package api.request.response;

 import java.util.List;

 public interface Compute {

     public void computeData(Request request, Response response);

     /** Right now useless, but may be handy in future */

     public final class Request {

         /** allow access just from friend code */

         Request() {

         }

     }

     /** Allows clients to provide the computed strings */

     public final class Response {

         private final List<String> result;

         /** Allow access only to friend code */

         Response(List<String> result) {

             this.result = result;

         }

         public void add(String s) {

             result.add(s);

         }

         public void addAll(List<String> all) {

             result.addAll(all);

         }

     }

 }