[FEATURE] Support Jakarta Nonnull/Nullable annotations

[jvwilge]

I ran into an issue with using Jakarta's @Nullable instead of javax (or checker).

I tried to add the config property :

lombok.addNullAnnotations = CUSTOM:jakarta.annotation.Nonnull:jakarta.annotation.Nullable

And it seems to partially work (e.g. for return values), but when using @Builder the @Nullable is not copied to the parameter of the generated method first() on the Builder.

import jakarta.annotation.Nullable;
import java.util.List;
import lombok.Builder;
import lombok.Value;

@Value
@Builder
public class JakartaExample {

    @Nullable
    List<String> first;

}

I'd expect

public JakartaExample.JakartaExampleBuilder first(@Nullable final List<String> first) {
      this.first = first;
      return this;
}

as a builder method, but currently the @Nullable is not copied (it does work for javax and checkerframework as expected)

Not sure if it's important, but if I use the javax or checker annotations the @Nullable is copied, even when lombok.addNullAnnotations has the custom value mentioned above. So it seems some annotations are copied by default, regardless of the value of lombok.addNullAnnotations

[Rawi01]

You mixed up two different thinks. lombok.addNullAnnotations set the annotations that get used for generated code. If you want to copy annotations that are not in the internal base list you have to use lombok.copyableAnnotations.

Apart from that, I agree that Jakarta annotations should be directly supported.

[jvwilge]

That config property will solve my issue, thanks for your swift reply! But it would be nice if this is an automatic one since many frameworks (spring-boot 3 for example) switched to Jakarta.

I don't want to be a smart*ss, but technically the builder code is generated code, the sample I posted was generated by delombok (and I added @Nullable myself).

I read something about the copyableAnnotations in an issue , but couldn't find it in https://projectlombok.org/features/configuration
Shouldn't this property be there?

So for other people running into this issue, add this to your config:

lombok.copyableAnnotations+=jakarta.annotation.Nonnull
lombok.copyableAnnotations+=jakarta.annotation.Nullable

[rzwitserloot]

Available on edge.