Builder Providers

inject_builder

public class DelivererBuilder {
    private final MailServerFinder finder;
    private Newsletter newsletter;
    private String mailServerUrl;
    private int port;
    
    @Inject
    public DelivererBuilder(MailServerFinder finder) {
        this.finder = finder;
    }

     public Deliverer buildDeliverer() {
    MailServer server = finder.findMailServer(mailServerUrl, port); 
    return new Deliverer(letter, server);
     }
}