| 1 | package be.nikiroo.fanfix; |
| 2 | |
| 3 | import java.io.File; |
| 4 | import java.io.IOException; |
| 5 | import java.util.Date; |
| 6 | |
| 7 | import be.nikiroo.fanfix.bundles.Config; |
| 8 | import be.nikiroo.fanfix.bundles.ConfigBundle; |
| 9 | import be.nikiroo.fanfix.bundles.StringId; |
| 10 | import be.nikiroo.fanfix.bundles.StringIdBundle; |
| 11 | import be.nikiroo.fanfix.bundles.StringIdGuiBundle; |
| 12 | import be.nikiroo.fanfix.bundles.UiConfig; |
| 13 | import be.nikiroo.fanfix.bundles.UiConfigBundle; |
| 14 | import be.nikiroo.fanfix.library.BasicLibrary; |
| 15 | import be.nikiroo.fanfix.library.CacheLibrary; |
| 16 | import be.nikiroo.fanfix.library.LocalLibrary; |
| 17 | import be.nikiroo.fanfix.library.RemoteLibrary; |
| 18 | import be.nikiroo.utils.Cache; |
| 19 | import be.nikiroo.utils.IOUtils; |
| 20 | import be.nikiroo.utils.Image; |
| 21 | import be.nikiroo.utils.Proxy; |
| 22 | import be.nikiroo.utils.TempFiles; |
| 23 | import be.nikiroo.utils.TraceHandler; |
| 24 | import be.nikiroo.utils.resources.Bundles; |
| 25 | |
| 26 | /** |
| 27 | * Global state for the program (services and singletons). |
| 28 | * |
| 29 | * @author niki |
| 30 | */ |
| 31 | public class Instance { |
| 32 | static private Instance instance; |
| 33 | static private Object instancelock = new Object(); |
| 34 | |
| 35 | private ConfigBundle config; |
| 36 | private UiConfigBundle uiconfig; |
| 37 | private StringIdBundle trans; |
| 38 | private DataLoader cache; |
| 39 | private StringIdGuiBundle transGui; |
| 40 | private BasicLibrary lib; |
| 41 | private File coverDir; |
| 42 | private File readerTmp; |
| 43 | private File remoteDir; |
| 44 | private String configDir; |
| 45 | private TraceHandler tracer; |
| 46 | private TempFiles tempFiles; |
| 47 | |
| 48 | /** |
| 49 | * Initialise the instance -- if already initialised, nothing will happen. |
| 50 | * <p> |
| 51 | * Before calling this method, you may call |
| 52 | * {@link Bundles#setDirectory(String)} if wanted. |
| 53 | * <p> |
| 54 | * Note that this method will honour some environment variables, the 3 most |
| 55 | * important ones probably being: |
| 56 | * <ul> |
| 57 | * <li><tt>DEBUG</tt>: will enable DEBUG output if set to 1 (or Y or TRUE or |
| 58 | * ON, case insensitive)</li> |
| 59 | * <li><tt>CONFIG_DIR</tt>: will use this directory as configuration |
| 60 | * directory (supports $HOME notation, defaults to $HOME/.fanfix</li> |
| 61 | * <li><tt>BOOKS_DIR</tt>: will use this directory as library directory |
| 62 | * (supports $HOME notation, defaults to $HOME/Books</li> |
| 63 | * </ul> |
| 64 | */ |
| 65 | static public void init() { |
| 66 | init(false); |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Initialise the instance -- if already initialised, nothing will happen unless |
| 71 | * you pass TRUE to <tt>force</tt>. |
| 72 | * <p> |
| 73 | * Before calling this method, you may call {@link Bundles#setDirectory(String)} |
| 74 | * if wanted. |
| 75 | * <p> |
| 76 | * Note: forcing the initialisation can be dangerous, so make sure to only make |
| 77 | * it under controlled circumstances -- for instance, at the start of the |
| 78 | * program, you could call {@link Instance#init()}, change some settings because |
| 79 | * you want to force those settings (it will also forbid users to change them!) |
| 80 | * and then call {@link Instance#init(boolean)} with <tt>force</tt> set to TRUE. |
| 81 | * |
| 82 | * @param force force the initialisation even if already initialised |
| 83 | */ |
| 84 | static public void init(boolean force) { |
| 85 | synchronized (instancelock) { |
| 86 | if (instance == null || force) { |
| 87 | instance = new Instance(); |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | } |
| 92 | |
| 93 | /** |
| 94 | * Force-initialise the {@link Instance} to a known value. |
| 95 | * <p> |
| 96 | * Usually for DEBUG/Test purposes. |
| 97 | * |
| 98 | * @param instance the actual Instance to use |
| 99 | */ |
| 100 | static public void init(Instance instance) { |
| 101 | Instance.instance = instance; |
| 102 | } |
| 103 | |
| 104 | /** |
| 105 | * The (mostly unique) instance of this {@link Instance}. |
| 106 | * |
| 107 | * @return the (mostly unique) instance |
| 108 | */ |
| 109 | public static Instance getInstance() { |
| 110 | return instance; |
| 111 | } |
| 112 | |
| 113 | /** |
| 114 | * Actually initialise the instance. |
| 115 | * <p> |
| 116 | * Before calling this method, you may call {@link Bundles#setDirectory(String)} |
| 117 | * if wanted. |
| 118 | */ |
| 119 | protected Instance() { |
| 120 | // Before we can configure it: |
| 121 | Boolean debug = checkEnv("DEBUG"); |
| 122 | boolean trace = debug != null && debug; |
| 123 | tracer = new TraceHandler(true, trace, trace); |
| 124 | |
| 125 | // config dir: |
| 126 | configDir = getConfigDir(); |
| 127 | if (!new File(configDir).exists()) { |
| 128 | new File(configDir).mkdirs(); |
| 129 | } |
| 130 | |
| 131 | // Most of the rest is dependent upon this: |
| 132 | createConfigs(configDir, false); |
| 133 | |
| 134 | // Proxy support |
| 135 | Proxy.use(config.getString(Config.NETWORK_PROXY)); |
| 136 | |
| 137 | // update tracer: |
| 138 | if (debug == null) { |
| 139 | debug = config.getBoolean(Config.DEBUG_ERR, false); |
| 140 | trace = config.getBoolean(Config.DEBUG_TRACE, false); |
| 141 | } |
| 142 | |
| 143 | tracer = new TraceHandler(true, debug, trace); |
| 144 | |
| 145 | // default Library |
| 146 | remoteDir = new File(configDir, "remote"); |
| 147 | lib = createDefaultLibrary(remoteDir); |
| 148 | |
| 149 | // create cache and TMP |
| 150 | File tmp = getFile(Config.CACHE_DIR, configDir, "tmp"); |
| 151 | Image.setTemporaryFilesRoot(new File(tmp.getParent(), "tmp.images")); |
| 152 | |
| 153 | String ua = config.getString(Config.NETWORK_USER_AGENT, ""); |
| 154 | try { |
| 155 | int hours = config.getInteger(Config.CACHE_MAX_TIME_CHANGING, 0); |
| 156 | int hoursLarge = config.getInteger(Config.CACHE_MAX_TIME_STABLE, 0); |
| 157 | cache = new DataLoader(tmp, ua, hours, hoursLarge); |
| 158 | } catch (IOException e) { |
| 159 | tracer.error(new IOException("Cannot create cache (will continue without cache)", e)); |
| 160 | cache = new DataLoader(ua); |
| 161 | } |
| 162 | |
| 163 | cache.setTraceHandler(tracer); |
| 164 | |
| 165 | // readerTmp / coverDir |
| 166 | readerTmp = getFile(UiConfig.CACHE_DIR_LOCAL_READER, configDir, "tmp-reader"); |
| 167 | coverDir = getFile(Config.DEFAULT_COVERS_DIR, configDir, "covers"); |
| 168 | coverDir.mkdirs(); |
| 169 | |
| 170 | try { |
| 171 | tempFiles = new TempFiles("fanfix"); |
| 172 | } catch (IOException e) { |
| 173 | tracer.error(new IOException("Cannot create temporary directory", e)); |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | /** |
| 178 | * The traces handler for this {@link Cache}. |
| 179 | * <p> |
| 180 | * It is never NULL. |
| 181 | * |
| 182 | * @return the traces handler (never NULL) |
| 183 | */ |
| 184 | public TraceHandler getTraceHandler() { |
| 185 | return tracer; |
| 186 | } |
| 187 | |
| 188 | /** |
| 189 | * The traces handler for this {@link Cache}. |
| 190 | * |
| 191 | * @param tracer the new traces handler or NULL |
| 192 | */ |
| 193 | public void setTraceHandler(TraceHandler tracer) { |
| 194 | if (tracer == null) { |
| 195 | tracer = new TraceHandler(false, false, false); |
| 196 | } |
| 197 | |
| 198 | this.tracer = tracer; |
| 199 | cache.setTraceHandler(tracer); |
| 200 | } |
| 201 | |
| 202 | /** |
| 203 | * Get the (unique) configuration service for the program. |
| 204 | * |
| 205 | * @return the configuration service |
| 206 | */ |
| 207 | public ConfigBundle getConfig() { |
| 208 | return config; |
| 209 | } |
| 210 | |
| 211 | /** |
| 212 | * Get the (unique) UI configuration service for the program. |
| 213 | * |
| 214 | * @return the configuration service |
| 215 | */ |
| 216 | public UiConfigBundle getUiConfig() { |
| 217 | return uiconfig; |
| 218 | } |
| 219 | |
| 220 | /** |
| 221 | * Reset the configuration. |
| 222 | * |
| 223 | * @param resetTrans also reset the translation files |
| 224 | */ |
| 225 | public void resetConfig(boolean resetTrans) { |
| 226 | String dir = Bundles.getDirectory(); |
| 227 | Bundles.setDirectory(null); |
| 228 | try { |
| 229 | try { |
| 230 | ConfigBundle config = new ConfigBundle(); |
| 231 | config.updateFile(configDir); |
| 232 | } catch (IOException e) { |
| 233 | tracer.error(e); |
| 234 | } |
| 235 | try { |
| 236 | UiConfigBundle uiconfig = new UiConfigBundle(); |
| 237 | uiconfig.updateFile(configDir); |
| 238 | } catch (IOException e) { |
| 239 | tracer.error(e); |
| 240 | } |
| 241 | |
| 242 | if (resetTrans) { |
| 243 | try { |
| 244 | StringIdBundle trans = new StringIdBundle(null); |
| 245 | trans.updateFile(configDir); |
| 246 | } catch (IOException e) { |
| 247 | tracer.error(e); |
| 248 | } |
| 249 | } |
| 250 | } finally { |
| 251 | Bundles.setDirectory(dir); |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | /** |
| 256 | * Get the (unique) {@link DataLoader} for the program. |
| 257 | * |
| 258 | * @return the {@link DataLoader} |
| 259 | */ |
| 260 | public DataLoader getCache() { |
| 261 | return cache; |
| 262 | } |
| 263 | |
| 264 | /** |
| 265 | * Get the (unique) {link StringIdBundle} for the program. |
| 266 | * <p> |
| 267 | * This is used for the translations of the core parts of Fanfix. |
| 268 | * |
| 269 | * @return the {link StringIdBundle} |
| 270 | */ |
| 271 | public StringIdBundle getTrans() { |
| 272 | return trans; |
| 273 | } |
| 274 | |
| 275 | /** |
| 276 | * Get the (unique) {link StringIdGuiBundle} for the program. |
| 277 | * <p> |
| 278 | * This is used for the translations of the GUI parts of Fanfix. |
| 279 | * |
| 280 | * @return the {link StringIdGuiBundle} |
| 281 | */ |
| 282 | public StringIdGuiBundle getTransGui() { |
| 283 | return transGui; |
| 284 | } |
| 285 | |
| 286 | /** |
| 287 | * Get the (unique) {@link BasicLibrary} for the program. |
| 288 | * |
| 289 | * @return the {@link BasicLibrary} |
| 290 | */ |
| 291 | public BasicLibrary getLibrary() { |
| 292 | if (lib == null) { |
| 293 | throw new NullPointerException("We don't have a library to return"); |
| 294 | } |
| 295 | |
| 296 | return lib; |
| 297 | } |
| 298 | |
| 299 | /** |
| 300 | * Change the default {@link BasicLibrary} for this program. |
| 301 | * <p> |
| 302 | * Be careful. |
| 303 | * |
| 304 | * @param lib |
| 305 | * the new {@link BasicLibrary} |
| 306 | */ |
| 307 | public void setLibrary(BasicLibrary lib) { |
| 308 | this.lib = lib; |
| 309 | } |
| 310 | |
| 311 | /** |
| 312 | * Return the directory where to look for default cover pages. |
| 313 | * |
| 314 | * @return the default covers directory |
| 315 | */ |
| 316 | public File getCoverDir() { |
| 317 | return coverDir; |
| 318 | } |
| 319 | |
| 320 | /** |
| 321 | * Return the directory where to store temporary files for the local reader. |
| 322 | * |
| 323 | * @return the directory |
| 324 | */ |
| 325 | public File getReaderDir() { |
| 326 | return readerTmp; |
| 327 | } |
| 328 | |
| 329 | /** |
| 330 | * Return the directory where to store temporary files for the remote |
| 331 | * {@link LocalLibrary}. |
| 332 | * |
| 333 | * @param host the remote for this host |
| 334 | * |
| 335 | * @return the directory |
| 336 | */ |
| 337 | public File getRemoteDir(String host) { |
| 338 | return getRemoteDir(remoteDir, host); |
| 339 | } |
| 340 | |
| 341 | /** |
| 342 | * Return the directory where to store temporary files for the remote |
| 343 | * {@link LocalLibrary}. |
| 344 | * |
| 345 | * @param remoteDir the base remote directory |
| 346 | * @param host the remote for this host |
| 347 | * |
| 348 | * @return the directory |
| 349 | */ |
| 350 | private File getRemoteDir(File remoteDir, String host) { |
| 351 | remoteDir.mkdirs(); |
| 352 | |
| 353 | if (host != null) { |
| 354 | return new File(remoteDir, host); |
| 355 | } |
| 356 | |
| 357 | return remoteDir; |
| 358 | } |
| 359 | |
| 360 | /** |
| 361 | * Check if we need to check that a new version of Fanfix is available. |
| 362 | * |
| 363 | * @return TRUE if we need to |
| 364 | */ |
| 365 | public boolean isVersionCheckNeeded() { |
| 366 | try { |
| 367 | long wait = config.getInteger(Config.NETWORK_UPDATE_INTERVAL, 0) * 24 * 60 * 60 * 1000; |
| 368 | if (wait >= 0) { |
| 369 | String lastUpString = IOUtils.readSmallFile(new File(configDir, "LAST_UPDATE")); |
| 370 | long delay = new Date().getTime() - Long.parseLong(lastUpString); |
| 371 | if (delay > wait) { |
| 372 | return true; |
| 373 | } |
| 374 | } else { |
| 375 | return false; |
| 376 | } |
| 377 | } catch (Exception e) { |
| 378 | // No file or bad file: |
| 379 | return true; |
| 380 | } |
| 381 | |
| 382 | return false; |
| 383 | } |
| 384 | |
| 385 | /** |
| 386 | * Notify that we checked for a new version of Fanfix. |
| 387 | */ |
| 388 | public void setVersionChecked() { |
| 389 | try { |
| 390 | IOUtils.writeSmallFile(new File(configDir), "LAST_UPDATE", Long.toString(new Date().getTime())); |
| 391 | } catch (IOException e) { |
| 392 | tracer.error(e); |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | /** |
| 397 | * The facility to use temporary files in this program. |
| 398 | * <p> |
| 399 | * <b>MUST</b> be closed at end of program. |
| 400 | * |
| 401 | * @return the facility |
| 402 | */ |
| 403 | public TempFiles getTempFiles() { |
| 404 | return tempFiles; |
| 405 | } |
| 406 | |
| 407 | /** |
| 408 | * The configuration directory (will check, in order of preference, the system |
| 409 | * properties, the environment and then defaults to |
| 410 | * {@link Instance#getHome()}/.fanfix). |
| 411 | * |
| 412 | * @return the config directory |
| 413 | */ |
| 414 | private String getConfigDir() { |
| 415 | String configDir = System.getProperty("CONFIG_DIR"); |
| 416 | |
| 417 | if (configDir == null) { |
| 418 | configDir = System.getenv("CONFIG_DIR"); |
| 419 | } |
| 420 | |
| 421 | if (configDir == null) { |
| 422 | configDir = new File(getHome(), ".fanfix").getPath(); |
| 423 | } |
| 424 | |
| 425 | return configDir; |
| 426 | } |
| 427 | |
| 428 | /** |
| 429 | * Create the config variables ({@link Instance#config}, |
| 430 | * {@link Instance#uiconfig}, {@link Instance#trans} and |
| 431 | * {@link Instance#transGui}). |
| 432 | * |
| 433 | * @param configDir the directory where to find the configuration files |
| 434 | * @param refresh TRUE to reset the configuration files from the default |
| 435 | * included ones |
| 436 | */ |
| 437 | private void createConfigs(String configDir, boolean refresh) { |
| 438 | if (!refresh) { |
| 439 | Bundles.setDirectory(configDir); |
| 440 | } |
| 441 | |
| 442 | try { |
| 443 | config = new ConfigBundle(); |
| 444 | config.updateFile(configDir); |
| 445 | } catch (IOException e) { |
| 446 | tracer.error(e); |
| 447 | } |
| 448 | |
| 449 | try { |
| 450 | uiconfig = new UiConfigBundle(); |
| 451 | uiconfig.updateFile(configDir); |
| 452 | } catch (IOException e) { |
| 453 | tracer.error(e); |
| 454 | } |
| 455 | |
| 456 | // No updateFile for this one! (we do not want the user to have custom |
| 457 | // translations that won't accept updates from newer versions) |
| 458 | trans = new StringIdBundle(getLang()); |
| 459 | transGui = new StringIdGuiBundle(getLang()); |
| 460 | |
| 461 | // Fix an old bug (we used to store custom translation files by |
| 462 | // default): |
| 463 | if (trans.getString(StringId.INPUT_DESC_CBZ) == null) { |
| 464 | trans.deleteFile(configDir); |
| 465 | } |
| 466 | |
| 467 | Boolean noutf = checkEnv("NOUTF"); |
| 468 | if (noutf != null && noutf) { |
| 469 | trans.setUnicode(false); |
| 470 | transGui.setUnicode(false); |
| 471 | } |
| 472 | |
| 473 | Bundles.setDirectory(configDir); |
| 474 | } |
| 475 | |
| 476 | /** |
| 477 | * Create the default library as specified by the config. |
| 478 | * |
| 479 | * @param remoteDir the base remote directory if needed |
| 480 | * |
| 481 | * @return the default {@link BasicLibrary} |
| 482 | */ |
| 483 | private BasicLibrary createDefaultLibrary(File remoteDir) { |
| 484 | BasicLibrary lib = null; |
| 485 | |
| 486 | boolean useRemote = config.getBoolean(Config.REMOTE_LIBRARY_ENABLED, false); |
| 487 | if (useRemote) { |
| 488 | String host = null; |
| 489 | int port = -1; |
| 490 | try { |
| 491 | host = config.getString(Config.REMOTE_LIBRARY_HOST); |
| 492 | port = config.getInteger(Config.REMOTE_LIBRARY_PORT, -1); |
| 493 | String key = config.getString(Config.REMOTE_LIBRARY_KEY); |
| 494 | |
| 495 | tracer.trace("Selecting remote library " + host + ":" + port); |
| 496 | lib = new RemoteLibrary(key, host, port); |
| 497 | lib = new CacheLibrary(getRemoteDir(remoteDir, host), lib, uiconfig); |
| 498 | } catch (Exception e) { |
| 499 | tracer.error(new IOException("Cannot create remote library for: " + host + ":" + port, e)); |
| 500 | } |
| 501 | } else { |
| 502 | String libDir = System.getenv("BOOKS_DIR"); |
| 503 | if (libDir == null || libDir.isEmpty()) { |
| 504 | libDir = getFile(Config.LIBRARY_DIR, configDir, "$HOME/Books").getPath(); |
| 505 | } |
| 506 | try { |
| 507 | lib = new LocalLibrary(new File(libDir), config); |
| 508 | } catch (Exception e) { |
| 509 | tracer.error(new IOException("Cannot create library for directory: " + libDir, e)); |
| 510 | } |
| 511 | } |
| 512 | |
| 513 | return lib; |
| 514 | } |
| 515 | |
| 516 | /** |
| 517 | * Return a path, but support the special $HOME variable. |
| 518 | * |
| 519 | * @param id the key for the path, which may contain "$HOME" |
| 520 | * @param configDir the directory to use as base if not absolute |
| 521 | * @param def the default value if none (will be configDir-rooted if needed) |
| 522 | * @return the path, with expanded "$HOME" if needed |
| 523 | */ |
| 524 | protected File getFile(Config id, String configDir, String def) { |
| 525 | String path = config.getString(id, def); |
| 526 | return getFile(path, configDir); |
| 527 | } |
| 528 | |
| 529 | /** |
| 530 | * Return a path, but support the special $HOME variable. |
| 531 | * |
| 532 | * @param id the key for the path, which may contain "$HOME" |
| 533 | * @param configDir the directory to use as base if not absolute |
| 534 | * @param def the default value if none (will be configDir-rooted if needed) |
| 535 | * @return the path, with expanded "$HOME" if needed |
| 536 | */ |
| 537 | protected File getFile(UiConfig id, String configDir, String def) { |
| 538 | String path = uiconfig.getString(id, def); |
| 539 | return getFile(path, configDir); |
| 540 | } |
| 541 | |
| 542 | /** |
| 543 | * Return a path, but support the special $HOME variable. |
| 544 | * |
| 545 | * @param path the path, which may contain "$HOME" |
| 546 | * @param configDir the directory to use as base if not absolute |
| 547 | * @return the path, with expanded "$HOME" if needed |
| 548 | */ |
| 549 | protected File getFile(String path, String configDir) { |
| 550 | File file = null; |
| 551 | if (path != null && !path.isEmpty()) { |
| 552 | path = path.replace('/', File.separatorChar); |
| 553 | if (path.contains("$HOME")) { |
| 554 | path = path.replace("$HOME", getHome()); |
| 555 | } else if (!path.startsWith("/")) { |
| 556 | path = new File(configDir, path).getPath(); |
| 557 | } |
| 558 | |
| 559 | file = new File(path); |
| 560 | } |
| 561 | |
| 562 | return file; |
| 563 | } |
| 564 | |
| 565 | /** |
| 566 | * Return the home directory from the environment (FANFIX_DIR) or the system |
| 567 | * properties. |
| 568 | * <p> |
| 569 | * The environment variable is tested first. Then, the custom property |
| 570 | * "fanfix.home" is tried, followed by the usual "user.home" then "java.io.tmp" |
| 571 | * if nothing else is found. |
| 572 | * |
| 573 | * @return the home |
| 574 | */ |
| 575 | protected String getHome() { |
| 576 | String home = System.getenv("FANFIX_DIR"); |
| 577 | if (home != null && new File(home).isFile()) { |
| 578 | home = null; |
| 579 | } |
| 580 | |
| 581 | if (home == null || home.trim().isEmpty()) { |
| 582 | home = System.getProperty("fanfix.home"); |
| 583 | if (home != null && new File(home).isFile()) { |
| 584 | home = null; |
| 585 | } |
| 586 | } |
| 587 | |
| 588 | if (home == null || home.trim().isEmpty()) { |
| 589 | home = System.getProperty("user.home"); |
| 590 | if (!new File(home).isDirectory()) { |
| 591 | home = null; |
| 592 | } |
| 593 | } |
| 594 | |
| 595 | if (home == null || home.trim().isEmpty()) { |
| 596 | home = System.getProperty("java.io.tmpdir"); |
| 597 | if (!new File(home).isDirectory()) { |
| 598 | home = null; |
| 599 | } |
| 600 | } |
| 601 | |
| 602 | if (home == null) { |
| 603 | home = ""; |
| 604 | } |
| 605 | |
| 606 | return home; |
| 607 | } |
| 608 | |
| 609 | /** |
| 610 | * The language to use for the application (NULL = default system language). |
| 611 | * |
| 612 | * @return the language |
| 613 | */ |
| 614 | protected String getLang() { |
| 615 | String lang = config.getString(Config.LANG); |
| 616 | |
| 617 | if (lang == null || lang.isEmpty()) { |
| 618 | if (System.getenv("LANG") != null && !System.getenv("LANG").isEmpty()) { |
| 619 | lang = System.getenv("LANG"); |
| 620 | } |
| 621 | } |
| 622 | |
| 623 | if (lang != null && lang.isEmpty()) { |
| 624 | lang = null; |
| 625 | } |
| 626 | |
| 627 | return lang; |
| 628 | } |
| 629 | |
| 630 | /** |
| 631 | * Check that the given environment variable is "enabled". |
| 632 | * |
| 633 | * @param key the variable to check |
| 634 | * |
| 635 | * @return TRUE if it is |
| 636 | */ |
| 637 | protected Boolean checkEnv(String key) { |
| 638 | String value = System.getenv(key); |
| 639 | if (value != null) { |
| 640 | value = value.trim().toLowerCase(); |
| 641 | if ("yes".equals(value) || "true".equals(value) || "on".equals(value) || "1".equals(value) |
| 642 | || "y".equals(value)) { |
| 643 | return true; |
| 644 | } |
| 645 | |
| 646 | return false; |
| 647 | } |
| 648 | |
| 649 | return null; |
| 650 | } |
| 651 | } |