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/*
 *  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); } }





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