package impl;

 import java.util.Collections;

 import java.util.List;

 import java.util.Map;

 public class Impl {

     public static void main(String[] args) {

         System.err.println("showUsageOfAbstractClassAPI:");

         showUsageOfAbstractClassAPI();

         System.err.println("showUsageOfRequestResponseAPI:");

         showUsageOfRequestResponseAPI();

     }

     private static void assertEquals(String msg, int expected, int real) {

         System.err.println("    " + msg + " expected: " + expected + " was: " + real);

         assert expected == real;

     }

     private static void showUsageOfAbstractClassAPI() {

         class ProviderWrittenAgainstVersion1 extends api.classes.Compute {

             @Override

             public List<String> getData() {

                 return Collections.singletonList("Hello");

             }

         }

         int index1 = api.classes.Support.searchByDescription("Hello", new ProviderWrittenAgainstVersion1());

         assertEquals("Hello was found", 0, index1);

         int index2 = api.classes.Support.searchByDescription("Unknown", new ProviderWrittenAgainstVersion1());

         assertEquals("Unknown was not found", -1, index2);

         class ProviderWrittenAgainstVersion2 extends api.classes.Compute {

             @Override

             public List<String> getData() {

                 return Collections.singletonList("Hello");

             }

             @Override

             public Map<String, String> getDataAndDescription() {

                 return Collections.singletonMap("Hello", "Says hello");

             }

         }

         int index3 = api.classes.Support.searchByDescription("Says hello", new ProviderWrittenAgainstVersion2());

         assertEquals("Found by description", 0, index3);

     }

     private static void showUsageOfRequestResponseAPI() {

         class ProviderWrittenAgainstVersion1 implements api.request.response.Compute {

             public void computeData(Request request, Response response) {

                 response.add("Hello");

             }

         }

         int index1 = api.request.response.Support.searchByDescription("Hello", new ProviderWrittenAgainstVersion1());

         assertEquals("Hello found", 0, index1);

         int index2 = api.request.response.Support.searchByDescription("Unknown", new ProviderWrittenAgainstVersion1());

         assertEquals("Unknown not found", -1, index2);

         class ProviderWrittenAgainstVersion2 implements api.request.response.Compute {

             public void computeData(Request request, Response response) {

                 response.add("Hello", "Says hello");

             }

         }

         int index3 = api.request.response.Support.searchByDescription("Says hello", new ProviderWrittenAgainstVersion2());

         assertEquals("Description found", 0, index3);

         assert index3 == 0;

     }

 }