, I have written the code below but I am not sure if it is right.

@Entity
public class Person extends BaseEntity {

...

    @NotNull
    @OneToOne(mappedBy="mainLeader", cascade = CascadeType.ALL, orphanRemoval = true)
    private Team mainTeam;

    @NotNull
    @OneToOne(mappedBy="secondLeader", cascade = CascadeType.ALL, orphanRemoval = true)
    private Team secondTeam;    
}

@Entity
public class Team extends BaseEntity {

...

    @NotNull
    @OneToOne
    private Person mainLeader;

    @OneToOne
    private Person secondLeader;    
}

Answer 1

The association names suggests roles to be used. Main Leader might correspond to a role mainLeader. So I would just create a property in Team.

But since the associations are just named and do not have roles you are open to create roles at wish. This should be derived from the context.