| 1 | /* |
| 2 | * Copyright 2001-2005 Stephen Colebourne |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.joda.time.tz; |
| 17 | |
| 18 | import java.text.DateFormatSymbols; |
| 19 | import java.util.HashMap; |
| 20 | import java.util.Locale; |
| 21 | |
| 22 | /** |
| 23 | * The default name provider acquires localized names from |
| 24 | * {@link DateFormatSymbols java.text.DateFormatSymbols}. |
| 25 | * <p> |
| 26 | * DefaultNameProvider is thread-safe and immutable. |
| 27 | * |
| 28 | * @author Brian S O'Neill |
| 29 | * @since 1.0 |
| 30 | */ |
| 31 | public class DefaultNameProvider implements NameProvider { |
| 32 | // locale -> (id -> (nameKey -> [shortName, name])) |
| 33 | private HashMap iByLocaleCache = createCache(); |
| 34 | |
| 35 | public DefaultNameProvider() { |
| 36 | } |
| 37 | |
| 38 | public String getShortName(Locale locale, String id, String nameKey) { |
| 39 | String[] nameSet = getNameSet(locale, id, nameKey); |
| 40 | return nameSet == null ? null : nameSet[0]; |
| 41 | } |
| 42 | |
| 43 | public String getName(Locale locale, String id, String nameKey) { |
| 44 | String[] nameSet = getNameSet(locale, id, nameKey); |
| 45 | return nameSet == null ? null : nameSet[1]; |
| 46 | } |
| 47 | |
| 48 | private synchronized String[] getNameSet(Locale locale, String id, String nameKey) { |
| 49 | if (locale == null || id == null || nameKey == null) { |
| 50 | return null; |
| 51 | } |
| 52 | |
| 53 | HashMap byIdCache = (HashMap)iByLocaleCache.get(locale); |
| 54 | if (byIdCache == null) { |
| 55 | iByLocaleCache.put(locale, byIdCache = createCache()); |
| 56 | } |
| 57 | |
| 58 | HashMap byNameKeyCache = (HashMap)byIdCache.get(id); |
| 59 | if (byNameKeyCache == null) { |
| 60 | byIdCache.put(id, byNameKeyCache = createCache()); |
| 61 | String[][] zoneStrings = new DateFormatSymbols(locale).getZoneStrings(); |
| 62 | for (int i=0; i<zoneStrings.length; i++) { |
| 63 | String[] set = zoneStrings[i]; |
| 64 | if (set != null && set.length == 5 && id.equals(set[0])) { |
| 65 | byNameKeyCache.put(set[2], new String[] {set[2], set[1]}); |
| 66 | // need to handle case where summer and winter have the same |
| 67 | // abbreviation, such as EST in Australia [1716305] |
| 68 | // we handle this by appending "-Summer", cf ZoneInfoCompiler |
| 69 | if (set[2].equals(set[4])) { |
| 70 | byNameKeyCache.put(set[4] + "-Summer", new String[] {set[4], set[3]}); |
| 71 | } else { |
| 72 | byNameKeyCache.put(set[4], new String[] {set[4], set[3]}); |
| 73 | } |
| 74 | break; |
| 75 | } |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | return (String[])byNameKeyCache.get(nameKey); |
| 80 | } |
| 81 | |
| 82 | private HashMap createCache() { |
| 83 | return new HashMap(7); |
| 84 | } |
| 85 | } |