javalombokjava-annotations

How to suppress lombok warnings

I have an Entity 

@Builder
class MyEntity {
   private Set<OtherEntitiy> children = new HashSet<>()
}

And i get a lombok warning.

warning: @Builder will ignore the initializing expression entirely. If you want the initializing expression to serve as default, add @Builder.Default. If it is not supposed to be settable during building, make the field final. Set = new HashSet<>();

The question is: how can i suppress lombok's warning?

Also. I need to initialize children because i want to avoid NullPointerException. Also i can't mark this filed as final because it is not final really. I cant mark filed @Builder.Default because i wanna create this entity not only with builder and i wanna to save default value for other constructors.

Solution

  • Use @Builder.Defaultto add default behavior for your Builder

    @Builder
class MyEntity {
   @Builder.Default
   private Set<String> children = new HashSet<>();
}

    You use it on the field that has a default value defined an Lombok
    will then pick up the value during object creation

    @Builder.Default functionality was added in lombok v1.16.16. So if you're using lower version of Lombok you will not be able to use it.