com.facebook.presto.jdbc.internal.joda.time.tz.DefaultNameProvider Maven / Gradle / Ivy
/*
* Copyright 2001-2011 Stephen Colebourne
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.facebook.presto.jdbc.internal.joda.time.tz;
import java.text.DateFormatSymbols;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import com.facebook.presto.jdbc.internal.joda.time.DateTimeUtils;
/**
* The default name provider acquires localized names from
* {@link DateFormatSymbols java.text.DateFormatSymbols}.
*
* DefaultNameProvider is thread-safe and immutable.
*
* @author Brian S O'Neill
* @since 1.0
*/
@SuppressWarnings("unchecked")
public class DefaultNameProvider implements NameProvider {
// locale -> (id -> (nameKey -> [shortName, name]))
private HashMap>> iByLocaleCache = createCache();
private HashMap>> iByLocaleCache2 = createCache();
public DefaultNameProvider() {
}
//-----------------------------------------------------------------------
// retained original code for name lookup, not used in normal code
// this code could be refactored to avoid duplication, but leaving it as is ensures backward compatibility
public String getShortName(Locale locale, String id, String nameKey) {
String[] nameSet = getNameSet(locale, id, nameKey);
return nameSet == null ? null : nameSet[0];
}
public String getName(Locale locale, String id, String nameKey) {
String[] nameSet = getNameSet(locale, id, nameKey);
return nameSet == null ? null : nameSet[1];
}
private synchronized String[] getNameSet(Locale locale, String id, String nameKey) {
if (locale == null || id == null || nameKey == null) {
return null;
}
Map> byIdCache = iByLocaleCache.get(locale);
if (byIdCache == null) {
iByLocaleCache.put(locale, byIdCache = createCache());
}
Map byNameKeyCache = byIdCache.get(id);
if (byNameKeyCache == null) {
byIdCache.put(id, byNameKeyCache = createCache());
String[][] zoneStringsEn = DateTimeUtils.getDateFormatSymbols(Locale.ENGLISH).getZoneStrings();
String[] setEn = null;
for (String[] strings : zoneStringsEn) {
if (strings != null && strings.length >= 5 && id.equals(strings[0])) {
setEn = strings;
break;
}
}
String[][] zoneStringsLoc = DateTimeUtils.getDateFormatSymbols(locale).getZoneStrings();
String[] setLoc = null;
for (String[] strings : zoneStringsLoc) {
if (strings != null && strings.length >= 5 && id.equals(strings[0])) {
setLoc = strings;
break;
}
}
if (setEn != null && setLoc != null) {
byNameKeyCache.put(setEn[2], new String[] {setLoc[2], setLoc[1]});
// need to handle case where summer and winter have the same
// abbreviation, such as EST in Australia [1716305]
// we handle this by appending "-Summer", cf ZoneInfoCompiler
if (setEn[2].equals(setEn[4])) {
byNameKeyCache.put(setEn[4] + "-Summer", new String[] {setLoc[4], setLoc[3]});
} else {
byNameKeyCache.put(setEn[4], new String[] {setLoc[4], setLoc[3]});
}
}
}
return (String[]) byNameKeyCache.get(nameKey);
}
//-----------------------------------------------------------------------
// change lookup to operate on boolean standard/summer time flag
// handles changes to the nameKey better
public String getShortName(Locale locale, String id, String nameKey, boolean standardTime) {
String[] nameSet = getNameSet(locale, id, nameKey, standardTime);
return nameSet == null ? null : nameSet[0];
}
public String getName(Locale locale, String id, String nameKey, boolean standardTime) {
String[] nameSet = getNameSet(locale, id, nameKey, standardTime);
return nameSet == null ? null : nameSet[1];
}
private synchronized String[] getNameSet(Locale locale, String id, String nameKey, boolean standardTime) {
if (locale == null || id == null || nameKey == null) {
return null;
}
if (id.startsWith("Etc/")) {
id = id.substring(4);
}
Map> byIdCache = iByLocaleCache2.get(locale);
if (byIdCache == null) {
iByLocaleCache2.put(locale, byIdCache = createCache());
}
Map byNameKeyCache = byIdCache.get(id);
if (byNameKeyCache == null) {
byIdCache.put(id, byNameKeyCache = createCache());
String[][] zoneStringsEn = DateTimeUtils.getDateFormatSymbols(Locale.ENGLISH).getZoneStrings();
String[] setEn = null;
for (String[] strings : zoneStringsEn) {
if (strings != null && strings.length >= 5 && id.equals(strings[0])) {
setEn = strings;
break;
}
}
String[][] zoneStringsLoc = DateTimeUtils.getDateFormatSymbols(locale).getZoneStrings();
String[] setLoc = null;
for (String[] strings : zoneStringsLoc) {
if (strings != null && strings.length >= 5 && id.equals(strings[0])) {
setLoc = strings;
break;
}
}
if (setEn != null && setLoc != null) {
byNameKeyCache.put(Boolean.TRUE, new String[] {setLoc[2], setLoc[1]});
byNameKeyCache.put(Boolean.FALSE, new String[] {setLoc[4], setLoc[3]});
}
}
return (String[]) byNameKeyCache.get(Boolean.valueOf(standardTime));
}
//-----------------------------------------------------------------------
private HashMap createCache() {
return new HashMap(7);
}
}