Example usage for java.time LocalDateTime plusMonths

Introduction

In this page you can find the example usage for java.time LocalDateTime plusMonths.

Prototype

public LocalDateTime plusMonths(long months) 

Source Link

Document

Returns a copy of this LocalDateTime with the specified number of months added.

Usage

From source file:Main.java

public static void main(String[] args) {
    LocalDateTime a = LocalDateTime.of(2014, 6, 30, 12, 00);

    LocalDateTime t = a.plusMonths(100);

    System.out.println(t);//from www.  j av a  2s . c  o m
}

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From source file:de.steilerdev.myVerein.server.controller.admin.EventManagementController.java

/**
 * This function gathers all dates where an event takes place within a specific month and year. The function is invoked by GETting the URI /api/admin/event/month and specifying the month and year via the request parameters.
 * @param month The selected month.//w  w  w  .  ja  v a2  s .  c o  m
 * @param year The selected year.
 * @return An HTTP response with a status code. If the function succeeds, a list of dates, during the month, that contain an event, is returned, otherwise an error code is returned.
 */
@RequestMapping(value = "month", produces = "application/json", method = RequestMethod.GET)
public ResponseEntity<List<LocalDate>> getEventDatesOfMonth(@RequestParam String month,
        @RequestParam String year, @CurrentUser User currentUser) {
    logger.trace("[" + currentUser + "] Gathering events of month " + month + " and year " + year);
    ArrayList<LocalDate> dates = new ArrayList<>();
    int monthInt, yearInt;
    try {
        monthInt = Integer.parseInt(month);
        yearInt = Integer.parseInt(year);
    } catch (NumberFormatException e) {
        logger.warn("[" + currentUser + "] Unable to parse month or year.");
        return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
    }

    LocalDateTime start = LocalDate.of(yearInt, monthInt, 1).atStartOfDay();
    LocalDateTime end = start.plusMonths(1);

    logger.debug("Getting all single day events...");
    dates.addAll(eventRepository.findAllByEndDateTimeBetweenAndMultiDate(start, end, false).parallelStream()
            .map(Event::getStartDate).collect(Collectors.toList()));
    logger.debug("All single day events retrieved, got " + dates.size() + " dates so far");

    logger.debug("Getting all multi day events...");
    //Collecting all multi date events, that either start or end within the selected month (which means that events that are spanning over several months are not collected)
    Stream.concat(eventRepository.findAllByStartDateTimeBetweenAndMultiDate(start, end, true).stream(), //All multi date events starting within the month
            eventRepository.findAllByEndDateTimeBetweenAndMultiDate(start, end, true).stream()) //All multi date events ending within the month
            .distinct() //Removing all duplicated events
            .parallel().forEach(event -> { //Creating a local date for each occupied date of the event
                for (LocalDate date = event.getStartDate(); //Starting with the start date
                        !date.equals(event.getEndDateTime().toLocalDate()); //Until reaching the end date
                        date = date.plusDays(1)) //Adding a day within each iterations
                {
                    dates.add(date);
                }
                dates.add(event.getEndDateTime().toLocalDate()); //Finally adding the last date
            });
    logger.debug("All multi day events gathered, got " + dates.size() + " dates so far");

    if (dates.isEmpty()) {
        logger.warn("[" + currentUser + "] Returning empty dates list of " + month + "/" + year);
        return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
    } else {
        logger.debug("[" + currentUser + "] Returning dates list " + month + "/" + year);
        return new ResponseEntity<>(dates.stream().distinct().collect(Collectors.toList()), HttpStatus.OK); //Returning an optimized set of events
    }
}

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