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1
43 package net.jforum.util;
44
45 import java.io.FileInputStream  ;
46 import java.io.IOException ;
47 import java.text.MessageFormat ;
48 import java.util.ArrayList ;
49 import java.util.HashMap ;
50 import java.util.List ;
51 import java.util.Map ;
52 import java.util.Properties ;
53
54 import net.jforum.SessionFacade;
55 import net.jforum.entities.UserSession;
56 import net.jforum.util.preferences.ConfigKeys;
57 import net.jforum.util.preferences.SystemGlobals;
58
59 import org.apache.log4j.Logger;
60
61
69 public class I18n
70 {
71 private static I18n classInstance = new I18n();
72 private static Map messagesMap = new HashMap ();
73 private static Properties localeNames = new Properties ();
74 private static String defaultName;
75 private static String baseDir;
76 private static List watching = new ArrayList ();
77 public static final String CANNOT_DELETE_GROUP = "CannotDeleteGroup";
78 public static final String CANNOT_DELETE_CATEGORY = "CannotDeleteCategory";
79 public static final String CANNOT_DELETE_BANNER = "CannotDeleteBanner";
80 private static final Logger logger = Logger.getLogger(I18n.class);
81
82 private I18n() {}
83
84
89 public static I18n getInstance()
90 {
91 return classInstance;
92 }
93
94
99 public static synchronized void load() throws IOException
100 {
101 baseDir = SystemGlobals.getApplicationResourceDir() + "/" + SystemGlobals.getValue(ConfigKeys.LOCALES_DIR);
102
103 loadLocales();
104
105 defaultName = SystemGlobals.getValue(ConfigKeys.I18N_DEFAULT_ADMIN);
106 load(defaultName, null);
107
108 String custom = SystemGlobals.getValue(ConfigKeys.I18N_DEFAULT);
109 if (!custom.equals(defaultName)) {
110 load(custom, defaultName);
111 defaultName = custom;
112 }
113 }
114
115 public static void changeBoardDefault(String newDefaultLanguage) throws Exception
116 {
117 load(newDefaultLanguage, SystemGlobals.getValue(ConfigKeys.I18N_DEFAULT_ADMIN));
118 defaultName = newDefaultLanguage;
119 }
120
121 private static void loadLocales() throws IOException
122 {
123 localeNames.load(new FileInputStream (baseDir + SystemGlobals.getValue(ConfigKeys.LOCALES_NAMES)));
124 }
125
126 static void load(String localeName, String mergeWith) throws IOException
127 {
128 load(localeName, mergeWith, false);
129 }
130
131 static void load(String localeName, String mergeWith, boolean force) throws IOException
132 {
133 if (!force && (localeName == null || localeName.trim().equals("") || I18n.contains(localeName))) {
134 return;
135 }
136
137 if (localeNames.size() == 0) {
138 loadLocales();
139 }
140
141 Properties p = new Properties ();
142
143 if (mergeWith != null) {
144 if (!I18n.contains(mergeWith)) {
145 load(mergeWith, null);
146 }
147
148 p.putAll((Properties ) messagesMap.get(mergeWith));
149 }
150
151 p.load(new FileInputStream (baseDir + localeNames.getProperty(localeName)));
152 messagesMap.put(localeName, p);
153
154 watchForChanges(localeName);
155 }
156
157
165 public static void load(String localeName) throws IOException
166 {
167 load(localeName, SystemGlobals.getValue(ConfigKeys.I18N_DEFAULT));
168 }
169
170 public static void reset()
171 {
172 messagesMap = new HashMap ();
173 localeNames = new Properties ();
174 defaultName = null;
175 }
176
177 private static void watchForChanges(final String localeName)
178 {
179 if (!watching.contains(localeName)) {
180 watching.add(localeName);
181
182 int fileChangesDelay = SystemGlobals.getIntValue(ConfigKeys.FILECHANGES_DELAY);
183
184 if (fileChangesDelay > 0) {
185 FileMonitor.getInstance().addFileChangeListener(new FileChangeListener() {
186
189 public void fileChanged(String filename)
190 {
191 logger.info("Reloading i18n for " + localeName);
192
193 try {
194 I18n.load(localeName, SystemGlobals.getValue(ConfigKeys.I18N_DEFAULT), true);
195 }
196 catch (IOException e) {
197 logger.warn(e);
198 e.printStackTrace();
199 }
200 }
201 }, baseDir + localeNames.getProperty(localeName), fileChangesDelay);
202 }
203 }
204 }
205
206
219 public static String getMessage(String localeName, String messageName, Object params[])
220 {
221 return MessageFormat.format(((Properties ) messagesMap.get(localeName)).getProperty(messageName), params);
222 }
223
224
227 public static String getMessage(String messageName, Object params[])
228 {
229 String lang = "";
230 UserSession us = SessionFacade.getUserSession();
231 if (us != null && us.getLang() != null) {
232 lang = us.getLang();
233 }
234
235 if ("".equals(lang)) {
236 return getMessage(defaultName, messageName, params);
237 }
238
239 return getMessage(lang, messageName, params);
240 }
241
242
250 public static String getMessage(String localeName, String m)
251 {
252 if (!messagesMap.containsKey(localeName)) {
253 try {
254 load(localeName);
255 }
256 catch (IOException e) {
257 logger.warn("Error loading locale " + localeName + ". " + e.getMessage());
258 return null;
259 }
260 }
261
262 return (((Properties ) messagesMap.get(localeName)).getProperty(m));
263 }
264
265 public static String getMessage(String m)
266 {
267 return getMessage(getUserLanguage(), m);
268 }
269
270 public static String getMessage(String m, UserSession us)
271 {
272 if (us == null || us.getLang() == null || us.getLang().equals("")) {
273 return getMessage(defaultName, m);
274 }
275
276 return getMessage(us.getLang(), m);
277 }
278
279
285 public static String getUserLanguage()
286 {
287 UserSession us = SessionFacade.getUserSession();
288
289 if (us == null || us.getLang() == null || us.getLang().trim().equals("")) {
290 return defaultName;
291 }
292
293 return us.getLang();
294 }
295
296
302 public static boolean contains(String language)
303 {
304 return messagesMap.containsKey(language);
305 }
306
307
314 public static boolean languageExists(String language)
315 {
316 return (localeNames.getProperty(language) != null);
317 }
318 } |
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