Weaving in toString() implementation with AspectJ

Question

Trying to weave in a default toString() method for a large number of DTOs, using compile-time weaving only. The goal is to return a JSON representation using the Jackson lib

Answer 1

I tried your scenario and could replicate the behavior, I also tried combinations of @DeclareMixin instead of @DeclareParent and could not get that to work either. What worked for me though is to use native aspectj this way:

public aspect JsonToStringAspect {
    private interface JsonToString {}
    declare parents: com.mycompany.dto.* implements JsonToString;

    public String JsonToString.toString() {
        return "Overridden String through JsonToStringAspect";
    }
}

I am guessing that this may not be feasible using @AspectJ and may be possible only through native aspects.