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  1. import java.time.Duration;
  2. import java.time.LocalDate;
  3. import java.time.LocalTime;
  4. import java.time.ZoneId;
  5. import java.time.ZonedDateTime;
  6. import java.util.Objects;
  7.  
  8. class Main {
  9.  
  10. 	public static void main(String[] args) {
  11. 		var startDate = LocalDate.of(2021, 10, 7);
  12. 		var endDate = LocalDate.of(2021, 10, 14); // Exactly a week
  13. 		var zone = ZoneId.of("Europe/Amsterdam");
  14.  
  15. 		var result = startDate.datesUntil(endDate)
  16. 			.map(date -> nonWeekendHours(date, zone))
  17. 			.reduce(Duration.ZERO, Duration::plus);
  18. 		System.out.println(result);
  19. 	}
  20.  
  21. 	private static Duration nonWeekendHours(LocalDate date, ZoneId zone) {
  22. 		LocalTimeRange result;
  23. 		switch (date.getDayOfWeek()) {
  24. 			case MONDAY:
  25. 			case TUESDAY:
  26. 			case WEDNESDAY:
  27. 			case THURSDAY:
  28. 				result = new LocalTimeRange(LocalTime.MIN, null);
  29. 				break;
  30. 			case FRIDAY:
  31. 				result = new LocalTimeRange(null, LocalTime.NOON);
  32. 				break;
  33. 			case SATURDAY:
  34. 			case SUNDAY:
  35. 				result = new LocalTimeRange(null, null);
  36. 				break;
  37. 			default:
  38. 				throw new IllegalArgumentException("This cannot happen, actually");
  39. 		};
  40. 		return result.toDuration(date, zone);
  41. 	}
  42. }
  43.  
  44. class LocalTimeRange {
  45.  
  46. 	public static final LocalTimeRange EMPTY = new LocalTimeRange(null, null);
  47.  
  48. 	private final LocalTime start;
  49. 	private final LocalTime endExclusive;
  50.  
  51. 	public LocalTimeRange(LocalTime start, LocalTime endExclusive) {
  52. 		this.start = start;
  53. 		this.endExclusive = endExclusive;
  54. 	}
  55.  
  56. 	public Duration toDuration(LocalDate date, ZoneId zone) {
  57. 		if (start == null && endExclusive == null) {
  58. 			return Duration.ZERO;
  59. 		}
  60.  
  61. 		var s = ZonedDateTime.of(date, Objects.requireNonNullElse(start, LocalTime.MIN), zone);
  62. 		ZonedDateTime e;
  63. 		if (endExclusive != null) {
  64. 			e = ZonedDateTime.of(date, endExclusive, zone);
  65. 		}
  66. 		else {
  67. 			e = ZonedDateTime.of(date.plusDays(1), LocalTime.MIN, zone);
  68. 		}
  69. 		return Duration.between(s, e);
  70. 	}
  71. }
  72.  
Success #stdin #stdout 0.14s 56204KB
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PT108H
https://ideone.com/rrGJ5X
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
public

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