how can I keep all the nested objects with the same property names?
for example. Top level class is Policy.

@JsonFilter("myFilter")
public class Policy {
    String name;
    String number;
    List<Participant> participants;
    List<Asset> assets;
    Map<String, String> additionalFields;
}

@JsonFilter("myFilter")
public class Participant {
    String name;
    String number;
    List<Asset> assets;
    Map<String, String> additionalFields;
}

@JsonFilter("myFilter")
public class Asset {
    String name;
    String number;
    Map<String, String> additionalFields;
}

now, I want to exclude all fields except additionalFields on all the objects in response. I have the below implementation, but this removes everything and only keep additionalFields on Policy.

SimpleFilterProvider filterProvider = new SimpleFilterProvider() .addFilter("myFilter", SimpleBeanPropertyFilter.filterOutAllExcept("additionalFields"));