Skipper.java

@Entity
public class Skipper
{
    @Identifier(generator = IdentifierGenerator.SEQUENCE)
    @Attribute
    protected long id;

    @Attribute
    protected String firstName;

    @Attribute
    protected String lastName;

    @Relationship(type = RelationshipType.ONE_TO_ONE, inverseClass = Sailboat.class, inverse = "skipper", cascadePolicy = CascadePolicy.NONE)
    protected Sailboat sailboat;
    
    // Getters and setters
}