public void testTimeZoneHelperToICalendarCanberra() {
TimeZoneHelper vctz =
new TimeZoneHelper(
"Australia/Canberra",
1167609600000L, // 01 Jan 2007 @ 00:00:00 UTC
1349049600000L); // 01 Oct 2012 @ 00:00:00 UTC
VTimezone vtz = vctz.getVTimezone();
List<VComponent> dayLightComponents = vtz.getComponents("DAYLIGHT");
List<VComponent> standardComponents = vtz.getComponents("STANDARD");
assertEquals("Australia/Canberra", vtz.getProperty("TZID").getValue());
assertEquals(1, dayLightComponents.size());
TzDaylightComponent dayLight = (TzDaylightComponent) dayLightComponents.get(0);
assertEquals("+1000", dayLight.getProperty("TZOFFSETFROM").getValue());
assertEquals("+1100", dayLight.getProperty("TZOFFSETTO").getValue());
assertEquals("20061029T020000", dayLight.getProperty("DTSTART").getValue());
assertEquals(
"FREQ=YEARLY;INTERVAL=1;BYDAY=-1SU;BYMONTH=10", dayLight.getProperty("RRULE").getValue());
assertEquals(1, standardComponents.size());
TzStandardComponent standard = (TzStandardComponent) standardComponents.get(0);
assertEquals("+1100", standard.getProperty("TZOFFSETFROM").getValue());
assertEquals("+1000", standard.getProperty("TZOFFSETTO").getValue());
assertEquals("20070325T030000", standard.getProperty("DTSTART").getValue());
assertEquals(
"FREQ=YEARLY;INTERVAL=1;BYDAY=-1SU;BYMONTH=3", standard.getProperty("RRULE").getValue());
}
public void testTimeZoneHelperToICalendarBogota() {
TimeZoneHelper vctz =
new TimeZoneHelper(
"America/Bogota",
0L, // 01 Jan 1970 @ 00:00:00 UTC
1324771200000L); // 25 Dec 2011 @ 00:00:00 UTC
VTimezone vtz = vctz.getVTimezone();
List<VComponent> dayLightComponents = vtz.getComponents("DAYLIGHT");
List<VComponent> standardComponents = vtz.getComponents("STANDARD");
assertEquals("America/Bogota", vtz.getProperty("TZID").getValue());
assertEquals(0, dayLightComponents.size());
assertEquals(2, standardComponents.size());
TzStandardComponent standard = (TzStandardComponent) standardComponents.get(0);
assertEquals("-0500", standard.getProperty("TZOFFSETFROM").getValue());
assertEquals("-0400", standard.getProperty("TZOFFSETTO").getValue());
assertEquals("19920503T000000", standard.getProperty("DTSTART").getValue());
assertEquals("19920503T000000", standard.getProperty("RDATE").getValue());
standard = (TzStandardComponent) standardComponents.get(1);
assertEquals("-0400", standard.getProperty("TZOFFSETFROM").getValue());
assertEquals("-0500", standard.getProperty("TZOFFSETTO").getValue());
assertEquals("19930404T000000", standard.getProperty("DTSTART").getValue());
assertEquals("19930404T000000", standard.getProperty("RDATE").getValue());
}
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)
}
@SuppressWarnings("unchecked")
public void testTimeZoneHelperCheckAllOlsonIDsWithICalendar() throws Exception {
int mistakes = 0; // counter for mistakes in time zone handling
/*
* Max number of mistakes allowed. This value should be lowered as soon
* as improvements in the code that handles time zones reduce the
* number of mistakes. In this way, this test can be used to certify
* that the number of properly handled time zones is being constantly
* raised.
*/
final int MAX_MISTAKES = 125;
System.out.println("================================= iCalendar (2.0)");
for (String id : (Set<String>) DateTimeZone.getAvailableIDs()) {
TimeZoneHelper vctzOut =
new TimeZoneHelper(
id,
// 0L, // 01 Jan 1970 @ 00:00:00 UTC
915148800000L, // 01 Jan 1999 @ 00:00:00 UTC
1324771200000L); // 25 Dec 2011 @ 00:00:00 UTC
VTimezone vTimezone = vctzOut.getVTimezone();
// Uncomment this to debug the iCalendar items referring to one
// continent:
/*
String continent = "Australia"; // or whatever you want to watch
if (id.startsWith(continent)) {
System.out.println("\n\n" + vTimezone);
}
*/
vTimezone.getProperty("TZID").setValue(""); // The name should not be used as a hint for
// this "test"
TimeZoneHelper vctzIn =
new TimeZoneHelper(
vTimezone,
915148800000L, // 01 Jan 1999 @ 00:00:00 UTC
1324771200000L); // 25 Dec 2011 @ 00:00:00 UTC
System.out.print('\n' + id + " --> " + vctzIn.toID());
vctzIn.clearCachedID();
String guess = vctzIn.toID(id);
if (!id.equals(guess)) {
System.out.print(" (WRONG!)");
mistakes++;
}
}
System.out.println("\n\n" + mistakes + " time zones were not properly handled.");
assertTrue(mistakes <= MAX_MISTAKES);
System.out.println();
}
/**
* Creates a new instance of TimeZoneHelper on the basis of the information extracted from an
* iCalendar (vCalendar 2.0) item.
*
* @param vTimeZone
* @param from the start of the relevant time interval for the generation of transitions (an
* istant expressed as a long)
* @param to the end of the relevant time interval for the generation of transitions (an istant
* expressed as a long)
* @throws java.lang.Exception
*/
public TimeZoneHelper(VTimezone vTimeZone, long from, long to) throws Exception {
setFormattersToUTC();
Property tzID = vTimeZone.getProperty("TZID");
if (tzID != null) {
this.name = tzID.getValue();
// Try and skip the parsing by using just the TZID:
String extracted = extractID(name);
if (extracted != null) {
cacheID(extracted);
processID(extracted, from, to);
return;
}
List<VComponent> standardTimeRules = vTimeZone.getComponents("STANDARD");
List<VComponent> summerTimeRules = vTimeZone.getComponents("DAYLIGHT");
String standardTimeOffset;
if (standardTimeRules.isEmpty()) {
if (summerTimeRules.isEmpty()) {
throw new Exception("Empty VTIMEZONE");
} else {
standardTimeOffset = summerTimeRules.get(0).getProperty("TZOFFSETFROM").getValue();
}
} else {
standardTimeOffset = standardTimeRules.get(0).getProperty("TZOFFSETTO").getValue();
}
basicOffset = parseOffset(standardTimeOffset);
for (VComponent standardTimeRule : standardTimeRules) {
addTransitions(standardTimeRule, from, to);
}
for (VComponent summerTimeRule : summerTimeRules) {
addTransitions(summerTimeRule, from, to);
}
Collections.sort(transitions);
} else {
this.name = ""; // This should not happen!
}
}
public void testTimeZoneHelperToICalendarJohannesburg() {
TimeZoneHelper vctz =
new TimeZoneHelper(
"Africa/Johannesburg",
0L, // 01 Jan 1970 @ 00:00:00 UTC
1324771200000L); // 25 Dec 2011 @ 00:00:00 UTC
VTimezone vtz = vctz.getVTimezone();
List<VComponent> dayLightComponents = vtz.getComponents("DAYLIGHT");
List<VComponent> standardComponents = vtz.getComponents("STANDARD");
assertEquals("Africa/Johannesburg", vtz.getProperty("TZID").getValue());
assertEquals(0, dayLightComponents.size());
assertEquals(1, standardComponents.size());
TzStandardComponent standard = (TzStandardComponent) standardComponents.get(0);
assertEquals("+0200", standard.getProperty("TZOFFSETFROM").getValue());
assertEquals("+0200", standard.getProperty("TZOFFSETTO").getValue());
assertEquals("19700101T000000", standard.getProperty("DTSTART").getValue());
assertEquals("19700101T000000", standard.getProperty("RDATE").getValue());
}
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;
}
