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
26package sun.util.locale.provider;
27
28import java.text.DateFormatSymbols;
29import java.text.spi.DateFormatSymbolsProvider;
30import java.util.Locale;
31import java.util.Set;
32
33/**
34 * Concrete implementation of the  {@link java.text.spi.DateFormatSymbolsProvider
35 * DateFormatSymbolsProvider} class for the JRE LocaleProviderAdapter.
36 *
37 * @author Naoto Sato
38 * @author Masayoshi Okutsu
39 */
40public class DateFormatSymbolsProviderImpl extends DateFormatSymbolsProvider implements AvailableLanguageTags {
41    private final LocaleProviderAdapter.Type type;
42    private final Set<String> langtags;
43
44    public DateFormatSymbolsProviderImpl(LocaleProviderAdapter.Type type, Set<String> langtags) {
45        this.type = type;
46        this.langtags = langtags;
47    }
48
49    /**
50     * Returns an array of all locales for which this locale service provider
51     * can provide localized objects or names.
52     *
53     * @return An array of all locales for which this locale service provider
54     * can provide localized objects or names.
55     */
56    @Override
57    public Locale[] getAvailableLocales() {
58        return LocaleProviderAdapter.toLocaleArray(langtags);
59    }
60
61    @Override
62    public boolean isSupportedLocale(Locale locale) {
63        return LocaleProviderAdapter.forType(type).isSupportedProviderLocale(locale, langtags);
64    }
65
66    /**
67     * Returns a new <code>DateFormatSymbols</code> instance for the
68     * specified locale.
69     *
70     * @param locale the desired locale
71     * @exception NullPointerException if <code>locale</code> is null
72     * @exception IllegalArgumentException if <code>locale</code> isn't
73     *     one of the locales returned from
74     *     {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()
75     *     getAvailableLocales()}.
76     * @return a <code>DateFormatSymbols</code> instance.
77     * @see java.text.DateFormatSymbols#getInstance(java.util.Locale)
78     */
79    @Override
80    public DateFormatSymbols getInstance(Locale locale) {
81        if (locale == null) {
82            throw new NullPointerException();
83        }
84
85        return new DateFormatSymbols(locale);
86    }
87
88    @Override
89    public Set<String> getAvailableLanguageTags() {
90        return langtags;
91    }
92}
93