public static TimezoneMap fromConsensusTimezoneMap(
final TreeMap<String, TimeZone> consensusTimezoneMap) {
TimezoneMap timezoneMap = new TimezoneMap();
Long holdStartMillis = null;
DateTimeZone holdDateTimezone = null;
Long lastEndMillis = null;
for (String date : consensusTimezoneMap.keySet()) {
final TimeZone timeZone = consensusTimezoneMap.get(date);
final DateTimeZone dateTimeZone = DateTimeZone.forTimeZone(timeZone);
final DateTime thisStartDateTime =
TimeUtils.dateFormatter.withZone(dateTimeZone).parseDateTime(date);
final long thisStartMillis = thisStartDateTime.getMillis();
// Check if we need to flush a prior segment
if (holdStartMillis != null && holdDateTimezone != dateTimeZone) {
// Yes, this differs, end the previous segment with holdStartMillis as its
// start time and thisStartMillis-1 as its end time
timezoneMap.add(holdStartMillis, thisStartMillis - 1, holdDateTimezone);
// Update holdStartMillis and holdDateTimezone for next time to be the start of this segment
holdStartMillis = thisStartMillis;
holdDateTimezone = dateTimeZone;
} else if (holdStartMillis == null) {
// This is the first time through, hold onto holdStartMillis and holdDateTimezone
// for next time to be the start of the first segment
holdStartMillis = thisStartMillis;
holdDateTimezone = dateTimeZone;
} else {
// Continue with the earlier timezone, no need to change anything
}
// Update lastEndMillis for closing up on the last segment
lastEndMillis = thisStartMillis + DateTimeConstants.MILLIS_PER_DAY;
}
// Flush the last segment (unless it's empty)
if (holdDateTimezone != null) {
timezoneMap.add(holdStartMillis, lastEndMillis, holdDateTimezone);
}
return timezoneMap;
}
public static void main(final String[] args) {
// Create test table
TimezoneMap tzMap = new TimezoneMap();
// Create sample tzMap based on Anne's BodyMedia map:
// [ { "endDate" : "20110822T220048-0400", "startDate" : "20101221T000000-0500", "value" :
// "US/Eastern"},
// { "endDate" : "20110921T192919-0700", "startDate" : "20110822T190048-0700", "value" :
// "US/Pacific"},
// { "startDate" : "20110921T222919-0400","value" : "US/Eastern"
// } ]
// Then extended to have a segment in Central time starting Wed, 22 May 2013 13:45:56 GMT and
// ending
// Sat, 01 Jun 2013 00:00:00 GMT
tzMap.add(1292907600000L, 1314064848000L, DateTimeZone.forID("America/New_York"));
tzMap.add(1314064848000L, 1316658559000L, DateTimeZone.forID("America/Los_Angeles"));
tzMap.add(1316658559000L, 1369230356963L, DateTimeZone.forID("America/New_York"));
tzMap.add(1369230356963L, 1370044800000L, DateTimeZone.forID("US/Central"));
// This should be Eastern
LocalDate d1 = new LocalDate(2011, 6, 15);
tzMap.getStartOfDate(d1);
// This should be Eastern
LocalDate d2 = new LocalDate(2011, 8, 22);
tzMap.getStartOfDate(d2);
// This should be Pacific
LocalDate d3 = new LocalDate(2011, 8, 23);
tzMap.getStartOfDate(d3);
// This should be Eastern
LocalDate d3b = new LocalDate(2013, 5, 22);
tzMap.getStartOfDate(d3b);
// This should be Central
LocalDate d3c = new LocalDate(2013, 5, 23);
tzMap.getStartOfDate(d3c);
// Get from before the start of the map. This should default to using the first item in the map
// and return
// in America/New_York
LocalDate d4 = new LocalDate(2010, 12, 21);
tzMap.getStartOfDate(d4);
LocalDate d5 = new LocalDate(2010, 1, 1);
tzMap.getStartOfDate(d5);
// Get from past the end of the map. This should be Central
LocalDate d6 = new LocalDate(2013, 6, 2);
tzMap.getStartOfDate(d6);
LocalDate d7 = new LocalDate(2013, 8, 2);
tzMap.getStartOfDate(d7);
// Try out fromConsensusTimezoneMap
TreeMap<String, TimeZone> ctm1 = new TreeMap<String, TimeZone>();
ctm1.put("2011-06-05", TimeZone.getTimeZone("America/New_York"));
TimezoneMap tzm1 = fromConsensusTimezoneMap(ctm1);
int tzm1S = tzm1.spans.size(); // should be 1 covering 6/15/11
ctm1.put("2012-06-05", TimeZone.getTimeZone("America/New_York"));
TimezoneMap tzm2 = fromConsensusTimezoneMap(ctm1);
int tzm2S = tzm2.spans.size(); // should be 1 covering 6/15/11 - 6/15/12
ctm1.put("2011-12-05", TimeZone.getTimeZone("US/Central"));
TimezoneMap tzm3 = fromConsensusTimezoneMap(ctm1);
int tzm3S =
tzm3.spans
.size(); // should be 3 covering 6/15/11 - 2011-12-04, 2011-12-05 - 6/14/12, and 6/15/12
}
