Java 11 migrate c-d (remaining) (#1111)

* Moves converter pattern to Java 11

* Moves cqrs pattern to Java 11

* Moves dao pattern to Java 11

* Moves data-bus pattern to Java 11

* Moves data-locality pattern to Java 11

* Moves data-mapper pattern to Java 11

* Moves data-transfer-object pattern to Java 11

* Moves decorator pattern to Java 11

* Moves delegation pattern to Java 11

* Moves dependency-injection to Java 11

* Moves dirty-flag to Java 11

* Moves double-buffer to Java 11

* Moves double-checked-locking to Java 11

* Moves double-dispatch to Java 11

* Corrects with changes thats breaking test cases

converter/src/main/java/com/iluwatar/converter/App.java

@@ -49,8 +49,11 @@ public class App {
     User user = userConverter.convertFromDto(dtoUser);
     LOGGER.info("Entity converted from DTO:" + user);
 
-    var users = List.of(new User("Camile", "Tough", false, "124sad"),
-        new User("Marti", "Luther", true, "42309fd"), new User("Kate", "Smith", true, "if0243"));
+    var users = List.of(
+        new User("Camile", "Tough", false, "124sad"),
+        new User("Marti", "Luther", true, "42309fd"),
+        new User("Kate", "Smith", true, "if0243")
+    );
     LOGGER.info("Domain entities:");
     users.stream().map(User::toString).forEach(LOGGER::info);
 

converter/src/main/java/com/iluwatar/converter/User.java

@@ -73,7 +73,7 @@ public class User {
     if (o == null || getClass() != o.getClass()) {
       return false;
     }
-    User user = (User) o;
+    var user = (User) o;
     return isActive == user.isActive && Objects.equals(firstName, user.firstName) && Objects
         .equals(lastName, user.lastName) && Objects.equals(userId, user.userId);
   }

converter/src/main/java/com/iluwatar/converter/UserConverter.java

@@ -28,13 +28,16 @@ package com.iluwatar.converter;
  */
 public class UserConverter extends Converter<UserDto, User> {
 
-  /**
-   * Constructor.
-   */
   public UserConverter() {
-    super(userDto -> new User(userDto.getFirstName(), userDto.getLastName(), userDto.isActive(),
-            userDto.getEmail()),
-        user -> new UserDto(user.getFirstName(), user.getLastName(), user.isActive(),
-            user.getUserId()));
+    super(UserConverter::convertToEntity, UserConverter::convertToDto);
   }
+
+  private static UserDto convertToDto(User user) {
+    return new UserDto(user.getFirstName(), user.getLastName(), user.isActive(), user.getUserId());
+  }
+
+  private static User convertToEntity(UserDto dto) {
+    return new User(dto.getFirstName(), dto.getLastName(), dto.isActive(), dto.getEmail());
+  }
+
 }

converter/src/main/java/com/iluwatar/converter/UserDto.java

@@ -74,7 +74,7 @@ public class UserDto {
     if (o == null || getClass() != o.getClass()) {
       return false;
     }
-    UserDto userDto = (UserDto) o;
+    var userDto = (UserDto) o;
     return isActive == userDto.isActive && Objects.equals(firstName, userDto.firstName) && Objects
         .equals(lastName, userDto.lastName) && Objects.equals(email, userDto.email);
   }