1 /*
2 * Copyright (c) 1999, 2015, 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.io.IOException;
29 import java.text.BreakIterator;
30 import java.text.spi.BreakIteratorProvider;
31 import java.util.Locale;
32 import java.util.MissingResourceException;
33 import java.util.Objects;
34 import java.util.Set;
35
36 /**
37 * Concrete implementation of the {@link java.text.spi.BreakIteratorProvider
38 * BreakIteratorProvider} class for the JRE LocaleProviderAdapter.
39 *
40 * @author Naoto Sato
41 * @author Masayoshi Okutsu
42 */
43 public class BreakIteratorProviderImpl extends BreakIteratorProvider
44 implements AvailableLanguageTags {
45
46 private static final int CHARACTER_INDEX = 0;
47 private static final int WORD_INDEX = 1;
48 private static final int LINE_INDEX = 2;
49 private static final int SENTENCE_INDEX = 3;
50
51 private final LocaleProviderAdapter.Type type;
52 private final Set<String> langtags;
53
54 public BreakIteratorProviderImpl(LocaleProviderAdapter.Type type, Set<String> langtags) {
55 this.type = type;
56 this.langtags = langtags;
57 }
58
59 /**
60 * Returns an array of all locales for which this locale service provider
61 * can provide localized objects or names.
62 *
63 * @return An array of all locales for which this locale service provider
64 * can provide localized objects or names.
65 */
66 @Override
67 public Locale[] getAvailableLocales() {
68 return LocaleProviderAdapter.toLocaleArray(langtags);
69 }
70
71 /**
72 * Returns a new <code>BreakIterator</code> instance
73 * for <a href="../BreakIterator.html#word">word breaks</a>
74 * for the given locale.
75 * @param locale the desired locale
76 * @return A break iterator for word breaks
77 * @exception NullPointerException if <code>locale</code> is null
78 * @exception IllegalArgumentException if <code>locale</code> isn't
79 * one of the locales returned from
80 * {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()
81 * getAvailableLocales()}.
82 * @see java.text.BreakIterator#getWordInstance(java.util.Locale)
83 */
84 @Override
85 public BreakIterator getWordInstance(Locale locale) {
86 return getBreakInstance(locale,
87 WORD_INDEX,
88 "WordData",
89 "WordDictionary");
90 }
91
92 /**
93 * Returns a new <code>BreakIterator</code> instance
94 * for <a href="../BreakIterator.html#line">line breaks</a>
95 * for the given locale.
96 * @param locale the desired locale
97 * @return A break iterator for line breaks
98 * @exception NullPointerException if <code>locale</code> is null
99 * @exception IllegalArgumentException if <code>locale</code> isn't
100 * one of the locales returned from
101 * {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()
102 * getAvailableLocales()}.
103 * @see java.text.BreakIterator#getLineInstance(java.util.Locale)
104 */
105 @Override
106 public BreakIterator getLineInstance(Locale locale) {
107 return getBreakInstance(locale,
108 LINE_INDEX,
109 "LineData",
110 "LineDictionary");
111 }
112
113 /**
114 * Returns a new <code>BreakIterator</code> instance
115 * for <a href="../BreakIterator.html#character">character breaks</a>
116 * for the given locale.
117 * @param locale the desired locale
118 * @return A break iterator for character breaks
119 * @exception NullPointerException if <code>locale</code> is null
120 * @exception IllegalArgumentException if <code>locale</code> isn't
121 * one of the locales returned from
122 * {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()
123 * getAvailableLocales()}.
124 * @see java.text.BreakIterator#getCharacterInstance(java.util.Locale)
125 */
126 @Override
127 public BreakIterator getCharacterInstance(Locale locale) {
128 return getBreakInstance(locale,
129 CHARACTER_INDEX,
130 "CharacterData",
131 "CharacterDictionary");
132 }
133
134 /**
135 * Returns a new <code>BreakIterator</code> instance
136 * for <a href="../BreakIterator.html#sentence">sentence breaks</a>
137 * for the given locale.
138 * @param locale the desired locale
139 * @return A break iterator for sentence breaks
140 * @exception NullPointerException if <code>locale</code> is null
141 * @exception IllegalArgumentException if <code>locale</code> isn't
142 * one of the locales returned from
143 * {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()
144 * getAvailableLocales()}.
145 * @see java.text.BreakIterator#getSentenceInstance(java.util.Locale)
146 */
147 @Override
148 public BreakIterator getSentenceInstance(Locale locale) {
149 return getBreakInstance(locale,
150 SENTENCE_INDEX,
151 "SentenceData",
152 "SentenceDictionary");
153 }
154
155 private BreakIterator getBreakInstance(Locale locale,
156 int type,
157 String dataName,
158 String dictionaryName) {
159 Objects.requireNonNull(locale);
160
161 LocaleResources lr = LocaleProviderAdapter.forJRE().getLocaleResources(locale);
162 String[] classNames = (String[]) lr.getBreakIteratorInfo("BreakIteratorClasses");
163 String dataFile = (String) lr.getBreakIteratorInfo(dataName);
164
165 try {
166 switch (classNames[type]) {
167 case "RuleBasedBreakIterator":
168 return new RuleBasedBreakIterator(
169 lr.getBreakIteratorDataModule(), dataFile);
170 case "DictionaryBasedBreakIterator":
171 String dictionaryFile = (String) lr.getBreakIteratorInfo(dictionaryName);
172 return new DictionaryBasedBreakIterator(
173 lr.getBreakIteratorDataModule(), dataFile, dictionaryFile);
174 default:
175 throw new IllegalArgumentException("Invalid break iterator class \"" +
176 classNames[type] + "\"");
177 }
178 } catch (IOException | MissingResourceException | IllegalArgumentException e) {
179 throw new InternalError(e.toString(), e);
180 }
181 }
182
183 @Override
184 public Set<String> getAvailableLanguageTags() {
185 return langtags;
186 }
187
188 @Override
189 public boolean isSupportedLocale(Locale locale) {
190 return LocaleProviderAdapter.forType(type).isSupportedProviderLocale(locale, langtags);
191 }
192 }