1 /*
2 * Copyright (c) 1999, 2012, 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
36 /**
37 * Concrete implementation of the {@link java.text.spi.DateFormatProvider
38 * DateFormatProvider} class for the JRE LocaleProviderAdapter.
39 *
40 * @author Naoto Sato
41 * @author Masayoshi Okutsu
42 */
43 public class DateFormatProviderImpl extends DateFormatProvider implements AvailableLanguageTags {
44 private final LocaleProviderAdapter.Type type;
45 private final Set<String> langtags;
46
47 public DateFormatProviderImpl(LocaleProviderAdapter.Type type, Set<String> langtags) {
48 this.type = type;
49 this.langtags = langtags;
50 }
51
52 /**
53 * Returns an array of all locales for which this locale service provider
54 * can provide localized objects or names.
55 *
56 * @return An array of all locales for which this locale service provider
57 * can provide localized objects or names.
58 */
59 @Override
60 public Locale[] getAvailableLocales() {
61 return LocaleProviderAdapter.toLocaleArray(langtags);
62 }
63
64 @Override
65 public boolean isSupportedLocale(Locale locale) {
66 return LocaleProviderAdapter.isSupportedLocale(locale, type, langtags);
67 }
68
69 /**
70 * Returns a new <code>DateFormat</code> instance which formats time
71 * with the given formatting style for the specified locale.
72 * @param style the given formatting style. Either one of
73 * {@link java.text.DateFormat#SHORT DateFormat.SHORT},
74 * {@link java.text.DateFormat#MEDIUM DateFormat.MEDIUM},
75 * {@link java.text.DateFormat#LONG DateFormat.LONG}, or
76 * {@link java.text.DateFormat#FULL DateFormat.FULL}.
77 * @param locale the desired locale.
78 * @exception IllegalArgumentException if <code>style</code> is invalid,
79 * or if <code>locale</code> isn't
80 * one of the locales returned from
81 * {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()
82 * getAvailableLocales()}.
83 * @exception NullPointerException if <code>locale</code> is null
84 * @return a time formatter.
85 * @see java.text.DateFormat#getTimeInstance(int, java.util.Locale)
86 */
87 @Override
88 public DateFormat getTimeInstance(int style, Locale locale) {
89 return getInstance(-1, style, locale);
90 }
91
92 /**
93 * Returns a new <code>DateFormat</code> instance which formats date
94 * with the given formatting style for the specified locale.
95 * @param style the given formatting style. Either one of
96 * {@link java.text.DateFormat#SHORT DateFormat.SHORT},
97 * {@link java.text.DateFormat#MEDIUM DateFormat.MEDIUM},
98 * {@link java.text.DateFormat#LONG DateFormat.LONG}, or
99 * {@link java.text.DateFormat#FULL DateFormat.FULL}.
100 * @param locale the desired locale.
101 * @exception IllegalArgumentException if <code>style</code> is invalid,
102 * or if <code>locale</code> isn't
103 * one of the locales returned from
104 * {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()
105 * getAvailableLocales()}.
106 * @exception NullPointerException if <code>locale</code> is null
107 * @return a date formatter.
108 * @see java.text.DateFormat#getDateInstance(int, java.util.Locale)
109 */
110 @Override
111 public DateFormat getDateInstance(int style, Locale locale) {
112 return getInstance(style, -1, locale);
113 }
114
115 /**
116 * Returns a new <code>DateFormat</code> instance which formats date and time
117 * with the given formatting style for the specified locale.
118 * @param dateStyle the given date formatting style. Either one of
119 * {@link java.text.DateFormat#SHORT DateFormat.SHORT},
120 * {@link java.text.DateFormat#MEDIUM DateFormat.MEDIUM},
121 * {@link java.text.DateFormat#LONG DateFormat.LONG}, or
122 * {@link java.text.DateFormat#FULL DateFormat.FULL}.
123 * @param timeStyle the given time formatting style. Either one of
124 * {@link java.text.DateFormat#SHORT DateFormat.SHORT},
125 * {@link java.text.DateFormat#MEDIUM DateFormat.MEDIUM},
126 * {@link java.text.DateFormat#LONG DateFormat.LONG}, or
127 * {@link java.text.DateFormat#FULL DateFormat.FULL}.
128 * @param locale the desired locale.
129 * @exception IllegalArgumentException if <code>dateStyle</code> or
130 * <code>timeStyle</code> is invalid,
131 * or if <code>locale</code> isn't
132 * one of the locales returned from
133 * {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()
134 * getAvailableLocales()}.
135 * @exception NullPointerException if <code>locale</code> is null
136 * @return a date/time formatter.
137 * @see java.text.DateFormat#getDateTimeInstance(int, int, java.util.Locale)
138 */
139 @Override
140 public DateFormat getDateTimeInstance(int dateStyle, int timeStyle,
141 Locale locale) {
142 return getInstance(dateStyle, timeStyle, locale);
143 }
144
145 private DateFormat getInstance(int dateStyle, int timeStyle, Locale locale) {
146 if (locale == null) {
147 throw new NullPointerException();
148 }
149
150 SimpleDateFormat sdf = new SimpleDateFormat("", locale);
151 Calendar cal = sdf.getCalendar();
152 try {
153 String pattern = LocaleProviderAdapter.forType(type)
154 .getLocaleResources(locale).getDateTimePattern(timeStyle, dateStyle,
155 cal);
156 sdf.applyPattern(pattern);
157 } catch (MissingResourceException mre) {
158 // Specify the fallback pattern
159 sdf.applyPattern("M/d/yy h:mm a");
160 }
161
162 return sdf;
163 }
164
165 @Override
166 public Set<String> getAvailableLanguageTags() {
167 return langtags;
168 }
169 }