BongHoLee

public class Movie {
  public Money calculateMovieFee(Screening screening) {
    // 예외적인 케이스를 처리하기 위해 요금 계산 책임을 Movie가 수행
    if (discountPolicy == null)
      return fee;

    // 기존 방식대로 요금 계산 책임을 discountPolicy가 수행
    return fee.minus(discountPolicy.calculateDiscountAmount(screening));
  }
}

BongHoLee

class Something {
  Parent parent;

  public Something(Parent parent) {
    this.parent = parent;
  }

  public void doing() {
    parent.doing();
  }

BongHoLee

public class FixedFeeCondition implements FeeCondition {
  @Override
  public List<DateTimeInterval> findTimeINtervals(Call call) {
    return Arrays.asList(call.getInterval());
  }
}

BongHoLee

public class DurationFeeCondition implements FeeCondition {
  private Duration from;
  private Duration to;
  
  public DurationFeeCondition(Duration from, Duration to) {
    this.from = from;
    this.to = to;
  }
  
  @Override

BongHoLee

public class DayOfWeekFeeCondition implements FeeCondition {
  private List<DayOfWeek> dayOfWeeks = new ArrayList<>();
  
  public DayOfWeekFeeCondition(DayOfWeek ... dayOfWeeks) {
    this.dayOfWeeks = dayOfWeeks;
  }
  
  @Override
  public List<DateTimeInterval> findTimeInterval(Call call) {
    return call.getInterval().splitByDay()

BongHoLee

public class DayOfWeekFeeCondition implements FeeCondition {
  private List<DayOfWeek> dayOfWeeks = new ArrayList<>();
  
  public DayOfWeekFeeCondition(DayOfWeek ... dayOfWeeks) {
    this.dayOfWeeks = dayOfWeeks;
  }
}

BongHoLee

public class TimeOfDayFeeCondition implements FeeCondition {
  private LocalTime from;
  private LocalTime to;
  
  public TimeOfDayFeeCondition(LocalTime from, LocalTime to) {
    this.from = from;
    this.to = to;
  }
  
  @Override

BongHoLee

public class TimeOfDayFeeCondition implements FeeCondition {
  private LocalTime from;
  private LocalTime to;
  
  public TimeOfDayFeeCondition(LocalTime from, LocalTime to) {
    this.from = from;
    this.to = to;
  }
}

BongHoLee

public class BasicRatePolicy implements RatePolicy {
  private List<FeeRule> feeRules = new ArrayList<>();
  
  public BasicRatePolicy(FeeRule ... feeRules) {
    this.feeRules = Arrays.asList(feeRules);
  }
  
  @Override
  public Money calculateFee(Phone phone) {
    return phone.getCalls()

BongHoLee

public class FeePerDuration {
  private Money fee;
  private Duration duration;
  
  public FeePerDuration(Money fee, Duration duration) {
    this.fee = fee;
    this.duration = duration;
  }
  
  public Money calculate(DateTimeInterval interval) {