| /* |
| * Copyright (c) 2005, 2019, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.util.locale.provider; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.IllformedLocaleException; |
| import java.util.List; |
| import java.util.Locale; |
| import java.util.Locale.Builder; |
| import java.util.ResourceBundle.Control; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| import java.util.spi.LocaleServiceProvider; |
| import sun.util.logging.PlatformLogger; |
| |
| /** |
| * An instance of this class holds a set of the third party implementations of a particular |
| * locale sensitive service, such as {@link java.util.spi.LocaleNameProvider}. |
| * |
| * @author Naoto Sato |
| * @author Masayoshi Okutsu |
| */ |
| public final class LocaleServiceProviderPool { |
| |
| /** |
| * A Map that holds singleton instances of this class. Each instance holds a |
| * set of provider implementations of a particular locale sensitive service. |
| */ |
| private static final ConcurrentMap<Class<? extends LocaleServiceProvider>, LocaleServiceProviderPool> poolOfPools = |
| new ConcurrentHashMap<>(); |
| |
| /** |
| * A Map that retains Locale->provider mapping |
| */ |
| private final ConcurrentMap<Locale, List<LocaleServiceProvider>> providersCache = |
| new ConcurrentHashMap<>(); |
| |
| /** |
| * Available locales for this locale sensitive service. This also contains |
| * JRE's available locales |
| */ |
| private Set<Locale> availableLocales = null; |
| |
| /** |
| * Provider class |
| */ |
| private final Class<? extends LocaleServiceProvider> providerClass; |
| |
| /** |
| * Array of all Locale Sensitive SPI classes. |
| * |
| * We know "spiClasses" contains classes that extends LocaleServiceProvider, |
| * but generic array creation is not allowed, thus the "unchecked" warning |
| * is suppressed here. |
| */ |
| @SuppressWarnings("unchecked") |
| static final Class<LocaleServiceProvider>[] spiClasses = |
| (Class<LocaleServiceProvider>[]) new Class<?>[] { |
| java.text.spi.BreakIteratorProvider.class, |
| java.text.spi.CollatorProvider.class, |
| java.text.spi.DateFormatProvider.class, |
| java.text.spi.DateFormatSymbolsProvider.class, |
| java.text.spi.DecimalFormatSymbolsProvider.class, |
| java.text.spi.NumberFormatProvider.class, |
| java.util.spi.CurrencyNameProvider.class, |
| java.util.spi.LocaleNameProvider.class, |
| java.util.spi.TimeZoneNameProvider.class, |
| java.util.spi.CalendarDataProvider.class |
| }; |
| |
| /** |
| * A factory method that returns a singleton instance |
| */ |
| public static LocaleServiceProviderPool getPool(Class<? extends LocaleServiceProvider> providerClass) { |
| LocaleServiceProviderPool pool = poolOfPools.get(providerClass); |
| if (pool == null) { |
| LocaleServiceProviderPool newPool = |
| new LocaleServiceProviderPool(providerClass); |
| pool = poolOfPools.putIfAbsent(providerClass, newPool); |
| if (pool == null) { |
| pool = newPool; |
| } |
| } |
| |
| return pool; |
| } |
| |
| /** |
| * The sole constructor. |
| * |
| * @param c class of the locale sensitive service |
| */ |
| private LocaleServiceProviderPool (final Class<? extends LocaleServiceProvider> c) { |
| providerClass = c; |
| } |
| |
| static void config(Class<? extends Object> caller, String message) { |
| PlatformLogger logger = PlatformLogger.getLogger(caller.getCanonicalName()); |
| logger.config(message); |
| } |
| |
| /** |
| * Lazy loaded set of available locales. |
| * Loading all locales is a very long operation. |
| */ |
| private static class AllAvailableLocales { |
| /** |
| * Available locales for all locale sensitive services. |
| * This also contains JRE's available locales |
| */ |
| static final Locale[] allAvailableLocales; |
| |
| static { |
| Set<Locale> all = new HashSet<>(); |
| for (Class<? extends LocaleServiceProvider> c : spiClasses) { |
| LocaleServiceProviderPool pool = |
| LocaleServiceProviderPool.getPool(c); |
| all.addAll(pool.getAvailableLocaleSet()); |
| } |
| |
| allAvailableLocales = all.toArray(new Locale[0]); |
| } |
| |
| // No instantiation |
| private AllAvailableLocales() { |
| } |
| } |
| |
| /** |
| * Returns an array of available locales for all the provider classes. |
| * This array is a merged array of all the locales that are provided by each |
| * provider, including the JRE. |
| * |
| * @return an array of the available locales for all provider classes |
| */ |
| public static Locale[] getAllAvailableLocales() { |
| return AllAvailableLocales.allAvailableLocales.clone(); |
| } |
| |
| /** |
| * Returns an array of available locales. This array is a |
| * merged array of all the locales that are provided by each |
| * provider, including the JRE. |
| * |
| * @return an array of the available locales |
| */ |
| public Locale[] getAvailableLocales() { |
| Set<Locale> locList = new HashSet<>(); |
| locList.addAll(getAvailableLocaleSet()); |
| // Make sure it all contains JRE's locales for compatibility. |
| locList.addAll(Arrays.asList(LocaleProviderAdapter.forJRE().getAvailableLocales())); |
| Locale[] tmp = new Locale[locList.size()]; |
| locList.toArray(tmp); |
| return tmp; |
| } |
| |
| /** |
| * Returns the union of locale sets that are available from |
| * each service provider. This method does NOT return the |
| * defensive copy. |
| * |
| * @return a set of available locales |
| */ |
| private synchronized Set<Locale> getAvailableLocaleSet() { |
| if (availableLocales == null) { |
| availableLocales = new HashSet<>(); |
| for (LocaleProviderAdapter.Type type : LocaleProviderAdapter.getAdapterPreference()) { |
| LocaleProviderAdapter lda = LocaleProviderAdapter.forType(type); |
| if (lda != null) { |
| LocaleServiceProvider lsp = lda.getLocaleServiceProvider(providerClass); |
| if (lsp != null) { |
| Locale[] locales = lsp.getAvailableLocales(); |
| for (Locale locale: locales) { |
| availableLocales.add(getLookupLocale(locale)); |
| } |
| } |
| } |
| } |
| } |
| |
| return availableLocales; |
| } |
| |
| /** |
| * Returns the provider's localized object for the specified |
| * locale. |
| * |
| * @param getter an object on which getObject() method |
| * is called to obtain the provider's instance. |
| * @param locale the given locale that is used as the starting one |
| * @param params provider specific parameters |
| * @return provider's instance, or null. |
| */ |
| public <P extends LocaleServiceProvider, S> S getLocalizedObject(LocalizedObjectGetter<P, S> getter, |
| Locale locale, |
| Object... params) { |
| return getLocalizedObjectImpl(getter, locale, true, null, params); |
| } |
| |
| /** |
| * Returns the provider's localized name for the specified |
| * locale. |
| * |
| * @param getter an object on which getObject() method |
| * is called to obtain the provider's instance. |
| * @param locale the given locale that is used as the starting one |
| * @param key the key string for name providers |
| * @param params provider specific parameters |
| * @return provider's instance, or null. |
| */ |
| public <P extends LocaleServiceProvider, S> S getLocalizedObject(LocalizedObjectGetter<P, S> getter, |
| Locale locale, |
| String key, |
| Object... params) { |
| return getLocalizedObjectImpl(getter, locale, false, key, params); |
| } |
| |
| /** |
| * Returns the provider's localized name for the specified |
| * locale. |
| * |
| * @param getter an object on which getObject() method |
| * is called to obtain the provider's instance. |
| * @param locale the given locale that is used as the starting one |
| * @param isObjectProvider flag designating object provder or not |
| * @param key the key string for name providers |
| * @param params provider specific parameters |
| * @return provider's instance, or null. |
| */ |
| public <P extends LocaleServiceProvider, S> S getLocalizedObject(LocalizedObjectGetter<P, S> getter, |
| Locale locale, |
| Boolean isObjectProvider, |
| String key, |
| Object... params) { |
| return getLocalizedObjectImpl(getter, locale, isObjectProvider, key, params); |
| } |
| |
| @SuppressWarnings("unchecked") |
| private <P extends LocaleServiceProvider, S> S getLocalizedObjectImpl(LocalizedObjectGetter<P, S> getter, |
| Locale locale, |
| boolean isObjectProvider, |
| String key, |
| Object... params) { |
| if (locale == null) { |
| throw new NullPointerException(); |
| } |
| |
| List<Locale> lookupLocales = getLookupLocales(locale); |
| |
| for (Locale current : lookupLocales) { |
| S providersObj; |
| |
| for (LocaleServiceProvider lsp: findProviders(current, isObjectProvider)) { |
| providersObj = getter.getObject((P)lsp, locale, key, params); |
| if (providersObj != null) { |
| return providersObj; |
| } else if (isObjectProvider) { |
| config(LocaleServiceProviderPool.class, |
| "A locale sensitive service object provider returned null, " + |
| "which should not happen. Provider: " + lsp + " Locale: " + locale); |
| } |
| } |
| } |
| |
| // not found. |
| return null; |
| } |
| |
| /** |
| * Returns the list of locale service provider instances that support |
| * the specified locale. |
| * |
| * @param locale the given locale |
| * @return the list of locale data adapter types |
| */ |
| private List<LocaleServiceProvider> findProviders(Locale locale, boolean isObjectProvider) { |
| List<LocaleServiceProvider> providersList = providersCache.get(locale); |
| if (providersList == null) { |
| for (LocaleProviderAdapter.Type type : LocaleProviderAdapter.getAdapterPreference()) { |
| LocaleProviderAdapter lda = LocaleProviderAdapter.forType(type); |
| if (lda != null) { |
| LocaleServiceProvider lsp = lda.getLocaleServiceProvider(providerClass); |
| if (lsp != null) { |
| if (lsp.isSupportedLocale(locale)) { |
| if (providersList == null) { |
| providersList = new ArrayList<>(2); |
| } |
| providersList.add(lsp); |
| if (isObjectProvider) { |
| break; |
| } |
| } |
| } |
| } |
| } |
| if (providersList == null) { |
| providersList = NULL_LIST; |
| } |
| List<LocaleServiceProvider> val = providersCache.putIfAbsent(locale, providersList); |
| if (val != null) { |
| providersList = val; |
| } |
| } |
| return providersList; |
| } |
| |
| /** |
| * Returns a list of candidate locales for service look up. |
| * @param locale the input locale |
| * @return the list of candidate locales for the given locale |
| */ |
| static List<Locale> getLookupLocales(Locale locale) { |
| // Note: We currently use the default implementation of |
| // ResourceBundle.Control.getCandidateLocales. The result |
| // returned by getCandidateLocales are already normalized |
| // (no extensions) for service look up. |
| List<Locale> lookupLocales = Control.getNoFallbackControl(Control.FORMAT_DEFAULT) |
| .getCandidateLocales("", locale); |
| return lookupLocales; |
| } |
| |
| /** |
| * Returns an instance of Locale used for service look up. |
| * The result Locale has no extensions except for ja_JP_JP |
| * and th_TH_TH |
| * |
| * @param locale the locale |
| * @return the locale used for service look up |
| */ |
| static Locale getLookupLocale(Locale locale) { |
| Locale lookupLocale = locale; |
| if (locale.hasExtensions() |
| && !locale.equals(JRELocaleConstants.JA_JP_JP) |
| && !locale.equals(JRELocaleConstants.TH_TH_TH)) { |
| // remove extensions |
| Builder locbld = new Builder(); |
| try { |
| locbld.setLocale(locale); |
| locbld.clearExtensions(); |
| lookupLocale = locbld.build(); |
| } catch (IllformedLocaleException e) { |
| // A Locale with non-empty extensions |
| // should have well-formed fields except |
| // for ja_JP_JP and th_TH_TH. Therefore, |
| // it should never enter in this catch clause. |
| config(LocaleServiceProviderPool.class, |
| "A locale(" + locale + ") has non-empty extensions, but has illformed fields."); |
| |
| // Fallback - script field will be lost. |
| lookupLocale = new Locale(locale.getLanguage(), locale.getCountry(), locale.getVariant()); |
| } |
| } |
| return lookupLocale; |
| } |
| |
| /** |
| * A dummy locale service provider list that indicates there is no |
| * provider available |
| */ |
| private static final List<LocaleServiceProvider> NULL_LIST = |
| Collections.emptyList(); |
| |
| /** |
| * An interface to get a localized object for each locale sensitive |
| * service class. |
| */ |
| public interface LocalizedObjectGetter<P extends LocaleServiceProvider, S> { |
| /** |
| * Returns an object from the provider |
| * |
| * @param lsp the provider |
| * @param locale the locale |
| * @param key key string to localize, or null if the provider is not |
| * a name provider |
| * @param params provider specific params |
| * @return localized object from the provider |
| */ |
| public S getObject(P lsp, |
| Locale locale, |
| String key, |
| Object... params); |
| } |
| } |