Hibernate OneToMany zliczanie pogrupowanych wyników

@Entity
@Data
public class Comment {
  private Long id;
  private String comment;

  @OneToMany
  private List<CommentReaction> commentReactions;

  //Jak ogarnac taka liste, czytaj dalej
  List<ReactionCount> reactionsCount;
}

@Entity
@Data
public class CommentReaction {
   private Long id;
   private User user;

   @Enumerated
   private Reaction reaction;
}

public enum Reaction {
  OK, BAD;
}

@Data
public class ReactionCount {
   private Reaction reaction;
   private int reactionCount;
}

public class Reaction {
 TypeEnum type;
 Comment comment;
}
public class Comment {
    @Formula("(SELECT COUNT(R.id) FROM Reaction R WHERE R.comment = id AND R.type = 'POSITIVE')")
    long positiveReactionCount;
}

@Query("SELECT new com.example.ReactionCount(cr.reaction, COUNT(cr)) " +
       "FROM CommentReaction cr WHERE cr.comment.id = :commentId " +
       "GROUP BY cr.reaction ORDER BY cr.reaction")
List<ReactionCount> countReactionsForComment(@Param("commentId") Long commentId);