DIP Solution Part 1

D_DependencyInversionSolution.java

public class D_DependencyInversionSolution {
  
    @AllArgsConstructor
    private static class AuthenticateLogin {
        private final Authentication authentication;
      
        public boolean login(User user){
            return authentication.login(user);
        }
    }

    private interface Authentication {
        boolean login(User user);
    }

    private static class AuthenticationLinkedin implements Authentication {
        public boolean login(User user) {
            //autêntica o login com o Oauth Linkedin.
        }
    }
}