Why is Lombok @Builder not compatible with this constructor?

Question

I have this simple code:

@Data
@Builder
public class RegistrationInfo {

    private String mail;
    private String password;

    public RegistrationInfo(R         


        

Answer 1

Presumably, @Builder generates an all-args constructor iff there are no other constructors defined.

@Data
@Builder
@AllArgsConstructor(access = AccessLevel.PRIVATE)
class RegistrationInfo {

    private String mail;
    private String password;

    private RegistrationInfo(RegistrationInfo registrationInfo) {
        this(registrationInfo.mail, registrationInfo.password);
    }
}

Answer 2

You can either add an @AllArgsConstructor annotation, because

@Builder generates an all-args constructor iff there are no other constructors defined.

(Quotting @Andrew Tobilko)

Or set an attribute to @Builder : @Builder(toBuilder = true) This gives you the functionality of a copy constructor.

@Builder(toBuilder = true)
class Foo {
    // fields, etc
}

Foo foo = getReferenceToFooInstance();
Foo copy = foo.toBuilder().build();

Answer 3

When you provide your own constructor then Lombok doesn't create a c-tor with all args that @Builder is using. So you should just add annotation @AllArgsConstructor to your class:

@Data
@Builder
@AllArgsConstructor
public class RegistrationInfo {
    //...
}