startOfDay

TimetableConverter.java

private <W extends AbstractWorkingDay> List<WorkplaceAtTimeInterval> toTimeIntervals(List<W> workingDays, LocalDate date) {
        LocalDateTime branchStartDatetime = date.atTime(getTimetableDisplayStartTime());
        LocalDateTime branchEndDatetime = date.atTime(getTimetableDisplayEndTime());

        LocalDateTime from = getIsWorkdayEndsNextDay() ? branchStartDatetime.toLocalDate().atStartOfDay() : branchStartDatetime;
        LocalDateTime to = getIsWorkdayEndsNextDay() ? from.plusDays(1) : branchEndDatetime;

        List<WorkplaceAtTimeInterval> result = new ArrayList<>();

        while (from.isBefore(to)) {

            final LocalDateTime counterValue = LocalDateTime.from(from);
            List<W> workingDaysAtTime = workingDays.stream().filter(wd -> wd.isDatetimeWithin(counterValue)).collect(Collectors.toList());
            if (workingDaysAtTime.size() > 1) {
                throw new InvalidWorkingDayException(String.format("An error occured while trying to build week timetable;" +
                        "\nAmbiguous schedule for workplace %s at dateTime %s", workingDaysAtTime.get(0).getWorkplaceId(), from));
            }
            if (workingDaysAtTime.isEmpty()) {
                LocalDateTime nextWorkingDayStart = workingDays.stream()
                        .map(AbstractWorkingDay::getStartLocalDatetime)
                        .filter(localTime -> localTime.isAfter(counterValue))
                        .findFirst()
                        .orElse(to);
                result.addAll(createEmptyAndBreakTimeIntervals(from, nextWorkingDayStart));

                from = nextWorkingDayStart;
            } else {
                result.addAll(TimetableSlicer.sliceWorkingDayToWorkspaceInterval(from, to, workingDaysAtTime.get(0)));
                from = workingDaysAtTime.get(0).getEndLocalDatetime();
            }
        }

        return result;
    }