1 /*
2 * Copyright (c) 1999, 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 /*
27 *
28 * (C) Copyright Taligent, Inc. 1996, 1997 - All Rights Reserved
29 * (C) Copyright IBM Corp. 1996 - 2002 - All Rights Reserved
30 *
31 * The original version of this source code and documentation
32 * is copyrighted and owned by Taligent, Inc., a wholly-owned
33 * subsidiary of IBM. These materials are provided under terms
34 * of a License Agreement between Taligent and Sun. This technology
35 * is protected by multiple US and International patents.
36 *
37 * This notice and attribution to Taligent may not be removed.
38 * Taligent is a registered trademark of Taligent, Inc.
39 */
40
41 package sun.util.locale.provider;
42
43 import java.text.Collator;
44 import java.text.ParseException;
45 import java.text.RuleBasedCollator;
46 import java.text.spi.CollatorProvider;
47 import java.util.Locale;
48 import java.util.Set;
49
50 /**
51 * Concrete implementation of the
52 * {@link java.text.spi.CollatorProvider CollatorProvider} class
53 * for the JRE LocaleProviderAdapter.
54 */
55 public class CollatorProviderImpl extends CollatorProvider implements AvailableLanguageTags {
56 private final LocaleProviderAdapter.Type type;
57 private Set<String> langtags;
58
59 public CollatorProviderImpl(LocaleProviderAdapter.Type type) {
60 this.type = type;
61 }
62
63 /**
64 * Returns an array of all locales for which this locale service provider
65 * can provide localized objects or names.
66 *
67 * @return An array of all locales for which this locale service provider
68 * can provide localized objects or names.
69 */
70 @Override
71 public Locale[] getAvailableLocales() {
72 return LocaleProviderAdapter.toLocaleArray(getLangTags());
73 }
74
75 @Override
76 public boolean isSupportedLocale(Locale locale) {
77 return LocaleProviderAdapter.isSupportedLocale(locale, type, getLangTags());
78 }
79
80 /**
81 * Returns a new <code>Collator</code> instance for the specified locale.
82 * @param locale the desired locale.
83 * @return the <code>Collator</code> for the desired locale.
84 * @exception NullPointerException if
85 * <code>locale</code> is null
86 * @exception IllegalArgumentException if <code>locale</code> isn't
87 * one of the locales returned from
88 * {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()
89 * getAvailableLocales()}.
90 * @see java.text.Collator#getInstance(java.util.Locale)
91 */
92 @Override
93 public Collator getInstance(Locale locale) {
94 if (locale == null) {
95 throw new NullPointerException();
96 }
97
98 Collator result = null;
99
100 // Load the resource of the desired locale from resource
101 // manager.
102 String colString = LocaleProviderAdapter.forType(type).getLocaleResources(locale).getCollationData();
103 try
104 {
105 result = new RuleBasedCollator(CollationRules.DEFAULTRULES +
106 colString);
107 }
108 catch(ParseException foo)
109 {
110 // predefined tables should contain correct grammar
111 try {
112 result = new RuleBasedCollator(CollationRules.DEFAULTRULES);
113 } catch (ParseException bar) {
114 // the default rules should always be parsable.
115 throw new InternalError(bar);
116 }
117 }
118 // Now that RuleBasedCollator adds expansions for pre-composed characters
119 // into their decomposed equivalents, the default collators don't need
120 // to have decomposition turned on. Laura, 5/5/98, bug 4114077
121 result.setDecomposition(Collator.NO_DECOMPOSITION);
122
123 return (Collator)result.clone();
124 }
125
126 @Override
127 public Set<String> getAvailableLanguageTags() {
128 return getLangTags();
129 }
130
131 private Set<String> getLangTags() {
132 if (langtags == null) {
133 langtags = ((JRELocaleProviderAdapter)LocaleProviderAdapter.forType(type)).getLanguageTagSet("CollationData");
134 }
135 return langtags;
136 }
137 }