Optional in Lombok

Question

I have a class called Address which looks like this:

@Value class Address {     @NotNull String userId;    @NotNull String line1;    String line2;     private Address(Builder b) {       // copy everything from builder    }     // override getter for line2 so that it returns Optional<String>    public Optional<String> getLine2() {       return Optional.ofNullable(this.line2);    }     // and a Builder    public static class Builder {      // builder methods    } } 

Here I am forced to write Builder and a Getter because, if I want to return an Optional while using Lombok, I will have to declare line2 as Optional<String>. And that will generate a builder method which accepts Optional<String>!

Is there any other way to use lombok with Optional?

Answer 1

The answer is no, and it probably never will.

You're probably doing it wrong :-) Optional is not a replacement for null nor a fancy way to prevent NullPointerException. It is to indicate that the question is unanswerable, like: what is the average age of an empty list of persons.

Optionals should never be passed on, but unboxed by the calling code as soon as possible.

See also https://www.voxxed.com/blog/2015/01/embracing-void-6-refined-tricks-dealing-nulls-java/

Since these scenarios are just a handful, and Lombok likes to enable programmers to write better code, I don't expect there will ever be support for it in Lombok.

Disclosure: I am a Lombok developer.