Example usage for java.time OffsetDateTime minusDays

Introduction

In this page you can find the example usage for java.time OffsetDateTime minusDays.

Prototype

public OffsetDateTime minusDays(long days) 

Source Link

Document

Returns a copy of this OffsetDateTime with the specified number of days subtracted.

Usage

From source file:org.silverpeas.core.calendar.CalendarEventOccurrence.java

/**
 * Gets optionally an event occurrence by its identifier.
 * <p>If the occurrence exists into the persistence, it is returned. Otherwise it is generated.
 * <p>Otherwise and if start date is valid, the occurrence is generated.
 * @param id the identifier of the aimed occurrence.
 * @return an optional calendar event occurrence.
 *///  w ww .  j av  a  2  s  .c  om
public static Optional<CalendarEventOccurrence> getById(final String id) {
    final CalendarEventOccurrenceRepository repository = CalendarEventOccurrenceRepository.get();
    final Mutable<CalendarEventOccurrence> occurrence = Mutable.ofNullable(repository.getById(id));
    if (!occurrence.isPresent()) {
        final Pair<String, Temporal> explodedId = explodeId(id);
        final String eventId = explodedId.getLeft();
        final Temporal startDate = explodedId.getRight();
        final Optional<CalendarEvent> event = Optional.ofNullable(CalendarEvent.getById(eventId));
        event.ifPresent(e -> {
            if (e.isRecurrent()) {
                final LocalDate occStartDate;
                final LocalDate occEndDate;
                if (startDate instanceof LocalDate) {
                    final LocalDate date = (LocalDate) startDate;
                    occStartDate = date.minusDays(1);
                    occEndDate = date.plusDays(1);
                } else {
                    final OffsetDateTime dateTime = (OffsetDateTime) startDate;
                    occStartDate = dateTime.minusDays(1).toLocalDate();
                    occEndDate = dateTime.plusDays(1).toLocalDate();
                }
                final List<CalendarEventOccurrence> occurrences = e.getCalendar()
                        .between(occStartDate, occEndDate).getEventOccurrences();
                occurrences.removeIf(o -> !o.getCalendarEvent().getId().equals(eventId)
                        || (!o.getStartDate().equals(startDate)));
                if (occurrences.size() == 1) {
                    occurrence.set(occurrences.get(0));
                }
            } else {
                occurrence.set(new CalendarEventOccurrence(e, e.getStartDate(), e.getEndDate()));
            }
        });
    }
    return Optional.ofNullable(occurrence.orElse(null));
}

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