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1
31
32 package org.opencms.i18n;
33
34 import org.opencms.util.CmsFileUtil;
35
36 import java.io.File  ;
37 import java.io.FileInputStream ;
38 import java.io.IOException ;
39 import java.io.InputStream ;
40 import java.net.URL ;
41 import java.util.HashMap ;
42 import java.util.Locale ;
43 import java.util.Map ;
44 import java.util.MissingResourceException ;
45 import java.util.ResourceBundle ;
46
47
70 public final class CmsResourceBundleLoader {
71
72
77 private static class BundleKey {
78
79 private String m_baseName;
80 private int m_hashcode;
81 private Locale m_locale;
82
83
86 BundleKey() {
87
88 }
90
91
97 BundleKey(String s, Locale l) {
98
99 set(s, l);
100 }
101
102
105 public boolean equals(Object o) {
106
107 if (!(o instanceof BundleKey)) {
108 return false;
109 }
110 BundleKey key = (BundleKey)o;
111 return m_hashcode == key.m_hashcode && m_baseName.equals(key.m_baseName) && m_locale.equals(key.m_locale);
112 }
113
114
117 public int hashCode() {
118
119 return m_hashcode;
120 }
121
122
125 public String toString() {
126
127 return m_baseName + "_" + m_locale;
128 }
129
130
136 void set(String s, Locale l) {
137
138 m_baseName = s;
139 m_locale = l;
140 m_hashcode = m_baseName.hashCode() ^ m_locale.hashCode();
141 }
142 }
143
144
145 private static Map m_bundleCache;
146
147
148 private static Locale m_lastDefaultLocale;
149
150
151 private static BundleKey m_lookupKey = new BundleKey();
152
153
154 private static final Object NULL_ENTRY = new Object ();
155
156
159 private CmsResourceBundleLoader() {
160
161 }
163
164
167 public static synchronized void flushBundleCache() {
168
169 m_bundleCache = new HashMap ();
170 }
171
172
210 public static synchronized ResourceBundle getBundle(String baseName, Locale locale) {
213
214 Locale defaultLocale = Locale.getDefault();
217 if (defaultLocale != m_lastDefaultLocale) {
218 m_bundleCache = new HashMap ();
219 m_lastDefaultLocale = defaultLocale;
220 }
221
222 m_lookupKey.set(baseName, locale);
224
225 Object obj = m_bundleCache.get(m_lookupKey);
226
227 if (obj instanceof CmsResourceBundle) {
228 return (CmsResourceBundle)obj;
229 } else if (obj == NULL_ENTRY) {
230 } else {
232 boolean wantBase = locale.equals(defaultLocale);
235 CmsResourceBundle bundle = tryBundle(baseName, locale, wantBase);
236
237 if (bundle == null && !locale.equals(defaultLocale)) {
239 bundle = tryBundle(baseName, defaultLocale, true);
240 }
241
242 BundleKey key = new BundleKey(baseName, locale);
243 if (bundle == null) {
244 m_bundleCache.put(key, NULL_ENTRY);
246 } else {
247 m_bundleCache.put(key, bundle);
249 return bundle;
250 }
251 }
252
253 return ResourceBundle.getBundle(baseName, locale);
256 }
257
258
264 private static CmsResourceBundle tryBundle(String localizedName) {
265
266 CmsResourceBundle bundle = null;
267
268 try {
269
270 InputStream is = null;
271 String resourceName = localizedName.replace('.', '/') + ".properties";
272 URL url = CmsResourceBundleLoader.class.getClassLoader().getResource(resourceName);
273
274 if (url != null) {
275 String path = CmsFileUtil.normalizePath(url);
276 File file = new File (path);
277 try {
278 is = new FileInputStream (file);
283 } catch (IOException ex) {
284 is = CmsResourceBundleLoader.class.getClassLoader().getResourceAsStream(resourceName);
286 }
287 }
288 if (is != null) {
289 bundle = new CmsResourceBundle(is);
290 }
291 } catch (IOException ex) {
292 MissingResourceException mre = new MissingResourceException (
294 "Failed to load bundle '" + localizedName + "'",
295 localizedName,
296 "");
297 mre.initCause(ex);
298 throw mre;
299 }
300
301 return bundle;
302 }
303
304
314 private static CmsResourceBundle tryBundle(String baseName, Locale locale, boolean wantBase) {
315
316 String language = locale.getLanguage();
317 String country = locale.getCountry();
318 String variant = locale.getVariant();
319
320 int baseLen = baseName.length();
321
322 StringBuffer sb = new StringBuffer (baseLen + variant.length() + 7);
325
326 sb.append(baseName);
327
328 if (language.length() > 0) {
329 sb.append('_');
330 sb.append(language);
331
332 if (country.length() > 0) {
333 sb.append('_');
334 sb.append(country);
335
336 if (variant.length() > 0) {
337 sb.append('_');
338 sb.append(variant);
339 }
340 }
341 }
342
343 String bundleName = sb.toString();
346 CmsResourceBundle first = null; CmsResourceBundle last = null;
349 while (true) {
350 CmsResourceBundle foundBundle = tryBundle(bundleName);
351 if (foundBundle != null) {
352 if (first == null) {
353 first = foundBundle;
354 }
355
356 if (last != null) {
357 last.setParent(foundBundle);
358 }
359 foundBundle.setLocale(locale);
360
361 last = foundBundle;
362 }
363 int idx = bundleName.lastIndexOf('_');
364 if (idx > baseLen || (idx == baseLen && (first != null || wantBase))) {
367 bundleName = bundleName.substring(0, idx);
368 } else {
369 break;
370 }
371 }
372
373 return first;
374 }
375 }
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