Lombok @builder on a class that extends another class

Question

I have two classes Child extends Parent. I need to put @Builder annotation on the classes such that I do not need to create the builder my self.

Answer 1

Since release 1.18.2 lombok includes the new experimental @SuperBuilder. It supports fields from superclasses (also abstract ones). With it, the solution is as simple as this:

@SuperBuilder
public class Child extends Parent {
   private String a;
   private int b;
   private boolean c;
}

@SuperBuilder
public class Parent {
    private double d;
    private float e;
}

Child instance = Child.builder().b(7).e(6.3).build();

Update 2019-10-09: If you use IntelliJ, you need at least version 0.27 of the IntelliJ Lombok plugin to use @SuperBuilder.

PS: @AllArgsConstructor(onConstructor=@__(@Builder)) does not work because @Builder is an annotation-processing annotation that lombok translates to code during compilation. Generating and then translating new lombok annotation would require several iterations of annotation processing, and lombok does not support that. @Autowired, in contrast, is a regular Java annotation available at runtime.