Assembling via Plain Code

There are several ways to implement a configuration component responsible for assembling the application. If we are building an application without the support of a dependency injection framework, we can create such a component with plain code:

package copyeditor.configuration;

class Application {

  public static void main(String[] args) {

    

    AccountRepository accountRepository = new AccountRepository();

    ActivityRepository activityRepository = new ActivityRepository();

    AccountPersistenceAdapter accountPersistenceAdapter =

        new AccountPersistenceAdapter(accountRepository, activityRepository);

    SendMoneyUseCase sendMoneyUseCase =

        new SendMoneyUseService(

            accountPersistenceAdapter, ...