public void testTimeZoneHelperFromICalendarBerlinUntil() throws Exception {
VTimezone vtz = new VTimezone();
vtz.addProperty("TZID", "Berlino"); // No hint
TzStandardComponent standardC = new TzStandardComponent();
standardC.addProperty("TZOFFSETFROM", "+0200");
standardC.addProperty("TZOFFSETTO", "+0100");
standardC.addProperty("TZNAME", "CET");
standardC.addProperty("DTSTART", "19701025T030000");
standardC.addProperty(
"RRULE", "FREQ=YEARLY;INTERVAL=1;BYDAY=-1SU;BYMONTH=10;UNTIL=20091231T000113Z");
TzDaylightComponent dayLightC = new TzDaylightComponent();
dayLightC.addProperty("TZOFFSETFROM", "+0100");
dayLightC.addProperty("TZOFFSETTO", "+0200");
dayLightC.addProperty("TZNAME", "CEST");
dayLightC.addProperty("DTSTART", "19700329T020000");
dayLightC.addProperty(
"RRULE", "FREQ=YEARLY;INTERVAL=1;BYDAY=-1SU;BYMONTH=3;UNTIL=20091231T000113Z");
vtz.addStandardc(standardC);
vtz.addDaylightc(dayLightC);
TimeZoneHelper vctz =
new TimeZoneHelper(
vtz,
1167609600000L, // 01 Jan 2007 @ 00:00:00 UTC
1324771200000L); // 25 Dec 2011 @ 00:00:00 UTC
List<TimeZoneTransition> transitions = vctz.getTransitions();
assertEquals("Berlino", vctz.getName());
assertEquals(6, transitions.size());
assertEquals(3600000, vctz.getBasicOffset());
boolean dst = true;
for (TimeZoneTransition transition : transitions) {
if (dst) {
assertEquals("CEST", transition.getName());
} else {
assertEquals("CET", transition.getName());
}
dst = !dst;
}
assertEquals(7200000, transitions.get(0).getOffset());
assertEquals(1174784400000L, transitions.get(0).getTime());
assertEquals(3600000, transitions.get(1).getOffset());
assertEquals(1193533200000L, transitions.get(1).getTime());
assertEquals(7200000, transitions.get(2).getOffset());
assertEquals(1206838800000L, transitions.get(2).getTime());
assertEquals(3600000, transitions.get(3).getOffset());
assertEquals(1224982800000L, transitions.get(3).getTime());
assertEquals(7200000, transitions.get(4).getOffset());
assertEquals(1238288400000L, transitions.get(4).getTime());
assertEquals(3600000, transitions.get(5).getOffset());
assertEquals(1256432400000L, transitions.get(5).getTime());
assertEquals("Europe/Berlin", vctz.toID()); // First run
assertEquals("Europe/Berlin", vctz.toID()); // Second run (cached)
}
protected static VTimezone toVTimezone(
List<ICalendarTimeZoneTransition> iCalendarTransitions, String id, int basicOffset) {
VTimezone vtz = new VTimezone();
vtz.addProperty("TZID", id);
TzDaylightComponent summerTimeRDates = null;
TzStandardComponent standardTimeRDates = null;
String standardTimeOffset = formatOffset(basicOffset);
// Visits all transitions in cronological order
for (int i = 0; i < iCalendarTransitions.size(); ) {
// If it's the last transition, or it's a transition that is not
// part of the standard/day-light time series, the special case must
// be separately treated
if ((i == iCalendarTransitions.size() - 1)
|| (!areHalfYearFar(
iCalendarTransitions.get(i).getTime(), iCalendarTransitions.get(i + 1).getTime()))) {
// "Burns" components that may be present in the buffer
if (summerTimeRDates != null) {
vtz.addComponent(summerTimeRDates);
vtz.addComponent(standardTimeRDates);
summerTimeRDates = null;
standardTimeRDates = null;
}
// Creates a new STANDARD component of the RDATE kind
TzStandardComponent specialRDate = new TzStandardComponent();
String specialCaseTime = iCalendarTransitions.get(i).getTimeISO1861();
specialRDate.addProperty("DTSTART", specialCaseTime);
specialRDate.addProperty("RDATE", specialCaseTime);
specialRDate.addProperty("TZOFFSETFROM", standardTimeOffset);
standardTimeOffset = // It needs be updated
formatOffset(iCalendarTransitions.get(i).getOffset());
specialRDate.addProperty("TZOFFSETTO", standardTimeOffset);
specialRDate.addProperty("TZNAME", iCalendarTransitions.get(i).getName());
vtz.addComponent(specialRDate); // Burns it
i++; // Moves on to the next transition
continue;
}
String lastOffset = standardTimeOffset;
String summerTimeOffset = formatOffset(iCalendarTransitions.get(i).getOffset());
standardTimeOffset = formatOffset(iCalendarTransitions.get(i + 1).getOffset());
String summerTimeStart = iCalendarTransitions.get(i).getTimeISO1861();
String standardTimeStart = iCalendarTransitions.get(i + 1).getTimeISO1861();
ICalendarTimeZoneTransition summerTimeClusterStart = iCalendarTransitions.get(i);
ICalendarTimeZoneTransition standardTimeClusterStart = iCalendarTransitions.get(i + 1);
int j; // Summer-time starts, backward instance count
int k; // Summer-time starts, forward instance count
int l; // Summer-time ends, backward instance count
int m; // Summer-time ends, forward instance count
for (j = i + 2; j < iCalendarTransitions.size(); j += 2) {
ICalendarTimeZoneTransition clusterMember = iCalendarTransitions.get(j);
if (!summerTimeClusterStart.matchesRecurrence(clusterMember, true)) {
break;
}
}
for (k = i + 2; k < iCalendarTransitions.size(); k += 2) {
ICalendarTimeZoneTransition clusterMember = iCalendarTransitions.get(k);
if (!summerTimeClusterStart.matchesRecurrence(clusterMember, false)) {
break;
}
}
for (l = i + 3; l < iCalendarTransitions.size(); l += 2) {
ICalendarTimeZoneTransition clusterMember = iCalendarTransitions.get(l);
if (!standardTimeClusterStart.matchesRecurrence(clusterMember, true)) {
break;
}
}
for (m = i + 3; m < iCalendarTransitions.size(); m += 2) {
ICalendarTimeZoneTransition clusterMember = iCalendarTransitions.get(m);
if (!standardTimeClusterStart.matchesRecurrence(clusterMember, false)) {
break;
}
}
boolean backwardInstanceCountForStarts = true;
boolean backwardInstanceCountForEnds = true;
if (k > j) { // counting istances in the forward direction makes a
// longer summer-time-start series
j = k; // j is now the longest series of summer-time starts
backwardInstanceCountForStarts = false;
}
if (m > l) { // counting istances in the forward direction makes a
// longer summer-time-end series
l = m; // l is now the longest series of summer-time ends
backwardInstanceCountForEnds = false;
}
j -= 2; // Compensates for the end condition of the for cycle above
l -= 2; // Compensates for the end condition of the for cycle above
if (l > j + 1) {
l = j + 1; // l is now the best acceptable end for a
// combined start-end series
} else {
j = l - 1;
}
// At this point, l + 1 = j
if (l > i + 1) { // more than one year: there's a recurrence
if (summerTimeRDates != null) {
vtz.addComponent(summerTimeRDates);
vtz.addComponent(standardTimeRDates);
}
// Create a new DAYLIGHT component
summerTimeRDates = new TzDaylightComponent();
summerTimeRDates.addProperty("DTSTART", summerTimeStart);
StringBuffer summerTimeRRule = new StringBuffer("FREQ=YEARLY;INTERVAL=1;BYDAY=");
if (backwardInstanceCountForStarts) {
summerTimeRRule.append("-1");
} else {
summerTimeRRule.append('+').append(summerTimeClusterStart.getInstance());
}
summerTimeRRule
.append(getDayOfWeekAbbreviation(summerTimeClusterStart.getDayOfWeek()))
.append(";BYMONTH=")
.append(summerTimeClusterStart.getMonth() + 1); // Jan must be 1
if (j < iCalendarTransitions.size() - 2) {
summerTimeRRule.append(";UNTIL=").append(iCalendarTransitions.get(j).getTimeISO1861());
}
summerTimeRDates.addProperty("RRULE", summerTimeRRule.toString());
summerTimeRDates.addProperty("TZOFFSETFROM", lastOffset);
summerTimeRDates.addProperty("TZOFFSETTO", summerTimeOffset);
summerTimeRDates.addProperty("TZNAME", iCalendarTransitions.get(i).getName());
// Create a new STANDARD component
standardTimeRDates = new TzStandardComponent();
standardTimeRDates.addProperty("DTSTART", standardTimeStart);
StringBuffer standardTimeRRule = new StringBuffer("FREQ=YEARLY;INTERVAL=1;BYDAY=");
if (backwardInstanceCountForEnds) {
standardTimeRRule.append("-1");
} else {
standardTimeRRule.append('+').append(standardTimeClusterStart.getInstance());
}
standardTimeRRule
.append(getDayOfWeekAbbreviation(standardTimeClusterStart.getDayOfWeek()))
.append(";BYMONTH=")
.append(standardTimeClusterStart.getMonth() + 1); // Jan must be 1
if (l < iCalendarTransitions.size() - 1) {
standardTimeRRule.append(";UNTIL=").append(iCalendarTransitions.get(l).getTimeISO1861());
}
standardTimeRDates.addProperty("RRULE", standardTimeRRule.toString());
standardTimeRDates.addProperty("TZOFFSETFROM", summerTimeOffset);
standardTimeRDates.addProperty("TZOFFSETTO", standardTimeOffset);
standardTimeRDates.addProperty("TZNAME", iCalendarTransitions.get(i + 1).getName());
vtz.addComponent(summerTimeRDates);
vtz.addComponent(standardTimeRDates);
summerTimeRDates = null;
standardTimeRDates = null;
i = j; // Increases the counter to jump beyond the recurrence
} else { // just one year: i, i+1 are transitions of the RDATE kind
if (summerTimeRDates == null) {
// Create a new DAYLIGHT component
summerTimeRDates = new TzDaylightComponent();
summerTimeRDates.addProperty("DTSTART", summerTimeStart);
summerTimeRDates.addProperty("RDATE", summerTimeStart);
summerTimeRDates.addProperty("TZOFFSETFROM", lastOffset);
summerTimeRDates.addProperty("TZOFFSETTO", summerTimeOffset);
summerTimeRDates.addProperty("TZNAME", iCalendarTransitions.get(i).getName());
// Create a new STANDARD component
standardTimeRDates = new TzStandardComponent();
standardTimeRDates.addProperty("DTSTART", standardTimeStart);
standardTimeRDates.addProperty("RDATE", standardTimeStart);
standardTimeRDates.addProperty("TZOFFSETFROM", summerTimeOffset);
standardTimeRDates.addProperty("TZOFFSETTO", standardTimeOffset);
standardTimeRDates.addProperty("TZNAME", iCalendarTransitions.get(i + 1).getName());
} else {
Property rdate = summerTimeRDates.getProperty("RDATE");
rdate.setValue(rdate.getValue() + ';' + summerTimeStart);
summerTimeRDates.setProperty(rdate);
rdate = standardTimeRDates.getProperty("RDATE");
rdate.setValue(rdate.getValue() + ';' + standardTimeStart);
standardTimeRDates.setProperty(rdate);
}
}
i += 2;
}
if (summerTimeRDates != null) {
vtz.addComponent(summerTimeRDates);
vtz.addComponent(standardTimeRDates);
summerTimeRDates = null;
standardTimeRDates = null;
}
return vtz;
}