1 /*
2 * Copyright (c) 2012, 2014, 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.util.Locale;
29 import java.util.Set;
30 import java.util.spi.CurrencyNameProvider;
31
32 /**
33 * Concrete implementation of the
34 * {@link java.util.spi.CurrencyNameProvider CurrencyNameProvider} class
35 * for the JRE LocaleProviderAdapter.
36 *
37 * @author Naoto Sato
38 * @author Masayoshi Okutsu
39 */
40 public class CurrencyNameProviderImpl extends CurrencyNameProvider
41 implements AvailableLanguageTags {
42 private final LocaleProviderAdapter.Type type;
43 private Set<String> langtags;
44
45 public CurrencyNameProviderImpl(LocaleProviderAdapter.Type type) {
46 this.type = type;
47 }
48
49 @Override
50 public Set<String> getAvailableLanguageTags() {
51 return getLangTags();
52 }
53
54 /**
55 * Returns an array of all locales for which this locale service provider
56 * can provide localized objects or names.
57 *
58 * @return An array of all locales for which this locale service provider
59 * can provide localized objects or names.
60 */
61 @Override
62 public Locale[] getAvailableLocales() {
63 return LocaleProviderAdapter.toLocaleArray(getLangTags());
64 }
65
66 /**
67 * Gets the symbol of the given currency code for the specified locale.
68 * For example, for "USD" (US Dollar), the symbol is "$" if the specified
69 * locale is the US, while for other locales it may be "US$". If no
70 * symbol can be determined, null should be returned.
71 *
72 * @param currencyCode the ISO 4217 currency code, which
73 * consists of three upper-case letters between 'A' (U+0041) and
74 * 'Z' (U+005A)
75 * @param locale the desired locale
76 * @return the symbol of the given currency code for the specified locale, or null if
77 * the symbol is not available for the locale
78 * @exception NullPointerException if <code>currencyCode</code> or
79 * <code>locale</code> is null
80 * @exception IllegalArgumentException if <code>currencyCode</code> is not in
81 * the form of three upper-case letters, or <code>locale</code> isn't
82 * one of the locales returned from
83 * {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()
84 * getAvailableLocales()}.
85 * @see java.util.Currency#getSymbol(java.util.Locale)
86 */
87 @Override
88 public String getSymbol(String currencyCode, Locale locale) {
89 return getString(currencyCode.toUpperCase(Locale.ROOT), locale);
90 }
91
92 /**
93 * Returns a name for the currency that is appropriate for display to the
94 * user. The default implementation returns null.
95 *
96 * @param currencyCode the ISO 4217 currency code, which
97 * consists of three upper-case letters between 'A' (U+0041) and
98 * 'Z' (U+005A)
99 * @param locale the desired locale
100 * @return the name for the currency that is appropriate for display to the
101 * user, or null if the name is not available for the locale
102 * @exception IllegalArgumentException if <code>currencyCode</code> is not in
103 * the form of three upper-case letters, or <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>currencyCode</code> or
108 * <code>locale</code> is <code>null</code>
109 * @since 1.7
110 */
111 @Override
112 public String getDisplayName(String currencyCode, Locale locale) {
113 return getString(currencyCode.toLowerCase(Locale.ROOT), locale);
114 }
115
116 private String getString(String key, Locale locale) {
117 if (locale == null) {
118 throw new NullPointerException();
119 }
120
121 return LocaleProviderAdapter.forType(type).getLocaleResources(locale).getCurrencyName(key);
122 }
123
124 private Set<String> getLangTags() {
125 if (langtags == null) {
126 langtags = ((JRELocaleProviderAdapter)LocaleProviderAdapter.forType(type)).getLanguageTagSet("CurrencyNames");
127 }
128 return langtags;
129 }
130 }