net.fortuna.ical4j.model.property.Version Java Examples

/**
 * Makes dummy calendar.
 * @return The dummy calendar.
 */
public Calendar makeDummyCalendar() {
    Calendar cal =new Calendar();

    cal.getProperties().add(new ProdId(CosmoConstants.PRODUCT_ID));
    cal.getProperties().add(Version.VERSION_2_0);

    return cal;
}
 

public static Calendar createCalendar(CalDavEvent calDavEvent, DateTimeZone timeZone) {
    TimeZoneRegistry registry = TimeZoneRegistryFactory.getInstance().createRegistry();
    TimeZone timezone = registry.getTimeZone(timeZone.getID());

    Calendar calendar = new Calendar();
    calendar.getProperties().add(Version.VERSION_2_0);
    calendar.getProperties().add(new ProdId("openHAB"));
    VEvent vEvent = new VEvent();
    vEvent.getProperties().add(new Summary(calDavEvent.getName()));
    vEvent.getProperties().add(new Description(calDavEvent.getContent()));
    final DtStart dtStart = new DtStart(new net.fortuna.ical4j.model.DateTime(calDavEvent.getStart().toDate()));
    dtStart.setTimeZone(timezone);
    vEvent.getProperties().add(dtStart);
    final DtEnd dtEnd = new DtEnd(new net.fortuna.ical4j.model.DateTime(calDavEvent.getEnd().toDate()));
    dtEnd.setTimeZone(timezone);
    vEvent.getProperties().add(dtEnd);
    vEvent.getProperties().add(new Uid(calDavEvent.getId()));
    vEvent.getProperties().add(Clazz.PUBLIC);
    vEvent.getProperties()
            .add(new LastModified(new net.fortuna.ical4j.model.DateTime(calDavEvent.getLastChanged().toDate())));
    calendar.getComponents().add(vEvent);

    return calendar;
}
 

public static Calendar createCalendar(List<EventBean> events) {

        final String prodIdCompany = Unit.getInstitutionName().getContent();
        Calendar calendar = new Calendar();
        calendar.getProperties().add(new ProdId("-//" + prodIdCompany + "//" + PROD_ID_APPLICATION + "//PT"));
        calendar.getProperties().add(Version.VERSION_2_0);
        calendar.getProperties().add(CalScale.GREGORIAN);

        VTimeZone tz = TIMEZONE.getVTimeZone();
        calendar.getComponents().add(tz);

        for (EventBean eventBean : events) {
            calendar.getComponents().add(convertEventBean(eventBean));
        }
        return calendar;

    }
 

/**
 * Ensure we can get a ical4j Calendar from the generated event.
 */
@Test
public void testGeneratingCalendar() {
	
	//generate new event
	CalendarEvent event = generateEvent();
	
	//create vevent
	net.fortuna.ical4j.model.component.VEvent vevent = service.createEvent(event);
	
	//create calendar from vevent
	net.fortuna.ical4j.model.Calendar calendar = service.createCalendar(Collections.singletonList(vevent));
	
	log.debug("testGeneratingCalendar");
	log.debug("######################");
	log.debug("{}", calendar);
	
	Assert.assertNotNull(calendar);
	
	//check attributes of the ical4j calendar are what we expect and match those in the event
	Assert.assertEquals(Version.VERSION_2_0, calendar.getVersion());
	Assert.assertEquals(CalScale.GREGORIAN, calendar.getCalendarScale());
	
}
 

private Calendar buildCalendar(final OlatCalendar olatCalendar) {
    final Calendar calendar = new Calendar();
    // add standard propeties
    calendar.getProperties().add(new ProdId("-//Ben Fortuna//iCal4j 1.0//EN"));
    calendar.getProperties().add(Version.VERSION_2_0);
    calendar.getProperties().add(CalScale.GREGORIAN);
    for (final Iterator<CalendarEntry> iter = olatCalendar.getAllCalendarEntries().iterator(); iter.hasNext();) {
        final CalendarEntry kEvent = iter.next();
        final VEvent vEvent = getVEvent(kEvent);
        calendar.getComponents().add(vEvent);
    }
    return calendar;
}
 

/**
 * @param collectionItem
 * @return
 */
private Calendar getCalendarFromCollection(DavRequest req, CollectionItem collectionItem) {
    Calendar result = new Calendar();

    if (productId == null) {
        synchronized (this) {
            if (productId == null) {
                Environment environment = WebApplicationContextUtils
                        .findWebApplicationContext(req.getServletContext()).getEnvironment();
                productId = environment.getProperty(PRODUCT_ID_KEY);
            }
        }
    }

    result.getProperties().add(new ProdId(productId));
    result.getProperties().add(Version.VERSION_2_0);
    result.getProperties().add(CalScale.GREGORIAN);

    for (Item item : collectionItem.getChildren()) {
        if (!NoteItem.class.isInstance(item)) {
            continue;
        }
        for (Stamp s : item.getStamps()) {
            if (BaseEventStamp.class.isInstance(s)) {
                BaseEventStamp baseEventStamp = BaseEventStamp.class.cast(s);
                result.getComponents().add(baseEventStamp.getEvent());
            }
        }
    }
    return result;
}
 

/**
 * Obfuscates the specified calendar by removing unnecessary properties and replacing text fields with specified
 * text.
 * 
 * @param original
 *            calendar to be obfuscated
 * @param productId
 *            productId to be set for the copy calendar.
 * @param freeBusyText
 * @return obfuscated calendar.
 */
public static Calendar getFreeBusyCalendar(Calendar original, String productId, String freeBusyText) {
    // Make a copy of the original calendar
    Calendar copy = new Calendar();
    copy.getProperties().add(new ProdId(productId));
    copy.getProperties().add(Version.VERSION_2_0);
    copy.getProperties().add(CalScale.GREGORIAN);
    copy.getProperties().add(new XProperty(FREE_BUSY_X_PROPERTY, Boolean.TRUE.toString()));

    ComponentList<CalendarComponent> events = original.getComponents(Component.VEVENT);
    for (Component event : events) {
        copy.getComponents().add(getFreeBusyEvent((VEvent) event, freeBusyText));
    }
    return copy;
}
 

/**
 * Ensure we can get a ical4j Calendar from the generated event.
 */
@Test
public void testGeneratingCalendar() {
	
	//generate new event
	CalendarEvent event = generateEvent();
	
	//create vevent
	net.fortuna.ical4j.model.component.VEvent vevent = service.createEvent(event);
	
	//create calendar from vevent
	net.fortuna.ical4j.model.Calendar calendar = service.createCalendar(Collections.singletonList(vevent));
	
	log.debug("testGeneratingCalendar");
	log.debug("######################");
	log.debug("{}", calendar);
	
	Assert.assertNotNull(calendar);
	
	//check attributes of the ical4j calendar are what we expect and match those in the event
	Assert.assertEquals(Version.VERSION_2_0, calendar.getVersion());
	Assert.assertEquals(CalScale.GREGORIAN, calendar.getCalendarScale());
	
}
 

/**
 * Parses a List of Appointments into a VCALENDAR component.
 *
 * @param appointments List of Appointments for the Calendar
 * @param ownerId      Owner of the Appointments
 * @return VCALENDAR representation of the Appointments
 */
public Calendar parseAppointmentstoCalendar(List<Appointment> appointments, Long ownerId) {
	String tzid = parseTimeZone(null, userDao.get(ownerId)).getID();

	TimeZoneRegistry registry = TimeZoneRegistryFactory.getInstance().createRegistry();

	net.fortuna.ical4j.model.TimeZone timeZone = registry.getTimeZone(tzid);
	if (timeZone == null) {
		throw new NoSuchElementException("Unable to get time zone by id provided: " + tzid);
	}

	Calendar icsCalendar = new Calendar();
	icsCalendar.getProperties().add(new ProdId(PROD_ID));
	icsCalendar.getProperties().add(Version.VERSION_2_0);
	icsCalendar.getProperties().add(CalScale.GREGORIAN);
	icsCalendar.getComponents().add(timeZone.getVTimeZone());

	for (Appointment appointment : appointments) {
		DateTime start = new DateTime(appointment.getStart()), end = new DateTime(appointment.getEnd());

		VEvent meeting = new VEvent(start, end, appointment.getTitle());
		meeting = addVEventpropsfromAppointment(appointment, meeting);
		icsCalendar.getComponents().add(meeting);
	}
	return icsCalendar;
}
 

private Calendar buildCalendar(final OlatCalendar olatCalendar) {
    final Calendar calendar = new Calendar();
    // add standard propeties
    calendar.getProperties().add(new ProdId("-//Ben Fortuna//iCal4j 1.0//EN"));
    calendar.getProperties().add(Version.VERSION_2_0);
    calendar.getProperties().add(CalScale.GREGORIAN);
    for (final Iterator<CalendarEntry> iter = olatCalendar.getAllCalendarEntries().iterator(); iter.hasNext();) {
        final CalendarEntry kEvent = iter.next();
        final VEvent vEvent = getVEvent(kEvent);
        calendar.getComponents().add(vEvent);
    }
    return calendar;
}
 

/**
 * Constructor
 *
 * @param method
 *            (@see IcalHandler) constants
 */
public IcalHandler(Method method) {
	log.debug("Icalhandler method type : {}", method);

	icsCalendar = new Calendar();
	icsCalendar.getProperties().add(new ProdId("-//Events Calendar//iCal4j 1.0//EN"));
	icsCalendar.getProperties().add(Version.VERSION_2_0);
	icsCalendar.getProperties().add(CalScale.GREGORIAN);
	icsCalendar.getProperties().add(method);
}
 

private Calendar createTestCalendar() throws ParseException {
    // Create a TimeZone
    TimeZoneRegistry registry = TimeZoneRegistryFactory.getInstance().createRegistry();
    TimeZone timezone = registry.getTimeZone("America/New_York");
    VTimeZone tz = timezone.getVTimeZone();

    // Start Date is on: April 1, 2013, 9:00 am
    java.util.Calendar startDate = new GregorianCalendar();
    startDate.setTimeZone(timezone);
    startDate.set(java.util.Calendar.MONTH, java.util.Calendar.APRIL);
    startDate.set(java.util.Calendar.DAY_OF_MONTH, 1);
    startDate.set(java.util.Calendar.YEAR, 2013);
    startDate.set(java.util.Calendar.HOUR_OF_DAY, 17);
    startDate.set(java.util.Calendar.MINUTE, 0);
    startDate.set(java.util.Calendar.SECOND, 0);

    // End Date is on: April 1, 2013, 13:00
    java.util.Calendar endDate = new GregorianCalendar();
    endDate.setTimeZone(timezone);
    endDate.set(java.util.Calendar.MONTH, java.util.Calendar.APRIL);
    endDate.set(java.util.Calendar.DAY_OF_MONTH, 1);
    endDate.set(java.util.Calendar.YEAR, 2013);
    endDate.set(java.util.Calendar.HOUR_OF_DAY, 21);
    endDate.set(java.util.Calendar.MINUTE, 0);
    endDate.set(java.util.Calendar.SECOND, 0);

    // Create the event
    PropertyList propertyList = new PropertyList();
    propertyList.add(new DtStamp("20130324T180000Z"));
    propertyList.add(new DtStart(new DateTime(startDate.getTime())));
    propertyList.add(new DtEnd(new DateTime(endDate.getTime())));
    propertyList.add(new Summary("Progress Meeting"));
    VEvent meeting = new VEvent(propertyList);

    // add timezone info..
    meeting.getProperties().add(tz.getTimeZoneId());

    // generate unique identifier..
    meeting.getProperties().add(new Uid("00000000"));

    // add attendees..
    Attendee dev1 = new Attendee(URI.create("mailto:[email protected]"));
    dev1.getParameters().add(Role.REQ_PARTICIPANT);
    dev1.getParameters().add(new Cn("Developer 1"));
    meeting.getProperties().add(dev1);

    Attendee dev2 = new Attendee(URI.create("mailto:[email protected]"));
    dev2.getParameters().add(Role.OPT_PARTICIPANT);
    dev2.getParameters().add(new Cn("Developer 2"));
    meeting.getProperties().add(dev2);

    // Create a calendar
    net.fortuna.ical4j.model.Calendar icsCalendar = new net.fortuna.ical4j.model.Calendar();
    icsCalendar.getProperties().add(Version.VERSION_2_0);
    icsCalendar.getProperties().add(new ProdId("-//Events Calendar//iCal4j 1.0//EN"));
    icsCalendar.getProperties().add(CalScale.GREGORIAN);

    // Add the event and print
    icsCalendar.getComponents().add(meeting);
    return icsCalendar;
}
 

/**
 * Methods to parse Appointment to iCalendar according RFC 2445
 *
 * @param appointment to be converted to iCalendar
 * @return iCalendar representation of the Appointment
 */
public Calendar parseAppointmenttoCalendar(Appointment appointment) {
	String tzid = parseTimeZone(null, appointment.getOwner()).getID();

	TimeZoneRegistry registry = TimeZoneRegistryFactory.getInstance().createRegistry();

	net.fortuna.ical4j.model.TimeZone timeZone = registry.getTimeZone(tzid);
	if (timeZone == null) {
		throw new NoSuchElementException("Unable to get time zone by id provided: " + tzid);
	}

	Calendar icsCalendar = new Calendar();
	icsCalendar.getProperties().add(new ProdId("-//Events Calendar//Apache Openmeetings//EN"));
	icsCalendar.getProperties().add(Version.VERSION_2_0);
	icsCalendar.getProperties().add(CalScale.GREGORIAN);
	icsCalendar.getComponents().add(timeZone.getVTimeZone());

	DateTime start = new DateTime(appointment.getStart()), end = new DateTime(appointment.getEnd());

	VEvent meeting = new VEvent(start, end, appointment.getTitle());
	meeting = addVEventpropsfromAppointment(appointment, meeting);
	icsCalendar.getComponents().add(meeting);

	return icsCalendar;
}
 

/**
 * Ensure we can get a ical4j Calendar from the list of vevents.
 */
@Test
public void testGeneratingCalendarWithMultipleVEvents() {
			
	//create list of vevents
	List<net.fortuna.ical4j.model.component.VEvent> vevents = new ArrayList<net.fortuna.ical4j.model.component.VEvent>();

	for(int i=0;i<10;i++) {
		vevents.add(service.createEvent(generateEvent()));
	}
	
	//create calendar from vevent
	net.fortuna.ical4j.model.Calendar calendar = service.createCalendar(vevents);
	
	log.debug("testGeneratingCalendarWithMultipleVEvents");
	log.debug("#########################################");
	log.debug("{}", calendar);
	
	Assert.assertNotNull(calendar);
	
	//check attributes of the ical4j calendar are what we expect and match those in the event
	Assert.assertEquals(Version.VERSION_2_0, calendar.getVersion());
	Assert.assertEquals(CalScale.GREGORIAN, calendar.getCalendarScale());
	
	//TODO check count of vevents
	
}
 

/**
 * Helper method to setup the standard parts of the calendar
 * @return
 */
private Calendar setupCalendar(String method) {
	
	String serverName = sakaiProxy.getServerName();
	
	//setup calendar
	Calendar calendar = new Calendar();
	calendar.getProperties().add(new ProdId("-//"+serverName+"//Sakai External Calendaring Service//EN"));
	calendar.getProperties().add(Version.VERSION_2_0);
	calendar.getProperties().add(CalScale.GREGORIAN);
	if (method != null) {
		calendar.getProperties().add(new Method(method));
	}
	return calendar;
}
 

public static Calendar newCalendar() {
  final Calendar cal = new Calendar();
  cal.getProperties().add(new ProdId(PRODUCT_ID));
  cal.getProperties().add(Version.VERSION_2_0);
  cal.getProperties().add(CalScale.GREGORIAN);
  return cal;
}
 

/**
 * Ensure we can get a ical4j Calendar from the list of vevents.
 */
@Test
public void testGeneratingCalendarWithMultipleVEvents() {
			
	//create list of vevents
	List<net.fortuna.ical4j.model.component.VEvent> vevents = new ArrayList<net.fortuna.ical4j.model.component.VEvent>();

	for(int i=0;i<10;i++) {
		vevents.add(service.createEvent(generateEvent()));
	}
	
	//create calendar from vevent
	net.fortuna.ical4j.model.Calendar calendar = service.createCalendar(vevents);
	
	log.debug("testGeneratingCalendarWithMultipleVEvents");
	log.debug("#########################################");
	log.debug("{}", calendar);
	
	Assert.assertNotNull(calendar);
	
	//check attributes of the ical4j calendar are what we expect and match those in the event
	Assert.assertEquals(Version.VERSION_2_0, calendar.getVersion());
	Assert.assertEquals(CalScale.GREGORIAN, calendar.getCalendarScale());
	
	//TODO check count of vevents
	
}
 

/**
 * Creates a simple item which will be checked with simpleCheckCallExpectedHandler.
 *  
 * @param user
 * @return
 * @throws URISyntaxException
 */
private ContentItem createSimpleContentItem(User user) throws URISyntaxException {
    //call service
    ContentItem contentItem = testHelper.makeDummyContent(user);


    HibEventStamp eventStamp = new HibEventStamp();
    VEvent vEvent = new VEvent();
    vEvent.getProperties().add(Method.REQUEST);
    vEvent.getProperties().add(Version.VERSION_2_0);
    
    Attendee dev1 = new Attendee(URI.create("MAILTO:" + ATTENDEE_1));
    dev1.getParameters().add(Role.REQ_PARTICIPANT);
    dev1.getParameters().add(PartStat.NEEDS_ACTION);
    dev1.getParameters().add(Rsvp.TRUE);
    vEvent.getProperties().add(dev1);
            
    Organizer  organizer = new Organizer("MAILTO:" + ORGANIZER);        
    vEvent.getProperties().add(organizer);
    vEvent.getProperties().add(Status.VEVENT_CONFIRMED);
    vEvent.getProperties().add(Transp.OPAQUE);
        
    Calendar calendar = new Calendar();
    calendar.getComponents().add(vEvent);
        
    eventStamp.setEventCalendar(calendar);        
    contentItem.addStamp(eventStamp);
    return contentItem;
}
 

protected static Calendar createTestCalendar(ZonedDateTime start, ZonedDateTime end, String summary, String attendee) {
    // Create a TimeZone
    TimeZoneRegistry registry = TimeZoneRegistryFactory.getInstance().createRegistry();
    String tzId = start.getZone().getId();
    TimeZone timezone = registry.getTimeZone(tzId.equals("Z") ? "UTC" : tzId);
    VTimeZone tz = timezone.getVTimeZone();

    // Create the event
    PropertyList propertyList = new PropertyList();
    DateTime ts = new DateTime(true);
    ts.setTime(0);
    propertyList.add(new DtStamp(ts));
    propertyList.add(new DtStart(toDateTime(start, registry)));
    propertyList.add(new DtEnd(toDateTime(end, registry)));
    propertyList.add(new Summary(summary));
    VEvent meeting = new VEvent(propertyList);

    // add timezone info..
    meeting.getProperties().add(tz.getTimeZoneId());

    // generate unique identifier..
    meeting.getProperties().add(new Uid("00000000"));

    // add attendees..
    Attendee dev1 = new Attendee(URI.create("mailto:" + attendee));
    dev1.getParameters().add(Role.REQ_PARTICIPANT);
    dev1.getParameters().add(new Cn(attendee));
    meeting.getProperties().add(dev1);

    // Create a calendar
    net.fortuna.ical4j.model.Calendar icsCalendar = new net.fortuna.ical4j.model.Calendar();
    icsCalendar.getProperties().add(Version.VERSION_2_0);
    icsCalendar.getProperties().add(new ProdId("-//Events Calendar//iCal4j 1.0//EN"));
    icsCalendar.getProperties().add(CalScale.GREGORIAN);

    // Add the event and print
    icsCalendar.getComponents().add(meeting);
    return icsCalendar;
}
 

/**
 * Helper method to setup the standard parts of the calendar
 * @return
 */
private Calendar setupCalendar(String method) {
	
	String serverName = sakaiProxy.getServerName();
	
	//setup calendar
	Calendar calendar = new Calendar();
	calendar.getProperties().add(new ProdId("-//"+serverName+"//Sakai External Calendaring Service//EN"));
	calendar.getProperties().add(Version.VERSION_2_0);
	calendar.getProperties().add(CalScale.GREGORIAN);
	if (method != null) {
		calendar.getProperties().add(new Method(method));
	}
	return calendar;
}
 

/**
 * Create a base Calendar containing no components.
 * @return base Calendar
 */
public static Calendar createBaseCalendar() {
    Calendar cal = new Calendar();
    cal.getProperties().add(new ProdId(CosmoConstants.PRODUCT_ID));
    cal.getProperties().add(Version.VERSION_2_0);
    cal.getProperties().add(CalScale.GREGORIAN);
    
    return cal;
}
 

public void simpleInvitionIcalLink() {
	// Create a TimeZone
	TimeZoneRegistry registry = TimeZoneRegistryFactory.getInstance().createRegistry();
	TimeZone timezone = registry.getTimeZone("America/Mexico_City");
	VTimeZone tz = timezone.getVTimeZone();

	// Start Date is on: April 1, 2008, 9:00 am
	java.util.Calendar startDate = new GregorianCalendar();
	startDate.setTimeZone(timezone);
	startDate.set(java.util.Calendar.MONTH, java.util.Calendar.APRIL);
	startDate.set(java.util.Calendar.DAY_OF_MONTH, 1);
	startDate.set(java.util.Calendar.YEAR, 2008);
	startDate.set(java.util.Calendar.HOUR_OF_DAY, 9);
	startDate.set(java.util.Calendar.MINUTE, 0);
	startDate.set(java.util.Calendar.SECOND, 0);

	// End Date is on: April 1, 2008, 13:00
	java.util.Calendar endDate = new GregorianCalendar();
	endDate.setTimeZone(timezone);
	endDate.set(java.util.Calendar.MONTH, java.util.Calendar.APRIL);
	endDate.set(java.util.Calendar.DAY_OF_MONTH, 1);
	endDate.set(java.util.Calendar.YEAR, 2008);
	endDate.set(java.util.Calendar.HOUR_OF_DAY, 13);
	endDate.set(java.util.Calendar.MINUTE, 0);
	endDate.set(java.util.Calendar.SECOND, 0);

	// Create the event
	String eventName = "Progress Meeting";
	DateTime start = new DateTime(startDate.getTime());
	DateTime end = new DateTime(endDate.getTime());
	VEvent meeting = new VEvent(start, end, eventName);

	// add timezone info..
	meeting.getProperties().add(tz.getTimeZoneId());

	// generate unique identifier..
	Uid uid = new Uid(randomUUID().toString());
	meeting.getProperties().add(uid);

	// add attendees..
	Attendee dev1 = new Attendee(URI.create("mailto:[email protected]"));
	dev1.getParameters().add(Role.REQ_PARTICIPANT);
	dev1.getParameters().add(new Cn("Developer 1"));
	meeting.getProperties().add(dev1);

	Attendee dev2 = new Attendee(URI.create("mailto:[email protected]"));
	dev2.getParameters().add(Role.OPT_PARTICIPANT);
	dev2.getParameters().add(new Cn("Developer 2"));
	meeting.getProperties().add(dev2);

	// Create a calendar
	net.fortuna.ical4j.model.Calendar icsCalendar = new net.fortuna.ical4j.model.Calendar();
	icsCalendar.getProperties().add(
			new ProdId("-//Events Calendar//iCal4j 1.0//EN"));
	icsCalendar.getProperties().add(CalScale.GREGORIAN);
	icsCalendar.getProperties().add(Version.VERSION_2_0);

	// Add the event and print
	icsCalendar.getComponents().add(meeting);

	Organizer orger = new Organizer(URI.create("[email protected]"));
	orger.getParameters().add(new Cn("Sebastian Wagner"));
	meeting.getProperties().add(orger);

	icsCalendar.getProperties().add(Method.REQUEST);

	log.debug(icsCalendar.toString());

	ByteArrayOutputStream bout = new ByteArrayOutputStream();
	CalendarOutputter outputter = new CalendarOutputter();
	try {
		outputter.output(icsCalendar, bout);
		iCalMimeBody = bout.toByteArray();

		sendIcalMessage();
	} catch (Exception e) {
		log.error("Error", e);
	}
}
 

/**
 * creates a calendar for the user, identified by his name and authentication key.
 * @param params
 * 
 * @param userName
 * @param userKey
 * @return a calendar, null if authentication fails
 */
private Calendar createCal(final Map<String, String> params, final Integer userId, final String authKey, final String timesheetUserParam)
{
  final UserDao userDao = Registry.instance().getDao(UserDao.class);
  final PFUserDO loggedInUser = userDao.getUserByAuthenticationToken(userId, authKey);

  if (loggedInUser == null) {
    return null;
  }
  PFUserDO timesheetUser = null;
  if (StringUtils.isNotBlank(timesheetUserParam) == true) {
    final Integer timesheetUserId = NumberHelper.parseInteger(timesheetUserParam);
    if (timesheetUserId != null) {
      if (timesheetUserId.equals(loggedInUser.getId()) == false) {
        log.error("Not yet allowed: all users are only allowed to download their own time-sheets.");
        return null;
      }
      timesheetUser = userDao.getUserGroupCache().getUser(timesheetUserId);
      if (timesheetUser == null) {
        log.error("Time-sheet user with id '" + timesheetUserParam + "' not found.");
        return null;
      }
    }
  }
  // creating a new calendar
  final Calendar calendar = new Calendar();
  final Locale locale = PFUserContext.getLocale();
  calendar.getProperties().add(
      new ProdId("-//" + loggedInUser.getDisplayUsername() + "//ProjectForge//" + locale.toString().toUpperCase()));
  calendar.getProperties().add(Version.VERSION_2_0);
  calendar.getProperties().add(CalScale.GREGORIAN);

  // setup event is needed for empty calendars
  calendar.getComponents().add(new VEvent(new net.fortuna.ical4j.model.Date(0), SETUP_EVENT));

  // adding events
  for (final VEvent event : getEvents(params, timesheetUser)) {
    calendar.getComponents().add(event);
  }
  return calendar;
}
 

/**
 * Builds calendar.
 * @param d The document.
 * @param handler The content handler.
 * @throws ParserException - if something is wrong this exception is thrown.
 */
private void buildCalendar(Document d, ContentHandler handler) throws ParserException {
    // "The root class name for hCalendar is "vcalendar". An element with a
    // class name of "vcalendar" is itself called an hCalendar.
    //
    // The root class name for events is "vevent". An element with a class
    // name of "vevent" is itself called an hCalender event.
    //
    // For authoring convenience, both "vevent" and "vcalendar" are
    // treated as root class names for parsing purposes. If a document
    // contains elements with class name "vevent" but not "vcalendar", the
    // entire document has an implied "vcalendar" context."

    // XXX: We assume that the entire document has a single vcalendar
    // context. It is possible that the document contains more than one
    // vcalendar element. In this case, we should probably only process
    // that element and log a warning about skipping the others.

    if (LOG.isDebugEnabled()) {
        LOG.debug("Building calendar");
    }

    handler.startCalendar();

    // no PRODID, as the using application should set that itself

    handler.startProperty(Property.VERSION);
    try {
        handler.propertyValue(Version.VERSION_2_0.getValue());
    } catch (URISyntaxException | ParseException | IOException e) {
        LOG.warn("", e);
    } 
    handler.endProperty(Property.VERSION);

    for (Element vevent : findElements(XPATH_VEVENTS, d)) {
        buildEvent(vevent, handler);
    }

    // XXX: support other "first class components": vjournal, vtodo,
    // vfreebusy, vavailability, vvenue

    handler.endCalendar();
}