1 /*
2 * Copyright (c) 2012, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.util.locale.provider;
27
28 import java.security.AccessController;
29 import java.security.PrivilegedAction;
30 import java.text.spi.BreakIteratorProvider;
31 import java.text.spi.CollatorProvider;
32 import java.text.spi.DateFormatProvider;
33 import java.text.spi.DateFormatSymbolsProvider;
34 import java.text.spi.DecimalFormatSymbolsProvider;
35 import java.text.spi.NumberFormatProvider;
36 import java.util.ArrayList;
37 import java.util.Arrays;
38 import java.util.List;
39 import java.util.Locale;
40 import java.util.concurrent.ConcurrentHashMap;
41 import java.util.concurrent.ConcurrentMap;
42 import java.util.spi.CalendarDataProvider;
43 import java.util.spi.CalendarNameProvider;
44 import java.util.spi.CurrencyNameProvider;
45 import java.util.spi.LocaleNameProvider;
46 import java.util.spi.LocaleServiceProvider;
47 import java.util.spi.TimeZoneNameProvider;
48 import sun.text.spi.JavaTimeDateTimePatternProvider;
49 import sun.util.spi.CalendarProvider;
50
51 /**
52 * An abstract parent class for the
53 * HostLocaleProviderAdapter/SPILocaleProviderAdapter.
54 *
55 * @author Naoto Sato
56 * @author Masayoshi Okutsu
57 */
58 public abstract class AuxLocaleProviderAdapter extends LocaleProviderAdapter {
59 /**
60 * SPI implementations map
61 */
62 private final ConcurrentMap<Class<? extends LocaleServiceProvider>, LocaleServiceProvider> providersMap =
63 new ConcurrentHashMap<>();
64
65 /**
66 * Getter method for Locale Service Providers
67 */
68 @Override
69 public <P extends LocaleServiceProvider> P getLocaleServiceProvider(Class<P> c) {
70 @SuppressWarnings("unchecked")
71 P lsp = (P) providersMap.get(c);
72 if (lsp == null) {
73 lsp = findInstalledProvider(c);
74 providersMap.putIfAbsent(c, lsp == null ? NULL_PROVIDER : lsp);
75 }
76
77 return lsp;
78 }
79
80 /**
81 * Real body to find an implementation for each SPI.
82 *
83 * @param <P>
84 * @param c
85 * @return
86 */
87 protected abstract <P extends LocaleServiceProvider> P findInstalledProvider(final Class<P> c);
88
89 @Override
90 public BreakIteratorProvider getBreakIteratorProvider() {
91 return getLocaleServiceProvider(BreakIteratorProvider.class);
92 }
93
94 @Override
95 public CollatorProvider getCollatorProvider() {
96 return getLocaleServiceProvider(CollatorProvider.class);
97 }
98
99 @Override
100 public DateFormatProvider getDateFormatProvider() {
101 return getLocaleServiceProvider(DateFormatProvider.class);
102 }
103
104 @Override
105 public DateFormatSymbolsProvider getDateFormatSymbolsProvider() {
106 return getLocaleServiceProvider(DateFormatSymbolsProvider.class);
107 }
108
109 @Override
110 public DecimalFormatSymbolsProvider getDecimalFormatSymbolsProvider() {
111 return getLocaleServiceProvider(DecimalFormatSymbolsProvider.class);
112 }
113
114 @Override
115 public NumberFormatProvider getNumberFormatProvider() {
116 return getLocaleServiceProvider(NumberFormatProvider.class);
117 }
118
119 /**
120 * Getter methods for java.util.spi.* providers
121 */
122 @Override
123 public CurrencyNameProvider getCurrencyNameProvider() {
124 return getLocaleServiceProvider(CurrencyNameProvider.class);
125 }
126
127 @Override
128 public LocaleNameProvider getLocaleNameProvider() {
129 return getLocaleServiceProvider(LocaleNameProvider.class);
130 }
131
132 @Override
133 public TimeZoneNameProvider getTimeZoneNameProvider() {
134 return getLocaleServiceProvider(TimeZoneNameProvider.class);
135 }
136
137 @Override
138 public CalendarDataProvider getCalendarDataProvider() {
139 return getLocaleServiceProvider(CalendarDataProvider.class);
140 }
141
142 @Override
143 public CalendarNameProvider getCalendarNameProvider() {
144 return getLocaleServiceProvider(CalendarNameProvider.class);
145 }
146
147 /**
148 * Getter methods for sun.util.spi.* providers
149 */
150 @Override
151 public CalendarProvider getCalendarProvider() {
152 return getLocaleServiceProvider(CalendarProvider.class);
153 }
154
155 @Override
156 public LocaleResources getLocaleResources(Locale locale) {
157 return null;
158 }
159
160 @Override
161 public JavaTimeDateTimePatternProvider getJavaTimeDateTimePatternProvider() {
162 return getLocaleServiceProvider(JavaTimeDateTimePatternProvider.class);
163 }
164
165 private static Locale[] availableLocales = null;
166
167 @Override
168 public Locale[] getAvailableLocales() {
169 if (availableLocales == null) {
170 List<Locale> avail = new ArrayList<>();
171 for (Class<? extends LocaleServiceProvider> c :
172 LocaleServiceProviderPool.spiClasses) {
173 LocaleServiceProvider lsp = getLocaleServiceProvider(c);
174 if (lsp != null) {
175 avail.addAll(Arrays.asList(lsp.getAvailableLocales()));
176 }
177 }
178 availableLocales = avail.toArray(new Locale[0]);
179 }
180
181 // assuming caller won't mutate the array.
182 return availableLocales;
183 }
184
185 /**
186 * A dummy locale service provider that indicates there is no
187 * provider available
188 */
189 private static final NullProvider NULL_PROVIDER = AccessController.doPrivileged(
190 (PrivilegedAction<NullProvider>) () -> new NullProvider());
191
192 private static class NullProvider extends LocaleServiceProvider {
193 @Override
194 public Locale[] getAvailableLocales() {
195 return new Locale[0];
196 }
197 }
198 }