龙目岛是否支持非空验证？

Question

@NonNull only ensures not null, how to validate a collection that is not empty?

@AllArgsConstructor
public class Brand {
    @NonNull
    private String name;
    @NonNull
    // how to ensure not empty?
    private List<Product> products;
}

Answer 1

Lombok doesn't have that kind of annotation (see the full list of supported features).

You can use another library for that purpose. For example, Hibernate Validator supports annotations like @NotNull , @NotEmpty , @Size() among others.