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1 | package be.nikiroo.utils.resources; |
2 | ||
3 | import java.io.BufferedWriter; | |
4 | import java.io.File; | |
5 | import java.io.FileInputStream; | |
6 | import java.io.FileOutputStream; | |
7 | import java.io.IOException; | |
8 | import java.io.InputStreamReader; | |
9 | import java.io.OutputStreamWriter; | |
10 | import java.io.Reader; | |
ec1f3444 NR |
11 | import java.io.Writer; |
12 | import java.lang.reflect.Field; | |
13 | import java.util.ArrayList; | |
14 | import java.util.List; | |
15 | import java.util.Locale; | |
16 | import java.util.MissingResourceException; | |
17 | import java.util.PropertyResourceBundle; | |
18 | import java.util.ResourceBundle; | |
19 | ||
ec1f3444 NR |
20 | /** |
21 | * This class encapsulate a {@link ResourceBundle} in UTF-8. It only allows to | |
22 | * retrieve values associated to an enumeration, and allows some additional | |
23 | * methods. | |
24 | * | |
25 | * @author niki | |
26 | * | |
27 | * @param <E> | |
28 | * the enum to use to get values out of this class | |
29 | */ | |
30 | public class Bundle<E extends Enum<E>> { | |
31 | protected Class<E> type; | |
32 | protected Enum<?> name; | |
33 | private ResourceBundle map; | |
34 | ||
35 | /** | |
36 | * Create a new {@link Bundles} of the given name. | |
37 | * | |
38 | * @param type | |
39 | * a runtime instance of the class of E | |
40 | * | |
41 | * @param name | |
42 | * the name of the {@link Bundles} | |
43 | */ | |
44 | protected Bundle(Class<E> type, Enum<?> name) { | |
45 | this.type = type; | |
46 | this.name = name; | |
47 | setBundle(name, Locale.getDefault()); | |
48 | } | |
49 | ||
50 | /** | |
51 | * Return the value associated to the given id as a {@link String}. | |
52 | * | |
53 | * @param mame | |
54 | * the id of the value to get | |
55 | * | |
56 | * @return the associated value, or NULL if not found (not present in the | |
57 | * resource file) | |
58 | */ | |
59 | public String getString(E id) { | |
60 | return getStringX(id, ""); | |
61 | } | |
62 | ||
63 | /** | |
64 | * Return the value associated to the given id as a {@link String} suffixed | |
65 | * with the runtime value "_suffix" (that is, "_" and suffix). | |
66 | * | |
67 | * @param mame | |
68 | * the id of the value to get | |
69 | * @param suffix | |
70 | * the runtime suffix | |
71 | * | |
72 | * @return the associated value, or NULL if not found (not present in the | |
73 | * resource file) | |
74 | */ | |
75 | public String getStringX(E id, String suffix) { | |
76 | String key = id.name() | |
77 | + ((suffix == null || suffix.isEmpty()) ? "" : "_" | |
78 | + suffix.toUpperCase()); | |
79 | ||
80 | if (containsKey(key)) { | |
81 | return getString(key).trim(); | |
82 | } | |
83 | ||
84 | return null; | |
85 | } | |
86 | ||
87 | /** | |
88 | * Return the value associated to the given id as a {@link Boolean}. | |
89 | * | |
90 | * @param mame | |
91 | * the id of the value to get | |
92 | * | |
93 | * @return the associated value | |
94 | */ | |
95 | public Boolean getBoolean(E id) { | |
96 | String str = getString(id); | |
97 | if (str != null && str.length() > 0) { | |
98 | if (str.equalsIgnoreCase("true") || str.equalsIgnoreCase("on") | |
99 | || str.equalsIgnoreCase("yes")) | |
100 | return true; | |
101 | if (str.equalsIgnoreCase("false") || str.equalsIgnoreCase("off") | |
102 | || str.equalsIgnoreCase("no")) | |
103 | return false; | |
104 | ||
105 | } | |
106 | ||
107 | return null; | |
108 | } | |
109 | ||
110 | /** | |
111 | * Return the value associated to the given id as a {@link boolean}. | |
112 | * | |
113 | * @param mame | |
114 | * the id of the value to get | |
115 | * @param def | |
116 | * the default value when it is not present in the config file or | |
117 | * if it is not a boolean value | |
118 | * | |
119 | * @return the associated value | |
120 | */ | |
121 | public boolean getBoolean(E id, boolean def) { | |
122 | Boolean b = getBoolean(id); | |
123 | if (b != null) | |
124 | return b; | |
125 | ||
126 | return def; | |
127 | } | |
128 | ||
129 | /** | |
130 | * Return the value associated to the given id as an {@link Integer}. | |
131 | * | |
132 | * @param mame | |
133 | * the id of the value to get | |
134 | * | |
135 | * @return the associated value | |
136 | */ | |
137 | public Integer getInteger(E id) { | |
138 | try { | |
139 | return Integer.parseInt(getString(id)); | |
140 | } catch (Exception e) { | |
141 | } | |
142 | ||
143 | return null; | |
144 | } | |
145 | ||
146 | /** | |
147 | * Return the value associated to the given id as a {@link int}. | |
148 | * | |
149 | * @param mame | |
150 | * the id of the value to get | |
151 | * @param def | |
152 | * the default value when it is not present in the config file or | |
153 | * if it is not a int value | |
154 | * | |
155 | * @return the associated value | |
156 | */ | |
157 | public int getInteger(E id, int def) { | |
158 | Integer i = getInteger(id); | |
159 | if (i != null) | |
160 | return i; | |
161 | ||
162 | return def; | |
163 | } | |
164 | ||
165 | /** | |
166 | * Return the value associated to the given id as a {@link Character}. | |
167 | * | |
168 | * @param mame | |
169 | * the id of the value to get | |
170 | * | |
171 | * @return the associated value | |
172 | */ | |
173 | public char getChar(E id) { | |
174 | String s = getString(id).trim(); | |
175 | if (s.length() > 0) { | |
176 | return s.charAt(0); | |
177 | } | |
178 | ||
179 | return ' '; | |
180 | } | |
181 | ||
182 | /** | |
183 | * Create/update the .properties file. Will use the most likely candidate as | |
184 | * base if the file does not already exists and this resource is | |
185 | * translatable (for instance, "en_US" will use "en" as a base if the | |
186 | * resource is a translation file). | |
187 | * | |
188 | * @param path | |
189 | * the path where the .properties files are | |
190 | * | |
191 | * @throws IOException | |
192 | * in case of IO errors | |
193 | */ | |
194 | public void updateFile(String path) throws IOException { | |
195 | File file = getUpdateFile(path); | |
196 | ||
197 | BufferedWriter writer = new BufferedWriter(new OutputStreamWriter( | |
198 | new FileOutputStream(file), "UTF-8")); | |
199 | ||
200 | writeHeader(writer); | |
201 | writer.write("\n"); | |
202 | writer.write("\n"); | |
203 | ||
204 | for (Field field : type.getDeclaredFields()) { | |
205 | Meta meta = field.getAnnotation(Meta.class); | |
206 | if (meta != null) { | |
207 | E id = E.valueOf(type, field.getName()); | |
208 | String info = getMetaInfo(meta); | |
209 | ||
210 | if (info != null) { | |
211 | writer.write(info); | |
212 | writer.write("\n"); | |
213 | } | |
214 | ||
215 | writeValue(writer, id); | |
216 | } | |
217 | } | |
218 | ||
219 | writer.close(); | |
220 | } | |
221 | ||
222 | /** | |
223 | * Check if the internal map contains the given key. | |
224 | * | |
225 | * @param key | |
226 | * the key to check for | |
227 | * | |
228 | * @return true if it does | |
229 | */ | |
230 | protected boolean containsKey(String key) { | |
231 | try { | |
232 | map.getObject(key); | |
233 | return true; | |
234 | } catch (MissingResourceException e) { | |
235 | return false; | |
236 | } | |
237 | } | |
238 | ||
239 | /** | |
2cce3dcb NR |
240 | * Get the value for the given key if it exists in the internal map, or NULL |
241 | * if not. | |
ec1f3444 NR |
242 | * |
243 | * @param key | |
244 | * the key to check for | |
245 | * | |
2cce3dcb | 246 | * @return the value, or NULL |
ec1f3444 NR |
247 | */ |
248 | protected String getString(String key) { | |
249 | if (containsKey(key)) { | |
2cce3dcb | 250 | return map.getString(key); |
ec1f3444 NR |
251 | } |
252 | ||
253 | return null; | |
254 | } | |
255 | ||
256 | /** | |
257 | * Return formated, display-able information from the {@link Meta} field | |
258 | * given. Each line will always starts with a "#" character. | |
259 | * | |
260 | * @param meta | |
261 | * the {@link Meta} field | |
262 | * | |
263 | * @return the information to display or NULL if none | |
264 | */ | |
265 | protected String getMetaInfo(Meta meta) { | |
266 | String what = meta.what(); | |
267 | String where = meta.where(); | |
268 | String format = meta.format(); | |
269 | String info = meta.info(); | |
270 | ||
271 | int opt = what.length() + where.length() + format.length(); | |
272 | if (opt + info.length() == 0) | |
273 | return null; | |
274 | ||
275 | StringBuilder builder = new StringBuilder(); | |
276 | builder.append("# "); | |
277 | ||
278 | if (opt > 0) { | |
279 | builder.append("("); | |
280 | if (what.length() > 0) { | |
281 | builder.append("WHAT: " + what); | |
282 | if (where.length() + format.length() > 0) | |
283 | builder.append(", "); | |
284 | } | |
285 | ||
286 | if (where.length() > 0) { | |
287 | builder.append("WHERE: " + where); | |
288 | if (format.length() > 0) | |
289 | builder.append(", "); | |
290 | } | |
291 | ||
292 | if (format.length() > 0) { | |
293 | builder.append("FORMAT: " + format); | |
294 | } | |
295 | ||
296 | builder.append(")"); | |
297 | if (info.length() > 0) { | |
298 | builder.append("\n# "); | |
299 | } | |
300 | } | |
301 | ||
302 | builder.append(info); | |
303 | ||
304 | return builder.toString(); | |
305 | } | |
306 | ||
307 | /** | |
308 | * The display name used in the <tt>.properties file</tt>. | |
309 | * | |
310 | * @return the name | |
311 | */ | |
312 | protected String getBundleDisplayName() { | |
313 | return name.toString(); | |
314 | } | |
315 | ||
316 | /** | |
317 | * Write the header found in the configuration <tt>.properties</tt> file of | |
318 | * this {@link Bundles}. | |
319 | * | |
320 | * @param writer | |
321 | * the {@link Writer} to write the header in | |
322 | * | |
323 | * @throws IOException | |
324 | * in case of IO error | |
325 | */ | |
326 | protected void writeHeader(Writer writer) throws IOException { | |
327 | writer.write("# " + getBundleDisplayName() + "\n"); | |
328 | writer.write("#\n"); | |
329 | } | |
330 | ||
331 | /** | |
332 | * Write the given id to the config file, i.e., "MY_ID = my_curent_value" | |
333 | * followed by a new line | |
334 | * | |
335 | * @param writer | |
336 | * the {@link Writer} to write into | |
337 | * @param id | |
338 | * the id to write | |
339 | * | |
340 | * @throws IOException | |
341 | * in case of IO error | |
342 | */ | |
343 | protected void writeValue(Writer writer, E id) throws IOException { | |
344 | writeValue(writer, id.name(), getString(id)); | |
345 | } | |
346 | ||
347 | /** | |
348 | * Write the given data to the config file, i.e., "MY_ID = my_curent_value" | |
349 | * followed by a new line | |
350 | * | |
351 | * @param writer | |
352 | * the {@link Writer} to write into | |
353 | * @param id | |
354 | * the id to write | |
355 | * @param value | |
356 | * the id's value | |
357 | * | |
358 | * @throws IOException | |
359 | * in case of IO error | |
360 | */ | |
361 | protected void writeValue(Writer writer, String id, String value) | |
362 | throws IOException { | |
363 | writer.write(id); | |
364 | writer.write(" = "); | |
365 | ||
366 | if (value == null) { | |
367 | value = ""; | |
368 | } | |
369 | ||
370 | String[] lines = value.replaceAll("\\\t", "\\\\\\t").split("\n"); | |
371 | for (int i = 0; i < lines.length; i++) { | |
372 | writer.write(lines[i]); | |
373 | if (i < lines.length - 1) { | |
374 | writer.write("\\n\\"); | |
375 | } | |
376 | writer.write("\n"); | |
377 | } | |
378 | } | |
379 | ||
380 | /** | |
381 | * Return the source file for this {@link Bundles} from the given path. | |
382 | * | |
383 | * @param path | |
384 | * the path where the .properties files are | |
385 | * | |
386 | * @return the source {@link File} | |
387 | * | |
388 | * @throws IOException | |
389 | * in case of IO errors | |
390 | */ | |
391 | protected File getUpdateFile(String path) { | |
392 | return new File(path, name.name() + ".properties"); | |
393 | } | |
394 | ||
395 | /** | |
396 | * Change the currently used bundle. | |
397 | * | |
398 | * @param name | |
399 | * the name of the bundle to load | |
400 | * @param locale | |
401 | * the {@link Locale} to use | |
402 | */ | |
403 | protected void setBundle(Enum<?> name, Locale locale) { | |
404 | map = null; | |
405 | String dir = Bundles.getDirectory(); | |
406 | ||
407 | if (dir != null) { | |
408 | try { | |
409 | File file = getPropertyFile(dir, name.name(), locale); | |
410 | if (file != null) { | |
411 | Reader reader = new InputStreamReader(new FileInputStream( | |
412 | file), "UTF8"); | |
413 | map = new PropertyResourceBundle(reader); | |
414 | } | |
415 | } catch (IOException e) { | |
416 | e.printStackTrace(); | |
417 | } | |
418 | } | |
419 | ||
420 | if (map == null) { | |
421 | map = ResourceBundle.getBundle(type.getPackage().getName() + "." | |
2cce3dcb | 422 | + name.name(), locale, new FixedResourceBundleControl()); |
ec1f3444 NR |
423 | } |
424 | } | |
425 | ||
426 | /** | |
427 | * Return the resource file that is closer to the {@link Locale}. | |
428 | * | |
429 | * @param dir | |
430 | * the dirctory to look into | |
431 | * @param name | |
432 | * the file basename (without <tt>.properties</tt>) | |
433 | * @param locale | |
434 | * the {@link Locale} | |
435 | * | |
436 | * @return the closest match or NULL if none | |
437 | */ | |
438 | private File getPropertyFile(String dir, String name, Locale locale) { | |
439 | List<String> locales = new ArrayList<String>(); | |
440 | if (locale != null) { | |
441 | String country = locale.getCountry() == null ? "" : locale | |
442 | .getCountry(); | |
443 | String language = locale.getLanguage() == null ? "" : locale | |
444 | .getLanguage(); | |
445 | if (!language.isEmpty() && !country.isEmpty()) { | |
446 | locales.add("_" + language + "-" + country); | |
447 | } | |
448 | if (!language.isEmpty()) { | |
449 | locales.add("_" + language); | |
450 | } | |
451 | } | |
452 | ||
453 | locales.add(""); | |
454 | ||
455 | File file = null; | |
456 | for (String loc : locales) { | |
457 | file = new File(dir, name + loc + ".properties"); | |
458 | if (file.exists()) { | |
459 | break; | |
460 | } else { | |
461 | file = null; | |
462 | } | |
463 | } | |
464 | ||
465 | return file; | |
466 | } | |
467 | } |