001: /*
002: * Copyright (c) 1998-2004 Caucho Technology -- all rights reserved
003: *
004: * This file is part of Resin(R) Open Source
005: *
006: * Each copy or derived work must preserve the copyright notice and this
007: * notice unmodified.
008: *
009: * Resin Open Source is free software; you can redistribute it and/or modify
010: * it under the terms of the GNU General Public License as published by
011: * the Free Software Foundation; either version 2 of the License, or
012: * (at your option) any later version.
013: *
014: * Resin Open Source is distributed in the hope that it will be useful,
015: * but WITHOUT ANY WARRANTY; without even the implied warranty of
016: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
017: * of NON-INFRINGEMENT. See the GNU General Public License for more
018: * details.
019: *
020: * You should have received a copy of the GNU General Public License
021: * along with Resin Open Source; if not, write to the
022: * Free SoftwareFoundation, Inc.
023: * 59 Temple Place, Suite 330
024: * Boston, MA 02111-1307 USA
025: *
026: * @author Sam
027: */
028:
029: package com.caucho.widget;
030:
031: import com.caucho.util.L10N;
032:
033: import java.util.HashMap;
034: import java.util.Locale;
035: import java.util.Map;
036: import java.util.logging.Logger;
037:
038: /**
039: * A locale String maps locales to String
040: */
041: public class LocaleString {
042: private static L10N L = new L10N(LocaleString.class);
043:
044: static protected final Logger log = Logger
045: .getLogger(LocaleString.class.getName());
046:
047: private static ThreadLocal _threadLocale = new ThreadLocal<Locale>();
048:
049: private Locale _locale;
050:
051: private String _text = null; // the text for _locale
052:
053: private String _anyText = null; // the first item in _textMap
054:
055: // any locale-->text mappings other than _locale --> _text
056: private HashMap<Locale, String> _textMap;
057:
058: /**
059: * Set the default locale to use for this thread when using
060: * the getValue() method.
061: */
062: public static void setThreadLocale(Locale locale) {
063: _threadLocale.set(locale);
064: }
065:
066: public static LocaleString add(LocaleString localeString,
067: LocaleString value) {
068: if (localeString == null)
069: localeString = new LocaleString();
070:
071: localeString.add(value);
072:
073: return localeString;
074: }
075:
076: public static LocaleString add(LocaleString localeString,
077: String value) {
078: if (localeString == null)
079: localeString = new LocaleString();
080:
081: localeString.addText(value);
082:
083: return localeString;
084: }
085:
086: public static LocaleString add(LocaleString localeString,
087: Locale locale, String value) {
088: if (localeString == null)
089: localeString = new LocaleString();
090:
091: localeString.put(locale, value);
092:
093: return localeString;
094: }
095:
096: public static String get(LocaleString localeString, Locale locale) {
097: return localeString == null ? null : localeString.get(locale);
098: }
099:
100: public static String get(LocaleString localeString) {
101: return localeString == null ? null : localeString.getValue();
102: }
103:
104: public LocaleString() {
105: setLocale(null);
106: }
107:
108: /**
109: * Construct and set the default locale.
110: */
111: public LocaleString(Locale locale) {
112: setLocale(locale);
113: }
114:
115: /**
116: * Construct and set the text for the default locale.
117: */
118: public LocaleString(String text) {
119: setLocale(null);
120: addText(text);
121: }
122:
123: /**
124: * Construct, set the default locale, and set the text for the default locale.
125: */
126: public LocaleString(Locale locale, String text) {
127: setLocale(locale);
128: addText(text);
129: }
130:
131: /**
132: * Set the default locale for text set with addText, the default is
133: * the platform default.
134: */
135: public void setLocale(Locale locale) {
136: if (locale == null) {
137: String lang = System.getProperty("user.language");
138: String country = System.getProperty("user.region");
139:
140: if (lang != null && country != null)
141: locale = new Locale(lang, country);
142: else if (lang != null)
143: locale = new Locale(lang);
144: else
145: locale = Locale.ENGLISH;
146: }
147:
148: _locale = locale;
149: }
150:
151: public Locale getLocale() {
152: return _locale;
153: }
154:
155: /**
156: * Convert the xml style <i>lang</i> to a {@link java.util.Locale}
157: * and then call {@link setLocale(Locale)}.
158: */
159: public void setLang(String lang) {
160: int index = lang.indexOf('-');
161:
162: if (index > -1) {
163: String language = lang.substring(0, index);
164: String country = lang.substring(index + 1);
165: setLocale(new Locale(language, country));
166: } else
167: setLocale(new Locale(lang));
168: }
169:
170: public void addText(String text) {
171: _text = text;
172: }
173:
174: public void put(Locale locale, String text) {
175: if (locale == null)
176: _text = text;
177: else {
178: if (locale.equals(_locale))
179: _text = text;
180: else {
181: if (_textMap == null) {
182: _textMap = new HashMap<Locale, String>();
183: _anyText = text;
184: }
185:
186: _textMap.put(locale, text);
187: }
188: }
189: }
190:
191: /**
192: * Return the most specific text available.
193: * <ul>
194: * <li>the text for the thread locale set with setThreadLocale()
195: * <li>the text for the thread locale without variant
196: * <li>the text for the thread locale wthout variant or country
197: * <li>the text for the default locale
198: * <li>any text available
199: * </ul>
200: */
201: public String getValue() {
202: Locale locale = (Locale) _threadLocale.get();
203:
204: return get(locale);
205: }
206:
207: /**
208: * Return the most specific text available.
209: * <ul>
210: * <li>the text that matches the full locale
211: * <li>the text that matches the locale without variant
212: * <li>the text that matches the locale without variant or country
213: * <li>the text for the default locale
214: * <li>any text available
215: * </ul>
216: */
217: public String get(Locale locale) {
218: if (locale == null) {
219: if (_text != null)
220: return _text;
221: else if (_anyText != null)
222: return _anyText;
223: else
224: return null;
225: }
226:
227: String text = null;
228:
229: if (_text != null && locale.equals(_locale))
230: text = _text;
231: else if (_textMap != null)
232: text = _textMap.get(locale);
233:
234: if (text != null)
235: return text;
236:
237: Locale reducedLocale = reduceLocale(locale);
238:
239: return get(reducedLocale);
240: }
241:
242: /**
243: * Add the strings from another locale to this locale.
244: * In the case of duplicate locales, the current values are overridden
245: * by the new values
246: */
247: public void add(LocaleString localeString) {
248: if (localeString._text != null)
249: put(localeString._locale, localeString._text);
250:
251: if (localeString._textMap != null) {
252: for (Map.Entry<Locale, String> entry : localeString._textMap
253: .entrySet()) {
254: put(entry.getKey(), entry.getValue());
255: }
256: }
257: }
258:
259: private static Locale reduceLocale(Locale locale) {
260: String language = locale.getLanguage();
261: String country = locale.getCountry();
262: String variant = locale.getVariant();
263:
264: if (variant.length() > 0)
265: return new Locale(language, country);
266: else if (country.length() > 0)
267: return new Locale(language);
268: else
269: return null;
270: }
271:
272: public String toString() {
273: return getValue();
274: }
275: }
|