();
for (String zid : all) {
// This is VERY inefficient.
TimeZone z = TimeZone.getTimeZone(zid);
// Make sure we get back the ID we wanted (if the ID is
// invalid we get back GMT).
if (z != null && z.getID().equals(zid) && z.getRawOffset() == offset) {
zones.add(zid);
}
}
if (zones.size() > 0) {
ids = zones.toArray(new String[zones.size()]);
}
}
if (ids == null) {
ids = new String[0];
}
return ids;
}
/**
* Returns the number of IDs in the equivalency group that
* includes the given ID. An equivalency group contains zones
* that behave identically to the given zone.
*
* If there are no equivalent zones, then this method returns
* 0. This means either the given ID is not a valid zone, or it
* is and there are no other equivalent zones.
* @param id a system time zone ID
* @return the number of zones in the equivalency group containing
* 'id', or zero if there are no equivalent zones.
* @see #getEquivalentID
*/
public static synchronized int countEquivalentIDs(String id) {
int count = 0;
try {
UResourceBundle res = openOlsonResource(null, id);
UResourceBundle links = res.get("links");
int[] v = links.getIntVector();
count = v.length;
} catch (MissingResourceException ex) {
// throw away
}
return count;
}
/**
* Returns an ID in the equivalency group that includes the given
* ID. An equivalency group contains zones that behave
* identically to the given zone.
*
*
The given index must be in the range 0..n-1, where n is the
* value returned by countEquivalentIDs(id). For
* some value of 'index', the returned value will be equal to the
* given id. If the given id is not a valid system time zone, or
* if 'index' is out of range, then returns an empty string.
* @param id a system time zone ID
* @param index a value from 0 to n-1, where n is the value
* returned by countEquivalentIDs(id)
* @return the ID of the index-th zone in the equivalency group
* containing 'id', or an empty string if 'id' is not a valid
* system ID or 'index' is out of range
* @see #countEquivalentIDs
*/
public static synchronized String getEquivalentID(String id, int index) {
String result = "";
int zoneIdx = -1;
if (index >= 0) {
try {
UResourceBundle res = openOlsonResource(null, id);
UResourceBundle links = res.get("links");
int[] zones = links.getIntVector();
if (index < zones.length) {
zoneIdx = zones[index];
}
} catch (MissingResourceException ex) {
// throw away
zoneIdx = -1;
}
}
if (zoneIdx >= 0) {
String tmp = getZoneID(zoneIdx);
if (tmp != null) {
result = tmp;
}
}
return result;
}
private static String[] ZONEIDS = null;
/*
* ICU frequently refers the zone ID array in zoneinfo resource
*/
private static synchronized String[] getZoneIDs() {
if (ZONEIDS == null) {
try {
UResourceBundle top = UResourceBundle.getBundleInstance(
ICUResourceBundle.ICU_BASE_NAME, ZONEINFORESNAME, ICUResourceBundle.ICU_DATA_CLASS_LOADER);
UResourceBundle names = top.get(kNAMES);
ZONEIDS = names.getStringArray();
} catch (MissingResourceException ex) {
// throw away..
}
}
if (ZONEIDS == null) {
ZONEIDS = new String[0];
}
return ZONEIDS;
}
private static String getZoneID(int idx) {
if (idx >= 0) {
String[] ids = getZoneIDs();
if (idx < ids.length) {
return ids[idx];
}
}
return null;
}
private static int getZoneIndex(String zid) {
int zoneIdx = -1;
String[] all = getZoneIDs();
if (all.length > 0) {
int start = 0;
int limit = all.length;
int lastMid = Integer.MAX_VALUE;
for (;;) {
int mid = (start + limit) / 2;
if (lastMid == mid) { /* Have we moved? */
break; /* We haven't moved, and it wasn't found. */
}
lastMid = mid;
int r = zid.compareTo(all[mid]);
if (r == 0) {
zoneIdx = mid;
break;
} else if(r < 0) {
limit = mid;
} else {
start = mid;
}
}
}
return zoneIdx;
}
private static ICUCache CANONICAL_ID_CACHE = new SimpleCache();
private static ICUCache REGION_CACHE = new SimpleCache();
private static ICUCache SINGLE_COUNTRY_CACHE = new SimpleCache();
/**
* Return the canonical id for this system tzid, which might be the id itself.
* If the given system tzid is not know, return null.
*/
public static String getCanonicalSystemID(String tzid) {
String canonical = CANONICAL_ID_CACHE.get(tzid);
if (canonical == null) {
int zoneIdx = getZoneIndex(tzid);
if (zoneIdx >= 0) {
try {
UResourceBundle top = UResourceBundle.getBundleInstance(
ICUResourceBundle.ICU_BASE_NAME, ZONEINFORESNAME, ICUResourceBundle.ICU_DATA_CLASS_LOADER);
UResourceBundle zones = top.get(kZONES);
UResourceBundle zone = zones.get(zoneIdx);
if (zone.getType() == UResourceBundle.INT) {
// resolve link
String tmp = getZoneID(zone.getInt());
if (tmp != null) {
canonical = tmp;
}
} else {
canonical = tzid;
}
// check canonical mapping in CLDR
UResourceBundle keyTypeData = UResourceBundle.getBundleInstance(
ICUResourceBundle.ICU_BASE_NAME, "keyTypeData", ICUResourceBundle.ICU_DATA_CLASS_LOADER);
UResourceBundle typeAlias = keyTypeData.get("typeAlias");
UResourceBundle aliasesForKey = typeAlias.get("timezone");
String cldrCanonical = aliasesForKey.getString(canonical.replace('/', ':'));
if (cldrCanonical != null) {
canonical = cldrCanonical;
}
} catch (MissingResourceException e) {
// fall through
}
}
if (canonical != null) {
CANONICAL_ID_CACHE.put(tzid, canonical);
}
}
return canonical;
}
/**
* Return the canonical country code for this tzid. If we have none, or if the time zone
* is not associated with a country, return null.
*/
public static String getCanonicalCountry(String tzid) {
String region = REGION_CACHE.get(tzid);
if (region == null) {
int zoneIdx = getZoneIndex(tzid);
if (zoneIdx >= 0) {
try {
UResourceBundle top = UResourceBundle.getBundleInstance(
ICUResourceBundle.ICU_BASE_NAME, ZONEINFORESNAME, ICUResourceBundle.ICU_DATA_CLASS_LOADER);
UResourceBundle regions = top.get(kREGIONS);
if (zoneIdx < regions.getSize()) {
region = regions.getString(zoneIdx);
}
} catch (MissingResourceException e) {
// throw away
}
if (region != null) {
REGION_CACHE.put(tzid, region);
}
}
}
if (region.equals("001")) {
return null;
}
return region;
}
/**
* Return the country code if this is a 'single' time zone that can fallback to just
* the country, otherwise return null. (Note, one must also check the locale data
* to see that there is a localization for the country in order to implement
* tr#35 appendix J step 5.)
*/
public static String getSingleCountry(String tzid) {
String country = getCanonicalCountry(tzid);
if (country != null) {
Boolean isSingle = SINGLE_COUNTRY_CACHE.get(tzid);
if (isSingle == null) {
// This is not so efficient
boolean isSingleCountryZone = true;
String[] ids = TimeZone.getAvailableIDs(country);
if (ids.length > 1) {
// Check if there are multiple canonical zones included
String canonical = getCanonicalSystemID(ids[0]);
for (int i = 1; i < ids.length; i++) {
if (!canonical.equals(getCanonicalSystemID(ids[i]))) {
isSingleCountryZone = false;
break;
}
}
}
isSingle = Boolean.valueOf(isSingleCountryZone);
SINGLE_COUNTRY_CACHE.put(tzid, isSingle);
}
if (!isSingle) {
country = null;
}
}
return country;
}
/**
* Returns a time zone location(region) format string defined by UTR#35.
* e.g. "Italy Time", "United States (Los Angeles) Time"
*/
public static String getLocationFormat(String tzid, String city, ULocale locale) {
String country_code = getCanonicalCountry(tzid);
if (country_code == null) {
// no location is associated
return null;
}
String country = null;
try {
ICUResourceBundle rb =
(ICUResourceBundle)UResourceBundle.getBundleInstance(ICUResourceBundle.ICU_REGION_BASE_NAME, locale);
//
// TODO: There is a design bug in UResourceBundle and getLoadingStatus() does not work well.
//
// if (rb.getLoadingStatus() != ICUResourceBundle.FROM_ROOT && rb.getLoadingStatus() != ICUResourceBundle.FROM_DEFAULT) {
// country = ULocale.getDisplayCountry("xx_" + country_code, locale);
// }
// START WORKAROUND
ULocale rbloc = rb.getULocale();
if (!rbloc.equals(ULocale.ROOT) && rbloc.getLanguage().equals(locale.getLanguage())) {
country = ULocale.getDisplayCountry("xx_" + country_code, locale);
}
// END WORKAROUND
} catch (MissingResourceException e) {
// fall through
}
if (country == null || country.length() == 0) {
country = country_code;
}
// This is not behavior specified in tr35, but behavior added by Mark.
// TR35 says to display the country _only_ if there is a localization.
if (getSingleCountry(tzid) != null) { // single country
String regPat = getTZLocalizationInfo(locale, REGION_FORMAT);
if (regPat == null) {
regPat = DEF_REGION_FORMAT;
}
MessageFormat mf = new MessageFormat(regPat);
return mf.format(new Object[] { country });
}
if (city == null) {
city = tzid.substring(tzid.lastIndexOf('/')+1).replace('_',' ');
}
String flbPat = getTZLocalizationInfo(locale, FALLBACK_FORMAT);
if (flbPat == null) {
flbPat = DEF_FALLBACK_FORMAT;
}
MessageFormat mf = new MessageFormat(flbPat);
return mf.format(new Object[] { city, country });
}
private static final String DEF_REGION_FORMAT = "{0}";
private static final String DEF_FALLBACK_FORMAT = "{1} ({0})";
public static final String
HOUR = "hourFormat",
GMT = "gmtFormat",
REGION_FORMAT = "regionFormat",
FALLBACK_FORMAT = "fallbackFormat",
ZONE_STRINGS = "zoneStrings",
FORWARD_SLASH = "/";
/**
* Get the index'd tz datum for this locale. Index must be one of the
* values PREFIX, HOUR, GMT, REGION_FORMAT, FALLBACK_FORMAT
*/
public static String getTZLocalizationInfo(ULocale locale, String format) {
String result = null;
try {
ICUResourceBundle bundle = (ICUResourceBundle) ICUResourceBundle.getBundleInstance(
ICUResourceBundle.ICU_ZONE_BASE_NAME, locale);
result = bundle.getStringWithFallback(ZONE_STRINGS+FORWARD_SLASH+format);
} catch (MissingResourceException e) {
result = null;
}
return result;
}
// private static Set getValidIDs() {
// // Construct list of time zones that are valid, according
// // to the current underlying core JDK. We have to do this
// // at runtime since we don't know what we're running on.
// Set valid = new TreeSet();
// valid.addAll(Arrays.asList(java.util.TimeZone.getAvailableIDs()));
// return valid;
// }
/**
* Given an ID and the top-level resource of the zoneinfo resource,
* open the appropriate resource for the given time zone.
* Dereference links if necessary.
* @param top the top level resource of the zoneinfo resource or null.
* @param id zone id
* @return the corresponding zone resource or null if not found
*/
public static UResourceBundle openOlsonResource(UResourceBundle top, String id)
{
UResourceBundle res = null;
int zoneIdx = getZoneIndex(id);
if (zoneIdx >= 0) {
try {
if (top == null) {
top = UResourceBundle.getBundleInstance(
ICUResourceBundle.ICU_BASE_NAME, ZONEINFORESNAME, ICUResourceBundle.ICU_DATA_CLASS_LOADER);
}
UResourceBundle zones = top.get(kZONES);
UResourceBundle zone = zones.get(zoneIdx);
if (zone.getType() == UResourceBundle.INT) {
// resolve link
zone = zones.get(zone.getInt());
}
res = zone;
} catch (MissingResourceException e) {
res = null;
}
}
return res;
}
private static ICUCache SYSTEM_ZONE_CACHE = new SimpleCache();
/**
* Lookup the given name in our system zone table. If found,
* instantiate a new zone of that name and return it. If not
* found, return 0.
*/
public static TimeZone getSystemTimeZone(String id) {
TimeZone z = SYSTEM_ZONE_CACHE.get(id);
if (z == null) {
try{
UResourceBundle top = UResourceBundle.getBundleInstance(
ICUResourceBundle.ICU_BASE_NAME, ZONEINFORESNAME, ICUResourceBundle.ICU_DATA_CLASS_LOADER);
UResourceBundle res = openOlsonResource(top, id);
z = new OlsonTimeZone(top, res);
z.setID(id);
SYSTEM_ZONE_CACHE.put(id, z);
}catch(Exception ex){
return null;
}
}
return (TimeZone)z.clone();
}
public static TimeZone getGMT(){
TimeZone z = new SimpleTimeZone(0, kGMT_ID);
z.setID(kGMT_ID);
return z;
}
// Maximum value of valid custom time zone hour/min
private static final int kMAX_CUSTOM_HOUR = 23;
private static final int kMAX_CUSTOM_MIN = 59;
private static final int kMAX_CUSTOM_SEC = 59;
/**
* Parse a custom time zone identifier and return a corresponding zone.
* @param id a string of the form GMT[+-]hh:mm, GMT[+-]hhmm, or
* GMT[+-]hh.
* @return a newly created SimpleTimeZone with the given offset and
* no Daylight Savings Time, or null if the id cannot be parsed.
*/
public static TimeZone getCustomTimeZone(String id){
int[] fields = new int[4];
if (parseCustomID(id, fields)) {
String zid = formatCustomID(fields[1], fields[2], fields[3], fields[0] < 0);
int offset = fields[0] * ((fields[1] * 60 + fields[2]) * 60 + fields[3]) * 1000;
return new SimpleTimeZone(offset, zid);
}
return null;
}
/**
* Parse a custom time zone identifier and return the normalized
* custom time zone identifier for the given custom id string.
* @param id a string of the form GMT[+-]hh:mm, GMT[+-]hhmm, or
* GMT[+-]hh.
* @return The normalized custom id string.
*/
public static String getCustomID(String id) {
int[] fields = new int[4];
if (parseCustomID(id, fields)) {
return formatCustomID(fields[1], fields[2], fields[3], fields[0] < 0);
}
return null;
}
/*
* Parses the given custom time zone identifier
* @param id id A string of the form GMT[+-]hh:mm, GMT[+-]hhmm, or
* GMT[+-]hh.
* @param fields An array of int (length = 4) to receive the parsed
* offset time fields. The sign is set to fields[0] (-1 or 1),
* hour is set to fields[1], minute is set to fields[2] and second is
* set to fields[3].
* @return Returns true when the given custom id is valid.
*/
static boolean parseCustomID(String id, int[] fields) {
NumberFormat numberFormat = null;
String idUppercase = id.toUpperCase();
if (id != null && id.length() > kGMT_ID.length() &&
idUppercase.startsWith(kGMT_ID)) {
ParsePosition pos = new ParsePosition(kGMT_ID.length());
int sign = 1;
int hour = 0;
int min = 0;
int sec = 0;
if (id.charAt(pos.getIndex()) == 0x002D /*'-'*/) {
sign = -1;
} else if (id.charAt(pos.getIndex()) != 0x002B /*'+'*/) {
return false;
}
pos.setIndex(pos.getIndex() + 1);
numberFormat = NumberFormat.getInstance();
numberFormat.setParseIntegerOnly(true);
// Look for either hh:mm, hhmm, or hh
int start = pos.getIndex();
Number n = numberFormat.parse(id, pos);
if (pos.getIndex() == start) {
return false;
}
hour = n.intValue();
if (pos.getIndex() < id.length()){
if (pos.getIndex() - start > 2
|| id.charAt(pos.getIndex()) != 0x003A /*':'*/) {
return false;
}
// hh:mm
pos.setIndex(pos.getIndex() + 1);
int oldPos = pos.getIndex();
n = numberFormat.parse(id, pos);
if ((pos.getIndex() - oldPos) != 2) {
// must be 2 digits
return false;
}
min = n.intValue();
if (pos.getIndex() < id.length()) {
if (id.charAt(pos.getIndex()) != 0x003A /*':'*/) {
return false;
}
// [:ss]
pos.setIndex(pos.getIndex() + 1);
oldPos = pos.getIndex();
n = numberFormat.parse(id, pos);
if (pos.getIndex() != id.length()
|| (pos.getIndex() - oldPos) != 2) {
return false;
}
sec = n.intValue();
}
} else {
// Supported formats are below -
//
// HHmmss
// Hmmss
// HHmm
// Hmm
// HH
// H
int length = pos.getIndex() - start;
if (length <= 0 || 6 < length) {
// invalid length
return false;
}
switch (length) {
case 1:
case 2:
// already set to hour
break;
case 3:
case 4:
min = hour % 100;
hour /= 100;
break;
case 5:
case 6:
sec = hour % 100;
min = (hour/100) % 100;
hour /= 10000;
break;
}
}
if (hour <= kMAX_CUSTOM_HOUR && min <= kMAX_CUSTOM_MIN && sec <= kMAX_CUSTOM_SEC) {
if (fields != null) {
if (fields.length >= 1) {
fields[0] = sign;
}
if (fields.length >= 2) {
fields[1] = hour;
}
if (fields.length >= 3) {
fields[2] = min;
}
if (fields.length >= 4) {
fields[3] = sec;
}
}
return true;
}
}
return false;
}
/**
* Creates a custom zone for the offset
* @param offset GMT offset in milliseconds
* @return A custom TimeZone for the offset with normalized time zone id
*/
public static TimeZone getCustomTimeZone(int offset) {
boolean negative = false;
int tmp = offset;
if (offset < 0) {
negative = true;
tmp = -offset;
}
int hour, min, sec, millis;
millis = tmp % 1000;
if (ASSERT) {
Assert.assrt("millis!=0", millis != 0);
}
tmp /= 1000;
sec = tmp % 60;
tmp /= 60;
min = tmp % 60;
hour = tmp / 60;
// Note: No millisecond part included in TZID for now
String zid = formatCustomID(hour, min, sec, negative);
return new SimpleTimeZone(offset, zid);
}
/*
* Returns the normalized custom TimeZone ID
*/
static String formatCustomID(int hour, int min, int sec, boolean negative) {
// Create normalized time zone ID - GMT[+|-]hh:mm[:ss]
StringBuilder zid = new StringBuilder(kCUSTOM_TZ_PREFIX);
if (hour != 0 || min != 0) {
if(negative) {
zid.append('-');
} else {
zid.append('+');
}
// Always use US-ASCII digits
if (hour < 10) {
zid.append('0');
}
zid.append(hour);
zid.append(':');
if (min < 10) {
zid.append('0');
}
zid.append(min);
if (sec != 0) {
// Optional second field
zid.append(':');
if (sec < 10) {
zid.append('0');
}
zid.append(sec);
}
}
return zid.toString();
}
/**
* Returns a CLDR metazone ID for the given Olson tzid and time.
*/
public static String getMetazoneID(String olsonID, long date) {
String mzid = null;
List mappings = getOlsonToMatazones(olsonID);
if (mappings != null) {
for (int i = 0; i < mappings.size(); i++) {
OlsonToMetaMappingEntry mzm = mappings.get(i);
if (date >= mzm.from && date < mzm.to) {
mzid = mzm.mzid;
break;
}
}
}
return mzid;
}
private static ICUCache> OLSON_TO_META_CACHE =
new SimpleCache>();
static class OlsonToMetaMappingEntry {
String mzid;
long from;
long to;
}
static List getOlsonToMatazones(String tzid) {
List mzMappings = OLSON_TO_META_CACHE.get(tzid);
if (mzMappings == null) {
try {
UResourceBundle bundle = UResourceBundle.getBundleInstance(ICUResourceBundle.ICU_BASE_NAME, "metaZones");
UResourceBundle metazoneInfoBundle = bundle.get("metazoneInfo");
String canonicalID = TimeZone.getCanonicalID(tzid);
if (canonicalID == null) {
return null;
}
String tzkey = canonicalID.replace('/', ':');
UResourceBundle zoneBundle = metazoneInfoBundle.get(tzkey);
mzMappings = new LinkedList();
for (int idx = 0; idx < zoneBundle.getSize(); idx++) {
UResourceBundle mz = zoneBundle.get(idx);
String mzid = mz.getString(0);
String from = "1970-01-01 00:00";
String to = "9999-12-31 23:59";
if (mz.getSize() == 3) {
from = mz.getString(1);
to = mz.getString(2);
}
OlsonToMetaMappingEntry mzmap = new OlsonToMetaMappingEntry();
mzmap.mzid = mzid.intern();
try {
mzmap.from = parseDate(from);
mzmap.to = parseDate(to);
} catch (IllegalArgumentException baddate) {
// skip this
continue;
}
// Add this mapping to the list
mzMappings.add(mzmap);
}
} catch (MissingResourceException mre) {
// fall through
}
if (mzMappings != null) {
OLSON_TO_META_CACHE.put(tzid, mzMappings);
}
}
return mzMappings;
}
/*
* Convert a date string used by metazone mappings to long.
* The format used by CLDR metazone mapping is "yyyy-MM-dd HH:mm".
* We do not want to use SimpleDateFormat to parse the metazone
* mapping range strings in createOlsonToMeta, because it might be
* called from SimpleDateFormat initialization code.
*/
static long parseDate (String text) throws IllegalArgumentException {
int year = 0, month = 0, day = 0, hour = 0, min = 0;
int idx;
int n;
// "yyyy" (0 - 3)
for (idx = 0; idx <= 3; idx++) {
n = text.charAt(idx) - '0';
if (n >= 0 && n < 10) {
year = 10*year + n;
} else {
throw new IllegalArgumentException("Bad year");
}
}
// "MM" (5 - 6)
for (idx = 5; idx <= 6; idx++) {
n = text.charAt(idx) - '0';
if (n >= 0 && n < 10) {
month = 10*month + n;
} else {
throw new IllegalArgumentException("Bad month");
}
}
// "dd" (8 - 9)
for (idx = 8; idx <= 9; idx++) {
n = text.charAt(idx) - '0';
if (n >= 0 && n < 10) {
day = 10*day + n;
} else {
throw new IllegalArgumentException("Bad day");
}
}
// "HH" (11 - 12)
for (idx = 11; idx <= 12; idx++) {
n = text.charAt(idx) - '0';
if (n >= 0 && n < 10) {
hour = 10*hour + n;
} else {
throw new IllegalArgumentException("Bad hour");
}
}
// "mm" (14 - 15)
for (idx = 14; idx <= 15; idx++) {
n = text.charAt(idx) - '0';
if (n >= 0 && n < 10) {
min = 10*min + n;
} else {
throw new IllegalArgumentException("Bad minute");
}
}
long date = Grego.fieldsToDay(year, month - 1, day) * Grego.MILLIS_PER_DAY
+ hour * Grego.MILLIS_PER_HOUR + min * Grego.MILLIS_PER_MINUTE;
return date;
}
private static ICUCache> META_TO_OLSON_CACHE =
new SimpleCache>();
/**
* Returns an Olson ID for the ginve metazone and region
*/
public static String getZoneIdByMetazone(String metazoneID, String region) {
String tzid = null;
// look up in the cache first
Map zoneMap = META_TO_OLSON_CACHE.get(metazoneID);
if (zoneMap == null) {
try {
// Create zone mappings for the metazone
UResourceBundle bundle = UResourceBundle.getBundleInstance(ICUResourceBundle.ICU_BASE_NAME, "metaZones");
UResourceBundle mapTimezones = bundle.get("mapTimezones");
UResourceBundle territoryMap = mapTimezones.get(metazoneID);
zoneMap = new HashMap();
Set territories = territoryMap.keySet();
for (String territory : territories) {
String zone = territoryMap.getString(territory);
zoneMap.put(territory, zone);
}
// cache this
META_TO_OLSON_CACHE.put(metazoneID, zoneMap);
} catch (MissingResourceException e) {
// ignore
}
}
if (zoneMap != null) {
tzid = zoneMap.get(region);
if (tzid == null) {
tzid = zoneMap.get("001"); // use the mapping for world as fallback
}
}
return tzid;
}
}