1 /*
2 * Copyright (c) 1999, 2017, 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.text.DateFormat;
29 import java.text.SimpleDateFormat;
30 import java.text.spi.DateFormatProvider;
31 import java.util.Calendar;
32 import java.util.Locale;
33 import java.util.MissingResourceException;
34 import java.util.Set;
35 import java.util.TimeZone;
36
37 /**
38 * Concrete implementation of the {@link java.text.spi.DateFormatProvider
39 * DateFormatProvider} class for the JRE LocaleProviderAdapter.
40 *
41 * @author Naoto Sato
42 * @author Masayoshi Okutsu
43 */
44 public class DateFormatProviderImpl extends DateFormatProvider implements AvailableLanguageTags {
45 private final LocaleProviderAdapter.Type type;
46 private final Set<String> langtags;
47
48 public DateFormatProviderImpl(LocaleProviderAdapter.Type type, Set<String> langtags) {
49 this.type = type;
50 this.langtags = langtags;
51 }
52
53 /**
54 * Returns an array of all locales for which this locale service provider
55 * can provide localized objects or names.
56 *
57 * @return An array of all locales for which this locale service provider
58 * can provide localized objects or names.
59 */
60 @Override
61 public Locale[] getAvailableLocales() {
62 return LocaleProviderAdapter.toLocaleArray(langtags);
63 }
64
65 @Override
66 public boolean isSupportedLocale(Locale locale) {
67 return LocaleProviderAdapter.forType(type).isSupportedProviderLocale(locale, langtags);
68 }
69
70 /**
71 * Returns a new <code>DateFormat</code> instance which formats time
72 * with the given formatting style for the specified locale.
73 * @param style the given formatting style. Either one of
74 * {@link java.text.DateFormat#SHORT DateFormat.SHORT},
75 * {@link java.text.DateFormat#MEDIUM DateFormat.MEDIUM},
76 * {@link java.text.DateFormat#LONG DateFormat.LONG}, or
77 * {@link java.text.DateFormat#FULL DateFormat.FULL}.
78 * @param locale the desired locale.
79 * @exception IllegalArgumentException if <code>style</code> is invalid,
80 * or if <code>locale</code> isn't
81 * one of the locales returned from
82 * {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()
83 * getAvailableLocales()}.
84 * @exception NullPointerException if <code>locale</code> is null
85 * @return a time formatter.
86 * @see java.text.DateFormat#getTimeInstance(int, java.util.Locale)
87 */
88 @Override
89 public DateFormat getTimeInstance(int style, Locale locale) {
90 return getInstance(-1, style, locale);
91 }
92
93 /**
94 * Returns a new <code>DateFormat</code> instance which formats date
95 * with the given formatting style for the specified locale.
96 * @param style the given formatting style. Either one of
97 * {@link java.text.DateFormat#SHORT DateFormat.SHORT},
98 * {@link java.text.DateFormat#MEDIUM DateFormat.MEDIUM},
99 * {@link java.text.DateFormat#LONG DateFormat.LONG}, or
100 * {@link java.text.DateFormat#FULL DateFormat.FULL}.
101 * @param locale the desired locale.
102 * @exception IllegalArgumentException if <code>style</code> is invalid,
103 * or if <code>locale</code> isn't
104 * one of the locales returned from
105 * {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()
106 * getAvailableLocales()}.
107 * @exception NullPointerException if <code>locale</code> is null
108 * @return a date formatter.
109 * @see java.text.DateFormat#getDateInstance(int, java.util.Locale)
110 */
111 @Override
112 public DateFormat getDateInstance(int style, Locale locale) {
113 return getInstance(style, -1, locale);
114 }
115
116 /**
117 * Returns a new <code>DateFormat</code> instance which formats date and time
118 * with the given formatting style for the specified locale.
119 * @param dateStyle the given date formatting style. Either one of
120 * {@link java.text.DateFormat#SHORT DateFormat.SHORT},
121 * {@link java.text.DateFormat#MEDIUM DateFormat.MEDIUM},
122 * {@link java.text.DateFormat#LONG DateFormat.LONG}, or
123 * {@link java.text.DateFormat#FULL DateFormat.FULL}.
124 * @param timeStyle the given time formatting style. Either one of
125 * {@link java.text.DateFormat#SHORT DateFormat.SHORT},
126 * {@link java.text.DateFormat#MEDIUM DateFormat.MEDIUM},
127 * {@link java.text.DateFormat#LONG DateFormat.LONG}, or
128 * {@link java.text.DateFormat#FULL DateFormat.FULL}.
129 * @param locale the desired locale.
130 * @exception IllegalArgumentException if <code>dateStyle</code> or
131 * <code>timeStyle</code> is invalid,
132 * or if <code>locale</code> isn't
133 * one of the locales returned from
134 * {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()
135 * getAvailableLocales()}.
136 * @exception NullPointerException if <code>locale</code> is null
137 * @return a date/time formatter.
138 * @see java.text.DateFormat#getDateTimeInstance(int, int, java.util.Locale)
139 */
140 @Override
141 public DateFormat getDateTimeInstance(int dateStyle, int timeStyle,
142 Locale locale) {
143 return getInstance(dateStyle, timeStyle, locale);
144 }
145
146 private DateFormat getInstance(int dateStyle, int timeStyle, Locale locale) {
147 if (locale == null) {
148 throw new NullPointerException();
149 }
150
151 // Check for region override
152 Locale rg = CalendarDataUtility.findRegionOverride(locale).orElse(locale);
153
154 SimpleDateFormat sdf = new SimpleDateFormat("", rg);
155 Calendar cal = sdf.getCalendar();
156 try {
157 String pattern = LocaleProviderAdapter.forType(type)
158 .getLocaleResources(rg).getDateTimePattern(timeStyle, dateStyle,
159 cal);
160 sdf.applyPattern(pattern);
161 } catch (MissingResourceException mre) {
162 // Specify the fallback pattern
163 sdf.applyPattern("M/d/yy h:mm a");
164 }
165
166 // Check for timezone override
167 String tz = locale.getUnicodeLocaleType("tz");
168 if (tz != null) {
169 sdf.setTimeZone(
170 TimeZoneNameUtility.convertLDMLShortID(tz)
171 .map(TimeZone::getTimeZone)
172 .orElseGet(sdf::getTimeZone));
173 }
174
175 return sdf;
176 }
177
178 @Override
179 public Set<String> getAvailableLanguageTags() {
180 return langtags;
181 }
182 }