| /* |
| * Copyright (c) 2012, 2021, 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.security.AccessController; |
| import java.security.PrivilegedAction; |
| import java.text.spi.BreakIteratorProvider; |
| import java.text.spi.CollatorProvider; |
| import java.text.spi.DateFormatProvider; |
| import java.text.spi.DateFormatSymbolsProvider; |
| import java.text.spi.DecimalFormatSymbolsProvider; |
| import java.text.spi.NumberFormatProvider; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.Locale; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| import java.util.spi.CalendarDataProvider; |
| import java.util.spi.CalendarNameProvider; |
| import java.util.spi.CurrencyNameProvider; |
| import java.util.spi.LocaleNameProvider; |
| import java.util.spi.LocaleServiceProvider; |
| import java.util.spi.TimeZoneNameProvider; |
| import sun.text.spi.JavaTimeDateTimePatternProvider; |
| import sun.util.spi.CalendarProvider; |
| |
| /** |
| * An abstract parent class for the |
| * HostLocaleProviderAdapter/SPILocaleProviderAdapter. |
| * |
| * @author Naoto Sato |
| * @author Masayoshi Okutsu |
| */ |
| public abstract class AuxLocaleProviderAdapter extends LocaleProviderAdapter { |
| /** |
| * SPI implementations map |
| */ |
| private final ConcurrentMap<Class<? extends LocaleServiceProvider>, LocaleServiceProvider> providersMap = |
| new ConcurrentHashMap<>(); |
| |
| /** |
| * Getter method for Locale Service Providers |
| */ |
| @Override |
| public <P extends LocaleServiceProvider> P getLocaleServiceProvider(Class<P> c) { |
| @SuppressWarnings("unchecked") |
| P lsp = (P) providersMap.get(c); |
| if (lsp == null) { |
| lsp = findInstalledProvider(c); |
| providersMap.putIfAbsent(c, lsp == null ? NULL_PROVIDER : lsp); |
| } |
| |
| return lsp; |
| } |
| |
| /** |
| * Real body to find an implementation for each SPI. |
| * |
| * @param <P> |
| * @param c |
| * @return |
| */ |
| protected abstract <P extends LocaleServiceProvider> P findInstalledProvider(final Class<P> c); |
| |
| @Override |
| public BreakIteratorProvider getBreakIteratorProvider() { |
| return getLocaleServiceProvider(BreakIteratorProvider.class); |
| } |
| |
| @Override |
| public CollatorProvider getCollatorProvider() { |
| return getLocaleServiceProvider(CollatorProvider.class); |
| } |
| |
| @Override |
| public DateFormatProvider getDateFormatProvider() { |
| return getLocaleServiceProvider(DateFormatProvider.class); |
| } |
| |
| @Override |
| public DateFormatSymbolsProvider getDateFormatSymbolsProvider() { |
| return getLocaleServiceProvider(DateFormatSymbolsProvider.class); |
| } |
| |
| @Override |
| public DecimalFormatSymbolsProvider getDecimalFormatSymbolsProvider() { |
| return getLocaleServiceProvider(DecimalFormatSymbolsProvider.class); |
| } |
| |
| @Override |
| public NumberFormatProvider getNumberFormatProvider() { |
| return getLocaleServiceProvider(NumberFormatProvider.class); |
| } |
| |
| /** |
| * Getter methods for java.util.spi.* providers |
| */ |
| @Override |
| public CurrencyNameProvider getCurrencyNameProvider() { |
| return getLocaleServiceProvider(CurrencyNameProvider.class); |
| } |
| |
| @Override |
| public LocaleNameProvider getLocaleNameProvider() { |
| return getLocaleServiceProvider(LocaleNameProvider.class); |
| } |
| |
| @Override |
| public TimeZoneNameProvider getTimeZoneNameProvider() { |
| return getLocaleServiceProvider(TimeZoneNameProvider.class); |
| } |
| |
| @Override |
| public CalendarDataProvider getCalendarDataProvider() { |
| return getLocaleServiceProvider(CalendarDataProvider.class); |
| } |
| |
| @Override |
| public CalendarNameProvider getCalendarNameProvider() { |
| return getLocaleServiceProvider(CalendarNameProvider.class); |
| } |
| |
| /** |
| * Getter methods for sun.util.spi.* providers |
| */ |
| @Override |
| public CalendarProvider getCalendarProvider() { |
| return getLocaleServiceProvider(CalendarProvider.class); |
| } |
| |
| @Override |
| public LocaleResources getLocaleResources(Locale locale) { |
| return null; |
| } |
| |
| @Override |
| public JavaTimeDateTimePatternProvider getJavaTimeDateTimePatternProvider() { |
| return getLocaleServiceProvider(JavaTimeDateTimePatternProvider.class); |
| } |
| |
| private static Locale[] availableLocales = null; |
| |
| @Override |
| public Locale[] getAvailableLocales() { |
| if (availableLocales == null) { |
| List<Locale> avail = new ArrayList<>(); |
| for (Class<? extends LocaleServiceProvider> c : |
| LocaleServiceProviderPool.spiClasses) { |
| LocaleServiceProvider lsp = getLocaleServiceProvider(c); |
| if (lsp != null) { |
| avail.addAll(Arrays.asList(lsp.getAvailableLocales())); |
| } |
| } |
| availableLocales = avail.toArray(new Locale[0]); |
| } |
| |
| // assuming caller won't mutate the array. |
| return availableLocales; |
| } |
| |
| /** |
| * A dummy locale service provider that indicates there is no |
| * provider available |
| */ |
| @SuppressWarnings("removal") |
| private static final NullProvider NULL_PROVIDER = AccessController.doPrivileged( |
| (PrivilegedAction<NullProvider>) () -> new NullProvider()); |
| |
| private static class NullProvider extends LocaleServiceProvider { |
| @Override |
| public Locale[] getAvailableLocales() { |
| return new Locale[0]; |
| } |
| } |
| } |