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With inspiration from other libraries
// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html#License
/*
*******************************************************************************
* Copyright (C) 2011-2016, International Business Machines Corporation and
* others. All Rights Reserved.
*******************************************************************************
*/
package com.ibm.icu.impl;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.regex.Pattern;
import com.ibm.icu.impl.TextTrieMap.ResultHandler;
import com.ibm.icu.text.TimeZoneNames;
import com.ibm.icu.util.TimeZone;
import com.ibm.icu.util.TimeZone.SystemTimeZoneType;
import com.ibm.icu.util.ULocale;
import com.ibm.icu.util.UResourceBundle;
/**
* The standard ICU implementation of TimeZoneNames
*/
public class TimeZoneNamesImpl extends TimeZoneNames {
private static final long serialVersionUID = -2179814848495897472L;
private static final String ZONE_STRINGS_BUNDLE = "zoneStrings";
private static final String MZ_PREFIX = "meta:";
private static volatile Set METAZONE_IDS;
private static final TZ2MZsCache TZ_TO_MZS_CACHE = new TZ2MZsCache();
private static final MZ2TZsCache MZ_TO_TZS_CACHE = new MZ2TZsCache();
private transient ICUResourceBundle _zoneStrings;
// These are hard cache. We create only one TimeZoneNamesImpl per locale
// and it's stored in SoftCache, so we do not need to worry about the
// footprint much.
private transient ConcurrentHashMap _mzNamesMap;
private transient ConcurrentHashMap _tzNamesMap;
private transient boolean _namesFullyLoaded;
private transient TextTrieMap _namesTrie;
private transient boolean _namesTrieFullyLoaded;
public TimeZoneNamesImpl(ULocale locale) {
initialize(locale);
}
/* (non-Javadoc)
* @see com.ibm.icu.text.TimeZoneNames#getAvailableMetaZoneIDs()
*/
@Override
public Set getAvailableMetaZoneIDs() {
return _getAvailableMetaZoneIDs();
}
static Set _getAvailableMetaZoneIDs() {
if (METAZONE_IDS == null) {
synchronized (TimeZoneNamesImpl.class) {
if (METAZONE_IDS == null) {
UResourceBundle bundle = UResourceBundle.getBundleInstance(ICUData.ICU_BASE_NAME, "metaZones");
UResourceBundle mapTimezones = bundle.get("mapTimezones");
Set keys = mapTimezones.keySet();
METAZONE_IDS = Collections.unmodifiableSet(keys);
}
}
}
return METAZONE_IDS;
}
/* (non-Javadoc)
* @see com.ibm.icu.text.TimeZoneNames#getAvailableMetaZoneIDs(java.lang.String)
*/
@Override
public Set getAvailableMetaZoneIDs(String tzID) {
return _getAvailableMetaZoneIDs(tzID);
}
static Set _getAvailableMetaZoneIDs(String tzID) {
if (tzID == null || tzID.length() == 0) {
return Collections.emptySet();
}
List maps = TZ_TO_MZS_CACHE.getInstance(tzID, tzID);
if (maps.isEmpty()) {
return Collections.emptySet();
}
Set mzIDs = new HashSet(maps.size());
for (MZMapEntry map : maps) {
mzIDs.add(map.mzID());
}
// make it unmodifiable because of the API contract. We may cache the results in futre.
return Collections.unmodifiableSet(mzIDs);
}
/* (non-Javadoc)
* @see com.ibm.icu.text.TimeZoneNames#getMetaZoneID(java.lang.String, long)
*/
@Override
public String getMetaZoneID(String tzID, long date) {
return _getMetaZoneID(tzID, date);
}
static String _getMetaZoneID(String tzID, long date) {
if (tzID == null || tzID.length() == 0) {
return null;
}
String mzID = null;
List maps = TZ_TO_MZS_CACHE.getInstance(tzID, tzID);
for (MZMapEntry map : maps) {
if (date >= map.from() && date < map.to()) {
mzID = map.mzID();
break;
}
}
return mzID;
}
/* (non-Javadoc)
* @see com.ibm.icu.text.TimeZoneNames#getReferenceZoneID(java.lang.String, java.lang.String)
*/
@Override
public String getReferenceZoneID(String mzID, String region) {
return _getReferenceZoneID(mzID, region);
}
static String _getReferenceZoneID(String mzID, String region) {
if (mzID == null || mzID.length() == 0) {
return null;
}
String refID = null;
Map regionTzMap = MZ_TO_TZS_CACHE.getInstance(mzID, mzID);
if (!regionTzMap.isEmpty()) {
refID = regionTzMap.get(region);
if (refID == null) {
refID = regionTzMap.get("001");
}
}
return refID;
}
/*
* (non-Javadoc)
* @see com.ibm.icu.text.TimeZoneNames#getMetaZoneDisplayName(java.lang.String, com.ibm.icu.text.TimeZoneNames.NameType)
*/
@Override
public String getMetaZoneDisplayName(String mzID, NameType type) {
if (mzID == null || mzID.length() == 0) {
return null;
}
return loadMetaZoneNames(mzID).getName(type);
}
/*
* (non-Javadoc)
* @see com.ibm.icu.text.TimeZoneNames#getTimeZoneDisplayName(java.lang.String, com.ibm.icu.text.TimeZoneNames.NameType)
*/
@Override
public String getTimeZoneDisplayName(String tzID, NameType type) {
if (tzID == null || tzID.length() == 0) {
return null;
}
return loadTimeZoneNames(tzID).getName(type);
}
/* (non-Javadoc)
* @see com.ibm.icu.text.TimeZoneNames#getExemplarLocationName(java.lang.String)
*/
@Override
public String getExemplarLocationName(String tzID) {
if (tzID == null || tzID.length() == 0) {
return null;
}
String locName = loadTimeZoneNames(tzID).getName(NameType.EXEMPLAR_LOCATION);
return locName;
}
/* (non-Javadoc)
* @see com.ibm.icu.text.TimeZoneNames#find(java.lang.CharSequence, int, java.util.Set)
*/
@Override
public synchronized Collection find(CharSequence text, int start, EnumSet nameTypes) {
if (text == null || text.length() == 0 || start < 0 || start >= text.length()) {
throw new IllegalArgumentException("bad input text or range");
}
NameSearchHandler handler = new NameSearchHandler(nameTypes);
Collection matches;
// First try of lookup.
matches = doFind(handler, text, start);
if (matches != null) {
return matches;
}
// All names are not yet loaded into the trie.
// We may have loaded names for formatting several time zones,
// and might be parsing one of those.
// Populate the parsing trie from all of the already-loaded names.
addAllNamesIntoTrie();
// Second try of lookup.
matches = doFind(handler, text, start);
if (matches != null) {
return matches;
}
// There are still some names we haven't loaded into the trie yet.
// Load everything now.
internalLoadAllDisplayNames();
// Set default time zone location names
// for time zones without explicit display names.
// TODO: Should this logic be moved into internalLoadAllDisplayNames?
Set tzIDs = TimeZone.getAvailableIDs(SystemTimeZoneType.CANONICAL, null, null);
for (String tzID : tzIDs) {
if (!_tzNamesMap.containsKey(tzID)) {
ZNames.createTimeZoneAndPutInCache(_tzNamesMap, null, tzID);
}
}
addAllNamesIntoTrie();
_namesTrieFullyLoaded = true;
// Third try: we must return this one.
return doFind(handler, text, start);
}
private Collection doFind(NameSearchHandler handler, CharSequence text, int start) {
handler.resetResults();
_namesTrie.find(text, start, handler);
if (handler.getMaxMatchLen() == (text.length() - start) || _namesTrieFullyLoaded) {
return handler.getMatches();
}
return null;
}
@Override
public synchronized void loadAllDisplayNames() {
internalLoadAllDisplayNames();
}
@Override
public void getDisplayNames(String tzID, NameType[] types, long date,
String[] dest, int destOffset) {
if (tzID == null || tzID.length() == 0) {
return;
}
ZNames tzNames = loadTimeZoneNames(tzID);
ZNames mzNames = null;
for (int i = 0; i < types.length; ++i) {
NameType type = types[i];
String name = tzNames.getName(type);
if (name == null) {
if (mzNames == null) {
String mzID = getMetaZoneID(tzID, date);
if (mzID == null || mzID.length() == 0) {
mzNames = ZNames.EMPTY_ZNAMES;
} else {
mzNames = loadMetaZoneNames(mzID);
}
}
name = mzNames.getName(type);
}
dest[destOffset + i] = name;
}
}
/** Caller must synchronize. */
private void internalLoadAllDisplayNames() {
if (!_namesFullyLoaded) {
_namesFullyLoaded = true;
new ZoneStringsLoader().load();
}
}
/** Caller must synchronize. */
private void addAllNamesIntoTrie() {
for (Map.Entry entry : _tzNamesMap.entrySet()) {
entry.getValue().addAsTimeZoneIntoTrie(entry.getKey(), _namesTrie);
}
for (Map.Entry entry : _mzNamesMap.entrySet()) {
entry.getValue().addAsMetaZoneIntoTrie(entry.getKey(), _namesTrie);
}
}
/**
* Loads all meta zone and time zone names for this TimeZoneNames' locale.
*/
private final class ZoneStringsLoader extends UResource.Sink {
/**
* Prepare for several hundred time zones and meta zones.
* _zoneStrings.getSize() is ineffective in a sparsely populated locale like en-GB.
*/
private static final int INITIAL_NUM_ZONES = 300;
private HashMap keyToLoader =
new HashMap(INITIAL_NUM_ZONES);
private StringBuilder sb = new StringBuilder(32);
/** Caller must synchronize. */
void load() {
_zoneStrings.getAllItemsWithFallback("", this);
for (Map.Entry entry : keyToLoader.entrySet()) {
ZNamesLoader loader = entry.getValue();
if (loader == ZNamesLoader.DUMMY_LOADER) { continue; }
UResource.Key key = entry.getKey();
if (isMetaZone(key)) {
String mzID = mzIDFromKey(key);
ZNames.createMetaZoneAndPutInCache(_mzNamesMap, loader.getNames(), mzID);
} else {
String tzID = tzIDFromKey(key);
ZNames.createTimeZoneAndPutInCache(_tzNamesMap, loader.getNames(), tzID);
}
}
}
@Override
public void put(UResource.Key key, UResource.Value value, boolean noFallback) {
UResource.Table timeZonesTable = value.getTable();
for (int j = 0; timeZonesTable.getKeyAndValue(j, key, value); ++j) {
assert !value.isNoInheritanceMarker();
if (value.getType() == UResourceBundle.TABLE) {
consumeNamesTable(key, value, noFallback);
} else {
// Ignore fields that aren't tables (e.g., fallbackFormat and regionFormatStandard).
// All time zone fields are tables.
}
}
}
private void consumeNamesTable(UResource.Key key, UResource.Value value, boolean noFallback) {
ZNamesLoader loader = keyToLoader.get(key);
if (loader == null) {
if (isMetaZone(key)) {
String mzID = mzIDFromKey(key);
if (_mzNamesMap.containsKey(mzID)) {
// We have already loaded the names for this meta zone.
loader = ZNamesLoader.DUMMY_LOADER;
} else {
loader = new ZNamesLoader();
}
} else {
String tzID = tzIDFromKey(key);
if (_tzNamesMap.containsKey(tzID)) {
// We have already loaded the names for this time zone.
loader = ZNamesLoader.DUMMY_LOADER;
} else {
loader = new ZNamesLoader();
}
}
UResource.Key newKey = createKey(key);
keyToLoader.put(newKey, loader);
}
if (loader != ZNamesLoader.DUMMY_LOADER) {
// Let the ZNamesLoader consume the names table.
loader.put(key, value, noFallback);
}
}
UResource.Key createKey(UResource.Key key) {
return key.clone();
}
boolean isMetaZone(UResource.Key key) {
return key.startsWith(MZ_PREFIX);
}
/**
* Equivalent to key.substring(MZ_PREFIX.length())
* except reuses our StringBuilder.
*/
private String mzIDFromKey(UResource.Key key) {
sb.setLength(0);
for (int i = MZ_PREFIX.length(); i < key.length(); ++i) {
sb.append(key.charAt(i));
}
return sb.toString();
}
private String tzIDFromKey(UResource.Key key) {
sb.setLength(0);
for (int i = 0; i < key.length(); ++i) {
char c = key.charAt(i);
if (c == ':') {
c = '/';
}
sb.append(c);
}
return sb.toString();
}
}
/**
* Initialize the transient fields, called from the constructor and
* readObject.
*
* @param locale The locale
*/
private void initialize(ULocale locale) {
ICUResourceBundle bundle = (ICUResourceBundle)ICUResourceBundle.getBundleInstance(
ICUData.ICU_ZONE_BASE_NAME, locale);
_zoneStrings = (ICUResourceBundle)bundle.get(ZONE_STRINGS_BUNDLE);
// TODO: Access is synchronized, can we use a non-concurrent map?
_tzNamesMap = new ConcurrentHashMap();
_mzNamesMap = new ConcurrentHashMap();
_namesFullyLoaded = false;
_namesTrie = new TextTrieMap(true);
_namesTrieFullyLoaded = false;
// Preload zone strings for the default time zone
TimeZone tz = TimeZone.getDefault();
String tzCanonicalID = ZoneMeta.getCanonicalCLDRID(tz);
if (tzCanonicalID != null) {
loadStrings(tzCanonicalID);
}
}
/**
* Load all strings used by the specified time zone.
* This is called from the initializer to load default zone's
* strings.
* @param tzCanonicalID the canonical time zone ID
*/
private synchronized void loadStrings(String tzCanonicalID) {
if (tzCanonicalID == null || tzCanonicalID.length() == 0) {
return;
}
loadTimeZoneNames(tzCanonicalID);
Set mzIDs = getAvailableMetaZoneIDs(tzCanonicalID);
for (String mzID : mzIDs) {
loadMetaZoneNames(mzID);
}
}
/*
* The custom serialization method.
* This implementation only preserve locale object used for the names.
*/
private void writeObject(ObjectOutputStream out) throws IOException {
ULocale locale = _zoneStrings.getULocale();
out.writeObject(locale);
}
/*
* The custom deserialization method.
* This implementation only read locale object used by the object.
*/
private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
ULocale locale = (ULocale)in.readObject();
initialize(locale);
}
/**
* Returns a set of names for the given meta zone ID. This method loads
* the set of names into the internal map and trie for future references.
* @param mzID the meta zone ID
* @return An instance of ZNames that includes a set of meta zone display names.
*/
private synchronized ZNames loadMetaZoneNames(String mzID) {
ZNames mznames = _mzNamesMap.get(mzID);
if (mznames == null) {
ZNamesLoader loader = new ZNamesLoader();
loader.loadMetaZone(_zoneStrings, mzID);
mznames = ZNames.createMetaZoneAndPutInCache(_mzNamesMap, loader.getNames(), mzID);
}
return mznames;
}
/**
* Returns a set of names for the given time zone ID. This method loads
* the set of names into the internal map and trie for future references.
* @param tzID the canonical time zone ID
* @return An instance of ZNames that includes a set of time zone display names.
*/
private synchronized ZNames loadTimeZoneNames(String tzID) {
ZNames tznames = _tzNamesMap.get(tzID);
if (tznames == null) {
ZNamesLoader loader = new ZNamesLoader();
loader.loadTimeZone(_zoneStrings, tzID);
tznames = ZNames.createTimeZoneAndPutInCache(_tzNamesMap, loader.getNames(), tzID);
}
return tznames;
}
/**
* An instance of NameInfo is stored in the zone names trie.
*/
private static class NameInfo {
String tzID;
String mzID;
NameType type;
}
/**
* NameSearchHandler is used for collecting name matches.
*/
private static class NameSearchHandler implements ResultHandler {
private EnumSet _nameTypes;
private Collection _matches;
private int _maxMatchLen;
NameSearchHandler(EnumSet nameTypes) {
_nameTypes = nameTypes;
}
/* (non-Javadoc)
* @see com.ibm.icu.impl.TextTrieMap.ResultHandler#handlePrefixMatch(int, java.util.Iterator)
*/
@Override
public boolean handlePrefixMatch(int matchLength, Iterator values) {
while (values.hasNext()) {
NameInfo ninfo = values.next();
if (_nameTypes != null && !_nameTypes.contains(ninfo.type)) {
continue;
}
MatchInfo minfo;
if (ninfo.tzID != null) {
minfo = new MatchInfo(ninfo.type, ninfo.tzID, null, matchLength);
} else {
assert(ninfo.mzID != null);
minfo = new MatchInfo(ninfo.type, null, ninfo.mzID, matchLength);
}
if (_matches == null) {
_matches = new LinkedList();
}
_matches.add(minfo);
if (matchLength > _maxMatchLen) {
_maxMatchLen = matchLength;
}
}
return true;
}
/**
* Returns the match results
* @return the match results
*/
public Collection getMatches() {
if (_matches == null) {
return Collections.emptyList();
}
return _matches;
}
/**
* Returns the maximum match length, or 0 if no match was found
* @return the maximum match length
*/
public int getMaxMatchLen() {
return _maxMatchLen;
}
/**
* Resets the match results
*/
public void resetResults() {
_matches = null;
_maxMatchLen = 0;
}
}
private static final class ZNamesLoader extends UResource.Sink {
private String[] names;
/**
* Does not load any names, for no-fallback handling.
*/
private static ZNamesLoader DUMMY_LOADER = new ZNamesLoader();
void loadMetaZone(ICUResourceBundle zoneStrings, String mzID) {
String key = MZ_PREFIX + mzID;
loadNames(zoneStrings, key);
}
void loadTimeZone(ICUResourceBundle zoneStrings, String tzID) {
String key = tzID.replace('/', ':');
loadNames(zoneStrings, key);
}
void loadNames(ICUResourceBundle zoneStrings, String key) {
assert zoneStrings != null;
assert key != null;
assert key.length() > 0;
// Reset names so that this instance can be used to load data multiple times.
names = null;
try {
zoneStrings.getAllItemsWithFallback(key, this);
} catch (MissingResourceException e) {
}
}
private static ZNames.NameTypeIndex nameTypeIndexFromKey(UResource.Key key) {
// Avoid key.toString() object creation.
if (key.length() != 2) {
return null;
}
char c0 = key.charAt(0);
char c1 = key.charAt(1);
if (c0 == 'l') {
return c1 == 'g' ? ZNames.NameTypeIndex.LONG_GENERIC :
c1 == 's' ? ZNames.NameTypeIndex.LONG_STANDARD :
c1 == 'd' ? ZNames.NameTypeIndex.LONG_DAYLIGHT : null;
} else if (c0 == 's') {
return c1 == 'g' ? ZNames.NameTypeIndex.SHORT_GENERIC :
c1 == 's' ? ZNames.NameTypeIndex.SHORT_STANDARD :
c1 == 'd' ? ZNames.NameTypeIndex.SHORT_DAYLIGHT : null;
} else if (c0 == 'e' && c1 == 'c') {
return ZNames.NameTypeIndex.EXEMPLAR_LOCATION;
}
return null;
}
private void setNameIfEmpty(UResource.Key key, UResource.Value value) {
if (names == null) {
names = new String[ZNames.NUM_NAME_TYPES];
}
ZNames.NameTypeIndex index = nameTypeIndexFromKey(key);
if (index == null) { return; }
assert index.ordinal() < ZNames.NUM_NAME_TYPES;
if (names[index.ordinal()] == null) {
names[index.ordinal()] = value.getString();
}
}
@Override
public void put(UResource.Key key, UResource.Value value, boolean noFallback) {
UResource.Table namesTable = value.getTable();
for (int i = 0; namesTable.getKeyAndValue(i, key, value); ++i) {
assert value.getType() == UResourceBundle.STRING;
setNameIfEmpty(key, value); // could be value.isNoInheritanceMarker()
}
}
private String[] getNames() {
if (Utility.sameObjects(names, null)) {
return null;
}
int length = 0;
for (int i = 0; i < ZNames.NUM_NAME_TYPES; ++i) {
String name = names[i];
if (name != null) {
if (name.equals(ICUResourceBundle.NO_INHERITANCE_MARKER)) {
names[i] = null;
} else {
length = i + 1;
}
}
}
String[] result;
if (length == ZNames.NUM_NAME_TYPES) {
// Return the full array if the last name is set.
result = names;
} else if (length == 0) {
// Return null instead of a zero-length array.
result = null;
} else {
// Return a shorter array for permanent storage.
// Copy all names into the minimal array.
result = Arrays.copyOfRange(names, 0, length);
}
return result;
}
}
/**
* This class stores name data for a meta zone or time zone.
*/
private static class ZNames {
/**
* Private enum corresponding to the public TimeZoneNames::NameType for the order in
* which fields are stored in a ZNames instance. EXEMPLAR_LOCATION is stored first
* for efficiency.
*/
private static enum NameTypeIndex {
EXEMPLAR_LOCATION, LONG_GENERIC, LONG_STANDARD, LONG_DAYLIGHT, SHORT_GENERIC, SHORT_STANDARD, SHORT_DAYLIGHT;
static final NameTypeIndex values[] = values();
};
public static final int NUM_NAME_TYPES = 7;
private static int getNameTypeIndex(NameType type) {
switch (type) {
case EXEMPLAR_LOCATION:
return NameTypeIndex.EXEMPLAR_LOCATION.ordinal();
case LONG_GENERIC:
return NameTypeIndex.LONG_GENERIC.ordinal();
case LONG_STANDARD:
return NameTypeIndex.LONG_STANDARD.ordinal();
case LONG_DAYLIGHT:
return NameTypeIndex.LONG_DAYLIGHT.ordinal();
case SHORT_GENERIC:
return NameTypeIndex.SHORT_GENERIC.ordinal();
case SHORT_STANDARD:
return NameTypeIndex.SHORT_STANDARD.ordinal();
case SHORT_DAYLIGHT:
return NameTypeIndex.SHORT_DAYLIGHT.ordinal();
default:
throw new AssertionError("No NameTypeIndex match for " + type);
}
}
private static NameType getNameType(int index) {
switch (NameTypeIndex.values[index]) {
case EXEMPLAR_LOCATION:
return NameType.EXEMPLAR_LOCATION;
case LONG_GENERIC:
return NameType.LONG_GENERIC;
case LONG_STANDARD:
return NameType.LONG_STANDARD;
case LONG_DAYLIGHT:
return NameType.LONG_DAYLIGHT;
case SHORT_GENERIC:
return NameType.SHORT_GENERIC;
case SHORT_STANDARD:
return NameType.SHORT_STANDARD;
case SHORT_DAYLIGHT:
return NameType.SHORT_DAYLIGHT;
default:
throw new AssertionError("No NameType match for " + index);
}
}
static final ZNames EMPTY_ZNAMES = new ZNames(null);
// A meta zone names instance never has an exemplar location string.
private static final int EX_LOC_INDEX = NameTypeIndex.EXEMPLAR_LOCATION.ordinal();
private String[] _names;
private boolean didAddIntoTrie;
protected ZNames(String[] names) {
_names = names;
didAddIntoTrie = names == null;
}
public static ZNames createMetaZoneAndPutInCache(Map cache,
String[] names, String mzID) {
String key = mzID.intern();
ZNames value;
if (names == null) {
value = EMPTY_ZNAMES;
} else {
value = new ZNames(names);
}
cache.put(key, value);
return value;
}
public static ZNames createTimeZoneAndPutInCache(Map cache,
String[] names, String tzID) {
// For time zones, check that the exemplar city name is populated. If necessary, use
// "getDefaultExemplarLocationName" to extract it from the time zone name.
names = (names == null) ? new String[EX_LOC_INDEX + 1] : names;
if (names[EX_LOC_INDEX] == null) {
names[EX_LOC_INDEX] = getDefaultExemplarLocationName(tzID);
}
String key = tzID.intern();
ZNames value = new ZNames(names);
cache.put(key, value);
return value;
}
public String getName(NameType type) {
int index = getNameTypeIndex(type);
if (_names != null && index < _names.length) {
return _names[index];
} else {
return null;
}
}
public void addAsMetaZoneIntoTrie(String mzID, TextTrieMap trie) {
addNamesIntoTrie(mzID, null, trie);
}
public void addAsTimeZoneIntoTrie(String tzID, TextTrieMap trie) {
addNamesIntoTrie(null, tzID, trie);
}
private void addNamesIntoTrie(String mzID, String tzID, TextTrieMap trie) {
if (_names == null || didAddIntoTrie) {
return;
}
didAddIntoTrie = true;
for (int i = 0; i < _names.length; ++i) {
String name = _names[i];
if (name != null) {
NameInfo info = new NameInfo();
info.mzID = mzID;
info.tzID = tzID;
info.type = getNameType(i);
trie.put(name, info);
}
}
}
}
//
// Canonical time zone ID -> meta zone ID
//
private static class MZMapEntry {
private String _mzID;
private long _from;
private long _to;
MZMapEntry(String mzID, long from, long to) {
_mzID = mzID;
_from = from;
_to = to;
}
String mzID() {
return _mzID;
}
long from() {
return _from;
}
long to() {
return _to;
}
}
private static class TZ2MZsCache extends SoftCache, String> {
/* (non-Javadoc)
* @see com.ibm.icu.impl.CacheBase#createInstance(java.lang.Object, java.lang.Object)
*/
@Override
protected List createInstance(String key, String data) {
List mzMaps = null;
UResourceBundle bundle = UResourceBundle.getBundleInstance(ICUData.ICU_BASE_NAME, "metaZones");
UResourceBundle metazoneInfoBundle = bundle.get("metazoneInfo");
String tzkey = data.replace('/', ':');
try {
UResourceBundle zoneBundle = metazoneInfoBundle.get(tzkey);
mzMaps = new ArrayList(zoneBundle.getSize());
for (int idx = 0; idx < zoneBundle.getSize(); idx++) {
UResourceBundle mz = zoneBundle.get(idx);
String mzid = mz.getString(0);
String fromStr = "1970-01-01 00:00";
String toStr = "9999-12-31 23:59";
if (mz.getSize() == 3) {
fromStr = mz.getString(1);
toStr = mz.getString(2);
}
long from, to;
from = parseDate(fromStr);
to = parseDate(toStr);
mzMaps.add(new MZMapEntry(mzid, from, to));
}
} catch (MissingResourceException mre) {
mzMaps = Collections.emptyList();
}
return mzMaps;
}
/**
* Private static method parsing the date text used by meta zone to
* time zone mapping data in locale resource.
*
* @param text the UTC date text in the format of "yyyy-MM-dd HH:mm",
* for example - "1970-01-01 00:00"
* @return the date
*/
private static long parseDate (String text) {
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
+ (long)hour * Grego.MILLIS_PER_HOUR + (long)min * Grego.MILLIS_PER_MINUTE;
return date;
}
}
//
// Meta zone ID -> time zone ID
//
private static class MZ2TZsCache extends SoftCache, String> {
/* (non-Javadoc)
* @see com.ibm.icu.impl.CacheBase#createInstance(java.lang.Object, java.lang.Object)
*/
@Override
protected Map createInstance(String key, String data) {
Map map = null;
UResourceBundle bundle = UResourceBundle.getBundleInstance(ICUData.ICU_BASE_NAME, "metaZones");
UResourceBundle mapTimezones = bundle.get("mapTimezones");
try {
UResourceBundle regionMap = mapTimezones.get(key);
Set regions = regionMap.keySet();
map = new HashMap(regions.size());
for (String region : regions) {
String tzID = regionMap.getString(region).intern();
map.put(region.intern(), tzID);
}
} catch (MissingResourceException e) {
map = Collections.emptyMap();
}
return map;
}
}
private static final Pattern LOC_EXCLUSION_PATTERN = Pattern.compile("Etc/.*|SystemV/.*|.*/Riyadh8[7-9]");
/**
* Default exemplar location name based on time zone ID.
* For example, "America/New_York" -> "New York"
* @param tzID the time zone ID
* @return the exemplar location name or null if location is not available.
*/
public static String getDefaultExemplarLocationName(String tzID) {
if (tzID == null || tzID.length() == 0 || LOC_EXCLUSION_PATTERN.matcher(tzID).matches()) {
return null;
}
String location = null;
int sep = tzID.lastIndexOf('/');
if (sep > 0 && sep + 1 < tzID.length()) {
location = tzID.substring(sep + 1).replace('_', ' ');
}
return location;
}
}