Can lombok generate builder based on the type solely?

Question

I have a use case where I don't want to use the @Builder on the class itself , so I created method based builder like this:

  @Builder(builderMethodName = "carBuilder")
  public static Car build(int speed, String brand){
    Car car = new Car();
    car.setSpeed(speed);
    car.setBrand(brand);
    return car;
  }

But how can I handle when the given class has ton of fields (over ~20). Should I really specify them as parameters and invoke the setters by hand?
Couldn't just lombok generate them automatically based on the type?

Answer 1

Currently this is not possible because Lombok avoids inspecting types from elsewhere on the classpath when processing a file.

What's your reason for not adding @Builder to the class itself? If you can describe a common use case for that, you or someone else might be able to add this ability to Lombok. However, currently I can't see any good reasons for this. Most libraries should be relatively easy to use already and if its your own code, why not just add Lombok?

Also the main reason I add @Builder is because I want my classes to be immutable - given that the actual object is still mutable here, why use builder rather than the setters?