Different constructors (LOMBOK)

Question

I have a class that looks like this:

@EqualsAndHashCode
@RequiredArgsConstructor
public class StatusUpdate {

    @Getter
    @Setter
    private Long id;
    
    @Getter
    @Setter
    @NonNull
    private String text;
    
    @Getter
    @Setter
    @NonNull
    private Date added; 
}

And I want to create these two constructors using Lombok:

public StatusUpdate(String text) {
     this.text = text;
}

public StatusUpdate(String text, Date added) {
     this.text = text;
     this.added = added;
}

I tried using all three annotations: @NoArgsConstructor @RequiredArgsConstructor @AllArgsConstructor

But I couldn't do that with these, I only have one constructor that has two parameters, so I need one more constructor with one parameter only. I read this topic: @SomeArgsConstructor and this is what I need but since this does not exists I guess I should create manually one arg constructor that I need and other constructors I'll handle with Lombok, or is there any better / more elegant way to do it using Lombok only?

Thanks!

Someone in the post you linked suggested to use the Lombok `@Builder`. Otherwise I doubt there is any preferred way to go about it. — Challe, Aug 20 '20 at 10:09

score 2 · Accepted Answer · answered Aug 21 '20 at 06:58

Yeah, you should just add them yourself. Years ago there was already a discussion to add the @SomeArgsConstructor annotation, but since the Lombok team never did add that annotation, I think it is unlikely they will ever do it.

Or, as stated in the comments, use the builder pattern with the @Builder annotation. Then you could write something like: StatusUpdate.builder().text("text").date(new Date()).build();.

Btw, if you do annotate all your fields with @Getter, @Setter and use the @EqualsAndHashCode and @RequiredArgsConstructor on class level, I think the @Data annotation could be a good fit for this class.

score 0 · Answer 2 · answered Nov 28 '20 at 17:52

use @Builder annotation with your entity class and build your object manually.

 User user = User.builder()
                    .username(signupDto.getUsername())
                    .email(signupDto.getEmail())
                    .password(encoder.encode(signupDto.getPassword()))
                    .roles(roles)
                    .build();

Different constructors (LOMBOK)

2 Answers2