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1 package com.tonbeller.tbutils.res;
2
3 import java.io.File  ;
4 import java.io.FileInputStream ;
5 import java.io.FileNotFoundException ;
6 import java.io.IOException ;
7 import java.util.HashMap ;
8 import java.util.Locale ;
9 import java.util.Map ;
10 import java.util.MissingResourceException ;
11 import java.util.Properties ;
12 import java.util.ResourceBundle ;
13 import java.util.StringTokenizer ;
14
15 import org.apache.log4j.Logger;
16
17
58 public class ResourcesFactory {
59
63 public static final String INITIAL_PROVIDER = "tbeller.InitialResourceProvider";
64
65 public static final String USE_JNDI_PROVIDER = "tbeller.usejndi";
67
68 public static final String TBELLER_BUNDLES = "tbeller.bundles";
69
70 public static final String TBELLER_PROPERTIES = "tbeller.properties";
71
72 public static final String TBELLER_HOME = "tbeller.home";
74
75 public static final String TBELLER_LOCALE = "tbeller.locale";
76
77 private static Logger logger = Logger.getLogger(ResourcesFactory.class);
78
79 Map locale2providerMap = new HashMap ();
80
81 File homeDir;
82
83 Locale fixedLocale;
84
85 String [] properties;
86
87 String [] bundles;
88
89 static ResourcesFactory instance = new ResourcesFactory();
90
91 private ResourcesFactory() {
92 initialize();
93 }
94
95 public static ResourcesFactory instance() {
96 return instance;
97 }
98
99
105 Resources getResources(Locale requestLocale, String bundleName) {
106 Locale locale = fixedLocale;
107 if (locale == null)
108 locale = requestLocale;
109 if (locale == null)
110 locale = Locale.getDefault();
111
112 CompositeResourceProvider crp = new CompositeResourceProvider();
113 ResourceProvider baseProvider = getProvider(locale);
114 crp.add(baseProvider);
115
116 ResourceProvider bundleProvider = getProvider(locale, bundleName);
117 if (bundleProvider != null)
118 crp.add(bundleProvider);
119
120 return new Resources(crp, locale, homeDir);
121 }
122
123
129 public Locale getFixedLocale() {
130 return fixedLocale;
131 }
132
133
137 static ResourceProvider getProvider(Locale locale, String bundleName) {
138 if (bundleName == null)
139 return null;
140 try {
141 ResourceBundle resb = ResourceBundle.getBundle(bundleName, locale);
142 return new BundleResourceProvider(bundleName, resb);
143 } catch (MissingResourceException e) {
144 return null;
145 }
146 }
147
148 ResourceProvider getProvider(Locale locale) {
149 String key = locale.getLanguage() + locale.getCountry() + locale.getVariant();
150 ResourceProvider p = (ResourceProvider) locale2providerMap.get(key);
151 if (p != null)
152 return p;
153 p = createProvider(locale);
154 locale2providerMap.put(key, p);
155 return p;
156 }
157
158 void initialize() {
159 ResourceProvider p = getInitialProvider();
160 try {
161 initialize(p);
162 } finally {
163 p.close();
164 }
165 }
166
167 private ResourceProvider getInitialProvider() {
168 ResourceProvider m = new SimpleInitialProvider();
169 String clazz = m.getString(INITIAL_PROVIDER);
170 if (clazz != null) {
171 try {
172 return (ResourceProvider) Class.forName(clazz).newInstance();
173 } catch (Exception e) {
174 logger.error("could not instantiate " + clazz, e);
175 }
176 }
177 if ("false".equals(m.getString(USE_JNDI_PROVIDER)))
178 return new SimpleInitialProvider();
179 return new JNDIInitialProvider();
180 }
181
182 void initialize(ResourceProvider resp) {
183 locale2providerMap.clear();
184
185 ResourceProvider p = new ReplacingResourceProvider(resp);
186 bundles = tokenize(p.getString(TBELLER_BUNDLES));
187
188 CompositeResourceProvider c = new CompositeResourceProvider();
190 c.add(p);
191 addBundleProviders(Locale.getDefault(), c);
192 p = new ReplacingResourceProvider(c);
193
194 initHome(p);
195 initLocale(p);
196 properties = tokenize(p.getString(TBELLER_PROPERTIES));
197 }
198
199 String [] tokenize(String s) {
200 if (s == null)
201 return new String [0];
202 StringTokenizer st = new StringTokenizer (s);
203 String [] a = new String [st.countTokens()];
204 for (int i = 0; i < a.length; i++)
205 a[i] = st.nextToken();
206 return a;
207 }
208
209 CompositeResourceProvider createProvider(Locale locale) {
210 CompositeResourceProvider c = new CompositeResourceProvider();
211 c.add(new SystemResourceProvider());
212 addPropertyProviders(locale, c);
213 addBundleProviders(locale, c);
214 return c;
215 }
216
217
221 private void addPropertyProviders(Locale locale, CompositeResourceProvider c) {
222 for (int i = 0; i < properties.length; i++) {
223 File f = propertyFile(properties[i], locale);
224 Properties props = new Properties ();
225 FileInputStream fis = null;
226 try {
227 fis = new FileInputStream (f);
228 props.load(fis);
229 c.add(new PropertyResourceProvider(f.getCanonicalPath(), props));
230 } catch (FileNotFoundException e) {
231 if (logger.isInfoEnabled())
233 logger.info("optional property file not found: " + f.getAbsolutePath());
234 } catch (IOException e) {
235 logger.error("error loading " + f.getAbsolutePath(), e);
236 } finally {
237 try {
238 if (fis != null)
239 fis.close();
240 } catch (IOException e2) {
241 logger.error("error closing " + f.getAbsolutePath(), e2);
242 }
243 }
244 }
245 }
246
247 File propertyFile(String propertyName, Locale locale) {
248 String fn;
249 File f = new File (propertyName);
250 if (f.isAbsolute())
251 fn = f.getAbsolutePath();
252 else
253 fn = homeDir.getAbsolutePath() + File.separator + propertyName;
254 return findFile(fn, locale);
255 }
256
257
261 private void addBundleProviders(Locale locale, CompositeResourceProvider c) {
262 for (int i = 0; i < bundles.length; i++) {
263 try {
264 ResourceBundle rb = ResourceBundle.getBundle(bundles[i], locale);
265 c.add(new BundleResourceProvider(bundles[i], rb));
266 } catch (MissingResourceException e) {
267 if (logger.isInfoEnabled())
269 logger.info("optional resource bundle not found: " + bundles[i]);
270 }
271 }
272 }
273
274 File findFile(String path, Locale locale) {
275 String ext = "";
276
277 int pos = path.lastIndexOf('.');
278 if (pos >= 0)
279 ext = path.substring(pos, path.length()); path = path.substring(0, pos);
281
282 File f = new File (path + "_" + locale.getLanguage() + "_" + locale.getCountry() + ext);
283 if (f.exists())
284 return f;
285
286 f = new File (path + "_" + locale.getLanguage() + ext);
287 if (f.exists())
288 return f;
289
290 return new File (path + ext);
291 }
292
293 void initHome(ResourceProvider p) {
294 String dir = p.getString(TBELLER_HOME);
295 if (dir == null || dir.trim().length() == 0)
296 dir = System.getProperty("user.home") + File.separator + ".tonbeller";
297 homeDir = new File (dir);
298 homeDir.mkdirs();
299 }
300
301 void initLocale(ResourceProvider p) {
302 fixedLocale = null;
303 String lang = p.getString(TBELLER_LOCALE);
304 if (lang != null) {
305 lang = lang.trim();
306 if (lang.length() == 2)
307 fixedLocale = new Locale (lang, lang.toUpperCase());
308 else if (lang.length() == 5) {
309 String l = lang.substring(0, 2);
310 String c = lang.substring(3, 5);
311 fixedLocale = new Locale (l, c);
312 } else if ("browser".equals(lang))
313 ; }
316 }
317
318 } |
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