| 1 | /** |
| 2 | ******************************************************************************* |
| 3 | * Copyright (C) 2001-2014, International Business Machines Corporation. |
| 4 | * All Rights Reserved. |
| 5 | ******************************************************************************* |
| 6 | */ |
| 7 | |
| 8 | #include "unicode/utypes.h" |
| 9 | |
| 10 | #if !UCONFIG_NO_SERVICE |
| 11 | |
| 12 | #include "serv.h" |
| 13 | #include "umutex.h" |
| 14 | |
| 15 | #undef SERVICE_REFCOUNT |
| 16 | |
| 17 | // in case we use the refcount stuff |
| 18 | |
| 19 | U_NAMESPACE_BEGIN |
| 20 | |
| 21 | /* |
| 22 | ****************************************************************** |
| 23 | */ |
| 24 | |
| 25 | const UChar ICUServiceKey::PREFIX_DELIMITER = 0x002F; /* '/' */ |
| 26 | |
| 27 | ICUServiceKey::ICUServiceKey(const UnicodeString& id) |
| 28 | : _id(id) { |
| 29 | } |
| 30 | |
| 31 | ICUServiceKey::~ICUServiceKey() |
| 32 | { |
| 33 | } |
| 34 | |
| 35 | const UnicodeString& |
| 36 | ICUServiceKey::getID() const |
| 37 | { |
| 38 | return _id; |
| 39 | } |
| 40 | |
| 41 | UnicodeString& |
| 42 | ICUServiceKey::canonicalID(UnicodeString& result) const |
| 43 | { |
| 44 | return result.append(_id); |
| 45 | } |
| 46 | |
| 47 | UnicodeString& |
| 48 | ICUServiceKey::currentID(UnicodeString& result) const |
| 49 | { |
| 50 | return canonicalID(result); |
| 51 | } |
| 52 | |
| 53 | UnicodeString& |
| 54 | ICUServiceKey::currentDescriptor(UnicodeString& result) const |
| 55 | { |
| 56 | prefix(result); |
| 57 | result.append(PREFIX_DELIMITER); |
| 58 | return currentID(result); |
| 59 | } |
| 60 | |
| 61 | UBool |
| 62 | ICUServiceKey::fallback() |
| 63 | { |
| 64 | return FALSE; |
| 65 | } |
| 66 | |
| 67 | UBool |
| 68 | ICUServiceKey::isFallbackOf(const UnicodeString& id) const |
| 69 | { |
| 70 | return id == _id; |
| 71 | } |
| 72 | |
| 73 | UnicodeString& |
| 74 | ICUServiceKey::prefix(UnicodeString& result) const |
| 75 | { |
| 76 | return result; |
| 77 | } |
| 78 | |
| 79 | UnicodeString& |
| 80 | ICUServiceKey::parsePrefix(UnicodeString& result) |
| 81 | { |
| 82 | int32_t n = result.indexOf(PREFIX_DELIMITER); |
| 83 | if (n < 0) { |
| 84 | n = 0; |
| 85 | } |
| 86 | result.remove(n); |
| 87 | return result; |
| 88 | } |
| 89 | |
| 90 | UnicodeString& |
| 91 | ICUServiceKey::parseSuffix(UnicodeString& result) |
| 92 | { |
| 93 | int32_t n = result.indexOf(PREFIX_DELIMITER); |
| 94 | if (n >= 0) { |
| 95 | result.remove(0, n+1); |
| 96 | } |
| 97 | return result; |
| 98 | } |
| 99 | |
| 100 | #ifdef SERVICE_DEBUG |
| 101 | UnicodeString& |
| 102 | ICUServiceKey::debug(UnicodeString& result) const |
| 103 | { |
| 104 | debugClass(result); |
| 105 | result.append((UnicodeString)" id: "); |
| 106 | result.append(_id); |
| 107 | return result; |
| 108 | } |
| 109 | |
| 110 | UnicodeString& |
| 111 | ICUServiceKey::debugClass(UnicodeString& result) const |
| 112 | { |
| 113 | return result.append((UnicodeString)"ICUServiceKey"); |
| 114 | } |
| 115 | #endif |
| 116 | |
| 117 | UOBJECT_DEFINE_RTTI_IMPLEMENTATION(ICUServiceKey) |
| 118 | |
| 119 | /* |
| 120 | ****************************************************************** |
| 121 | */ |
| 122 | |
| 123 | ICUServiceFactory::~ICUServiceFactory() {} |
| 124 | |
| 125 | SimpleFactory::SimpleFactory(UObject* instanceToAdopt, const UnicodeString& id, UBool visible) |
| 126 | : _instance(instanceToAdopt), _id(id), _visible(visible) |
| 127 | { |
| 128 | } |
| 129 | |
| 130 | SimpleFactory::~SimpleFactory() |
| 131 | { |
| 132 | delete _instance; |
| 133 | } |
| 134 | |
| 135 | UObject* |
| 136 | SimpleFactory::create(const ICUServiceKey& key, const ICUService* service, UErrorCode& status) const |
| 137 | { |
| 138 | if (U_SUCCESS(status)) { |
| 139 | UnicodeString temp; |
| 140 | if (_id == key.currentID(temp)) { |
| 141 | return service->cloneInstance(_instance); |
| 142 | } |
| 143 | } |
| 144 | return NULL; |
| 145 | } |
| 146 | |
| 147 | void |
| 148 | SimpleFactory::updateVisibleIDs(Hashtable& result, UErrorCode& status) const |
| 149 | { |
| 150 | if (_visible) { |
| 151 | result.put(_id, (void*)this, status); // cast away const |
| 152 | } else { |
| 153 | result.remove(_id); |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | UnicodeString& |
| 158 | SimpleFactory::getDisplayName(const UnicodeString& id, const Locale& /* locale */, UnicodeString& result) const |
| 159 | { |
| 160 | if (_visible && _id == id) { |
| 161 | result = _id; |
| 162 | } else { |
| 163 | result.setToBogus(); |
| 164 | } |
| 165 | return result; |
| 166 | } |
| 167 | |
| 168 | #ifdef SERVICE_DEBUG |
| 169 | UnicodeString& |
| 170 | SimpleFactory::debug(UnicodeString& toAppendTo) const |
| 171 | { |
| 172 | debugClass(toAppendTo); |
| 173 | toAppendTo.append((UnicodeString)" id: "); |
| 174 | toAppendTo.append(_id); |
| 175 | toAppendTo.append((UnicodeString)", visible: "); |
| 176 | toAppendTo.append(_visible ? (UnicodeString)"T" : (UnicodeString)"F"); |
| 177 | return toAppendTo; |
| 178 | } |
| 179 | |
| 180 | UnicodeString& |
| 181 | SimpleFactory::debugClass(UnicodeString& toAppendTo) const |
| 182 | { |
| 183 | return toAppendTo.append((UnicodeString)"SimpleFactory"); |
| 184 | } |
| 185 | #endif |
| 186 | |
| 187 | UOBJECT_DEFINE_RTTI_IMPLEMENTATION(SimpleFactory) |
| 188 | |
| 189 | /* |
| 190 | ****************************************************************** |
| 191 | */ |
| 192 | |
| 193 | ServiceListener::~ServiceListener() {} |
| 194 | |
| 195 | UOBJECT_DEFINE_RTTI_IMPLEMENTATION(ServiceListener) |
| 196 | |
| 197 | /* |
| 198 | ****************************************************************** |
| 199 | */ |
| 200 | |
| 201 | // Record the actual id for this service in the cache, so we can return it |
| 202 | // even if we succeed later with a different id. |
| 203 | class CacheEntry : public UMemory { |
| 204 | private: |
| 205 | int32_t refcount; |
| 206 | |
| 207 | public: |
| 208 | UnicodeString actualDescriptor; |
| 209 | UObject* service; |
| 210 | |
| 211 | /** |
| 212 | * Releases a reference to the shared resource. |
| 213 | */ |
| 214 | ~CacheEntry() { |
| 215 | delete service; |
| 216 | } |
| 217 | |
| 218 | CacheEntry(const UnicodeString& _actualDescriptor, UObject* _service) |
| 219 | : refcount(1), actualDescriptor(_actualDescriptor), service(_service) { |
| 220 | } |
| 221 | |
| 222 | /** |
| 223 | * Instantiation creates an initial reference, so don't call this |
| 224 | * unless you're creating a new pointer to this. Management of |
| 225 | * that pointer will have to know how to deal with refcounts. |
| 226 | * Return true if the resource has not already been released. |
| 227 | */ |
| 228 | CacheEntry* ref() { |
| 229 | ++refcount; |
| 230 | return this; |
| 231 | } |
| 232 | |
| 233 | /** |
| 234 | * Destructions removes a reference, so don't call this unless |
| 235 | * you're removing pointer to this somewhere. Management of that |
| 236 | * pointer will have to know how to deal with refcounts. Once |
| 237 | * the refcount drops to zero, the resource is released. Return |
| 238 | * false if the resouce has been released. |
| 239 | */ |
| 240 | CacheEntry* unref() { |
| 241 | if ((--refcount) == 0) { |
| 242 | delete this; |
| 243 | return NULL; |
| 244 | } |
| 245 | return this; |
| 246 | } |
| 247 | |
| 248 | /** |
| 249 | * Return TRUE if there is at least one reference to this and the |
| 250 | * resource has not been released. |
| 251 | */ |
| 252 | UBool isShared() const { |
| 253 | return refcount > 1; |
| 254 | } |
| 255 | }; |
| 256 | |
| 257 | // UObjectDeleter for serviceCache |
| 258 | U_CDECL_BEGIN |
| 259 | static void U_CALLCONV |
| 260 | cacheDeleter(void* obj) { |
| 261 | U_NAMESPACE_USE ((CacheEntry*)obj)->unref(); |
| 262 | } |
| 263 | |
| 264 | /** |
| 265 | * Deleter for UObjects |
| 266 | */ |
| 267 | static void U_CALLCONV |
| 268 | deleteUObject(void *obj) { |
| 269 | U_NAMESPACE_USE delete (UObject*) obj; |
| 270 | } |
| 271 | U_CDECL_END |
| 272 | |
| 273 | /* |
| 274 | ****************************************************************** |
| 275 | */ |
| 276 | |
| 277 | class DNCache : public UMemory { |
| 278 | public: |
| 279 | Hashtable cache; |
| 280 | const Locale locale; |
| 281 | |
| 282 | DNCache(const Locale& _locale) |
| 283 | : cache(), locale(_locale) |
| 284 | { |
| 285 | // cache.setKeyDeleter(uprv_deleteUObject); |
| 286 | } |
| 287 | }; |
| 288 | |
| 289 | |
| 290 | /* |
| 291 | ****************************************************************** |
| 292 | */ |
| 293 | |
| 294 | StringPair* |
| 295 | StringPair::create(const UnicodeString& displayName, |
| 296 | const UnicodeString& id, |
| 297 | UErrorCode& status) |
| 298 | { |
| 299 | if (U_SUCCESS(status)) { |
| 300 | StringPair* sp = new StringPair(displayName, id); |
| 301 | if (sp == NULL || sp->isBogus()) { |
| 302 | status = U_MEMORY_ALLOCATION_ERROR; |
| 303 | delete sp; |
| 304 | return NULL; |
| 305 | } |
| 306 | return sp; |
| 307 | } |
| 308 | return NULL; |
| 309 | } |
| 310 | |
| 311 | UBool |
| 312 | StringPair::isBogus() const { |
| 313 | return displayName.isBogus() || id.isBogus(); |
| 314 | } |
| 315 | |
| 316 | StringPair::StringPair(const UnicodeString& _displayName, |
| 317 | const UnicodeString& _id) |
| 318 | : displayName(_displayName) |
| 319 | , id(_id) |
| 320 | { |
| 321 | } |
| 322 | |
| 323 | U_CDECL_BEGIN |
| 324 | static void U_CALLCONV |
| 325 | userv_deleteStringPair(void *obj) { |
| 326 | U_NAMESPACE_USE delete (StringPair*) obj; |
| 327 | } |
| 328 | U_CDECL_END |
| 329 | |
| 330 | /* |
| 331 | ****************************************************************** |
| 332 | */ |
| 333 | |
| 334 | static UMutex lock = U_MUTEX_INITIALIZER; |
| 335 | |
| 336 | ICUService::ICUService() |
| 337 | : name() |
| 338 | , timestamp(0) |
| 339 | , factories(NULL) |
| 340 | , serviceCache(NULL) |
| 341 | , idCache(NULL) |
| 342 | , dnCache(NULL) |
| 343 | { |
| 344 | } |
| 345 | |
| 346 | ICUService::ICUService(const UnicodeString& newName) |
| 347 | : name(newName) |
| 348 | , timestamp(0) |
| 349 | , factories(NULL) |
| 350 | , serviceCache(NULL) |
| 351 | , idCache(NULL) |
| 352 | , dnCache(NULL) |
| 353 | { |
| 354 | } |
| 355 | |
| 356 | ICUService::~ICUService() |
| 357 | { |
| 358 | { |
| 359 | Mutex mutex(&lock); |
| 360 | clearCaches(); |
| 361 | delete factories; |
| 362 | factories = NULL; |
| 363 | } |
| 364 | } |
| 365 | |
| 366 | UObject* |
| 367 | ICUService::get(const UnicodeString& descriptor, UErrorCode& status) const |
| 368 | { |
| 369 | return get(descriptor, NULL, status); |
| 370 | } |
| 371 | |
| 372 | UObject* |
| 373 | ICUService::get(const UnicodeString& descriptor, UnicodeString* actualReturn, UErrorCode& status) const |
| 374 | { |
| 375 | UObject* result = NULL; |
| 376 | ICUServiceKey* key = createKey(&descriptor, status); |
| 377 | if (key) { |
| 378 | result = getKey(*key, actualReturn, status); |
| 379 | delete key; |
| 380 | } |
| 381 | return result; |
| 382 | } |
| 383 | |
| 384 | UObject* |
| 385 | ICUService::getKey(ICUServiceKey& key, UErrorCode& status) const |
| 386 | { |
| 387 | return getKey(key, NULL, status); |
| 388 | } |
| 389 | |
| 390 | // this is a vector that subclasses of ICUService can override to further customize the result object |
| 391 | // before returning it. All other public get functions should call this one. |
| 392 | |
| 393 | UObject* |
| 394 | ICUService::getKey(ICUServiceKey& key, UnicodeString* actualReturn, UErrorCode& status) const |
| 395 | { |
| 396 | return getKey(key, actualReturn, NULL, status); |
| 397 | } |
| 398 | |
| 399 | // make it possible to call reentrantly on systems that don't have reentrant mutexes. |
| 400 | // we can use this simple approach since we know the situation where we're calling |
| 401 | // reentrantly even without knowing the thread. |
| 402 | class XMutex : public UMemory { |
| 403 | public: |
| 404 | inline XMutex(UMutex *mutex, UBool reentering) |
| 405 | : fMutex(mutex) |
| 406 | , fActive(!reentering) |
| 407 | { |
| 408 | if (fActive) umtx_lock(fMutex); |
| 409 | } |
| 410 | inline ~XMutex() { |
| 411 | if (fActive) umtx_unlock(fMutex); |
| 412 | } |
| 413 | |
| 414 | private: |
| 415 | UMutex *fMutex; |
| 416 | UBool fActive; |
| 417 | }; |
| 418 | |
| 419 | struct UVectorDeleter { |
| 420 | UVector* _obj; |
| 421 | UVectorDeleter() : _obj(NULL) {} |
| 422 | ~UVectorDeleter() { delete _obj; } |
| 423 | }; |
| 424 | |
| 425 | // called only by factories, treat as private |
| 426 | UObject* |
| 427 | ICUService::getKey(ICUServiceKey& key, UnicodeString* actualReturn, const ICUServiceFactory* factory, UErrorCode& status) const |
| 428 | { |
| 429 | if (U_FAILURE(status)) { |
| 430 | return NULL; |
| 431 | } |
| 432 | |
| 433 | if (isDefault()) { |
| 434 | return handleDefault(key, actualReturn, status); |
| 435 | } |
| 436 | |
| 437 | ICUService* ncthis = (ICUService*)this; // cast away semantic const |
| 438 | |
| 439 | CacheEntry* result = NULL; |
| 440 | { |
| 441 | // The factory list can't be modified until we're done, |
| 442 | // otherwise we might update the cache with an invalid result. |
| 443 | // The cache has to stay in synch with the factory list. |
| 444 | // ICU doesn't have monitors so we can't use rw locks, so |
| 445 | // we single-thread everything using this service, for now. |
| 446 | |
| 447 | // if factory is not null, we're calling from within the mutex, |
| 448 | // and since some unix machines don't have reentrant mutexes we |
| 449 | // need to make sure not to try to lock it again. |
| 450 | XMutex mutex(&lock, factory != NULL); |
| 451 | |
| 452 | if (serviceCache == NULL) { |
| 453 | ncthis->serviceCache = new Hashtable(status); |
| 454 | if (ncthis->serviceCache == NULL) { |
| 455 | return NULL; |
| 456 | } |
| 457 | if (U_FAILURE(status)) { |
| 458 | delete serviceCache; |
| 459 | return NULL; |
| 460 | } |
| 461 | serviceCache->setValueDeleter(cacheDeleter); |
| 462 | } |
| 463 | |
| 464 | UnicodeString currentDescriptor; |
| 465 | UVectorDeleter cacheDescriptorList; |
| 466 | UBool putInCache = FALSE; |
| 467 | |
| 468 | int32_t startIndex = 0; |
| 469 | int32_t limit = factories->size(); |
| 470 | UBool cacheResult = TRUE; |
| 471 | |
| 472 | if (factory != NULL) { |
| 473 | for (int32_t i = 0; i < limit; ++i) { |
| 474 | if (factory == (const ICUServiceFactory*)factories->elementAt(i)) { |
| 475 | startIndex = i + 1; |
| 476 | break; |
| 477 | } |
| 478 | } |
| 479 | if (startIndex == 0) { |
| 480 | // throw new InternalError("Factory " + factory + "not registered with service: " + this); |
| 481 | status = U_ILLEGAL_ARGUMENT_ERROR; |
| 482 | return NULL; |
| 483 | } |
| 484 | cacheResult = FALSE; |
| 485 | } |
| 486 | |
| 487 | do { |
| 488 | currentDescriptor.remove(); |
| 489 | key.currentDescriptor(currentDescriptor); |
| 490 | result = (CacheEntry*)serviceCache->get(currentDescriptor); |
| 491 | if (result != NULL) { |
| 492 | break; |
| 493 | } |
| 494 | |
| 495 | // first test of cache failed, so we'll have to update |
| 496 | // the cache if we eventually succeed-- that is, if we're |
| 497 | // going to update the cache at all. |
| 498 | putInCache = TRUE; |
| 499 | |
| 500 | int32_t index = startIndex; |
| 501 | while (index < limit) { |
| 502 | ICUServiceFactory* f = (ICUServiceFactory*)factories->elementAt(index++); |
| 503 | UObject* service = f->create(key, this, status); |
| 504 | if (U_FAILURE(status)) { |
| 505 | delete service; |
| 506 | return NULL; |
| 507 | } |
| 508 | if (service != NULL) { |
| 509 | result = new CacheEntry(currentDescriptor, service); |
| 510 | if (result == NULL) { |
| 511 | delete service; |
| 512 | status = U_MEMORY_ALLOCATION_ERROR; |
| 513 | return NULL; |
| 514 | } |
| 515 | |
| 516 | goto outerEnd; |
| 517 | } |
| 518 | } |
| 519 | |
| 520 | // prepare to load the cache with all additional ids that |
| 521 | // will resolve to result, assuming we'll succeed. We |
| 522 | // don't want to keep querying on an id that's going to |
| 523 | // fallback to the one that succeeded, we want to hit the |
| 524 | // cache the first time next goaround. |
| 525 | if (cacheDescriptorList._obj == NULL) { |
| 526 | cacheDescriptorList._obj = new UVector(uprv_deleteUObject, NULL, 5, status); |
| 527 | if (U_FAILURE(status)) { |
| 528 | return NULL; |
| 529 | } |
| 530 | } |
| 531 | UnicodeString* idToCache = new UnicodeString(currentDescriptor); |
| 532 | if (idToCache == NULL || idToCache->isBogus()) { |
| 533 | status = U_MEMORY_ALLOCATION_ERROR; |
| 534 | return NULL; |
| 535 | } |
| 536 | |
| 537 | cacheDescriptorList._obj->addElement(idToCache, status); |
| 538 | if (U_FAILURE(status)) { |
| 539 | return NULL; |
| 540 | } |
| 541 | } while (key.fallback()); |
| 542 | outerEnd: |
| 543 | |
| 544 | if (result != NULL) { |
| 545 | if (putInCache && cacheResult) { |
| 546 | serviceCache->put(result->actualDescriptor, result, status); |
| 547 | if (U_FAILURE(status)) { |
| 548 | delete result; |
| 549 | return NULL; |
| 550 | } |
| 551 | |
| 552 | if (cacheDescriptorList._obj != NULL) { |
| 553 | for (int32_t i = cacheDescriptorList._obj->size(); --i >= 0;) { |
| 554 | UnicodeString* desc = (UnicodeString*)cacheDescriptorList._obj->elementAt(i); |
| 555 | serviceCache->put(*desc, result, status); |
| 556 | if (U_FAILURE(status)) { |
| 557 | delete result; |
| 558 | return NULL; |
| 559 | } |
| 560 | |
| 561 | result->ref(); |
| 562 | cacheDescriptorList._obj->removeElementAt(i); |
| 563 | } |
| 564 | } |
| 565 | } |
| 566 | |
| 567 | if (actualReturn != NULL) { |
| 568 | // strip null prefix |
| 569 | if (result->actualDescriptor.indexOf((UChar)0x2f) == 0) { // U+002f=slash (/) |
| 570 | actualReturn->remove(); |
| 571 | actualReturn->append(result->actualDescriptor, |
| 572 | 1, |
| 573 | result->actualDescriptor.length() - 1); |
| 574 | } else { |
| 575 | *actualReturn = result->actualDescriptor; |
| 576 | } |
| 577 | |
| 578 | if (actualReturn->isBogus()) { |
| 579 | status = U_MEMORY_ALLOCATION_ERROR; |
| 580 | delete result; |
| 581 | return NULL; |
| 582 | } |
| 583 | } |
| 584 | |
| 585 | UObject* service = cloneInstance(result->service); |
| 586 | if (putInCache && !cacheResult) { |
| 587 | delete result; |
| 588 | } |
| 589 | return service; |
| 590 | } |
| 591 | } |
| 592 | |
| 593 | return handleDefault(key, actualReturn, status); |
| 594 | } |
| 595 | |
| 596 | UObject* |
| 597 | ICUService::handleDefault(const ICUServiceKey& /* key */, UnicodeString* /* actualIDReturn */, UErrorCode& /* status */) const |
| 598 | { |
| 599 | return NULL; |
| 600 | } |
| 601 | |
| 602 | UVector& |
| 603 | ICUService::getVisibleIDs(UVector& result, UErrorCode& status) const { |
| 604 | return getVisibleIDs(result, NULL, status); |
| 605 | } |
| 606 | |
| 607 | UVector& |
| 608 | ICUService::getVisibleIDs(UVector& result, const UnicodeString* matchID, UErrorCode& status) const |
| 609 | { |
| 610 | result.removeAllElements(); |
| 611 | |
| 612 | if (U_FAILURE(status)) { |
| 613 | return result; |
| 614 | } |
| 615 | |
| 616 | { |
| 617 | Mutex mutex(&lock); |
| 618 | const Hashtable* map = getVisibleIDMap(status); |
| 619 | if (map != NULL) { |
| 620 | ICUServiceKey* fallbackKey = createKey(matchID, status); |
| 621 | |
| 622 | for (int32_t pos = UHASH_FIRST;;) { |
| 623 | const UHashElement* e = map->nextElement(pos); |
| 624 | if (e == NULL) { |
| 625 | break; |
| 626 | } |
| 627 | |
| 628 | const UnicodeString* id = (const UnicodeString*)e->key.pointer; |
| 629 | if (fallbackKey != NULL) { |
| 630 | if (!fallbackKey->isFallbackOf(*id)) { |
| 631 | continue; |
| 632 | } |
| 633 | } |
| 634 | |
| 635 | UnicodeString* idClone = new UnicodeString(*id); |
| 636 | if (idClone == NULL || idClone->isBogus()) { |
| 637 | delete idClone; |
| 638 | status = U_MEMORY_ALLOCATION_ERROR; |
| 639 | break; |
| 640 | } |
| 641 | result.addElement(idClone, status); |
| 642 | if (U_FAILURE(status)) { |
| 643 | delete idClone; |
| 644 | break; |
| 645 | } |
| 646 | } |
| 647 | delete fallbackKey; |
| 648 | } |
| 649 | } |
| 650 | if (U_FAILURE(status)) { |
| 651 | result.removeAllElements(); |
| 652 | } |
| 653 | return result; |
| 654 | } |
| 655 | |
| 656 | const Hashtable* |
| 657 | ICUService::getVisibleIDMap(UErrorCode& status) const { |
| 658 | if (U_FAILURE(status)) return NULL; |
| 659 | |
| 660 | // must only be called when lock is already held |
| 661 | |
| 662 | ICUService* ncthis = (ICUService*)this; // cast away semantic const |
| 663 | if (idCache == NULL) { |
| 664 | ncthis->idCache = new Hashtable(status); |
| 665 | if (idCache == NULL) { |
| 666 | status = U_MEMORY_ALLOCATION_ERROR; |
| 667 | } else if (factories != NULL) { |
| 668 | for (int32_t pos = factories->size(); --pos >= 0;) { |
| 669 | ICUServiceFactory* f = (ICUServiceFactory*)factories->elementAt(pos); |
| 670 | f->updateVisibleIDs(*idCache, status); |
| 671 | } |
| 672 | if (U_FAILURE(status)) { |
| 673 | delete idCache; |
| 674 | ncthis->idCache = NULL; |
| 675 | } |
| 676 | } |
| 677 | } |
| 678 | |
| 679 | return idCache; |
| 680 | } |
| 681 | |
| 682 | |
| 683 | UnicodeString& |
| 684 | ICUService::getDisplayName(const UnicodeString& id, UnicodeString& result) const |
| 685 | { |
| 686 | return getDisplayName(id, result, Locale::getDefault()); |
| 687 | } |
| 688 | |
| 689 | UnicodeString& |
| 690 | ICUService::getDisplayName(const UnicodeString& id, UnicodeString& result, const Locale& locale) const |
| 691 | { |
| 692 | { |
| 693 | UErrorCode status = U_ZERO_ERROR; |
| 694 | Mutex mutex(&lock); |
| 695 | const Hashtable* map = getVisibleIDMap(status); |
| 696 | if (map != NULL) { |
| 697 | ICUServiceFactory* f = (ICUServiceFactory*)map->get(id); |
| 698 | if (f != NULL) { |
| 699 | f->getDisplayName(id, locale, result); |
| 700 | return result; |
| 701 | } |
| 702 | |
| 703 | // fallback |
| 704 | UErrorCode status = U_ZERO_ERROR; |
| 705 | ICUServiceKey* fallbackKey = createKey(&id, status); |
| 706 | while (fallbackKey->fallback()) { |
| 707 | UnicodeString us; |
| 708 | fallbackKey->currentID(us); |
| 709 | f = (ICUServiceFactory*)map->get(us); |
| 710 | if (f != NULL) { |
| 711 | f->getDisplayName(id, locale, result); |
| 712 | delete fallbackKey; |
| 713 | return result; |
| 714 | } |
| 715 | } |
| 716 | delete fallbackKey; |
| 717 | } |
| 718 | } |
| 719 | result.setToBogus(); |
| 720 | return result; |
| 721 | } |
| 722 | |
| 723 | UVector& |
| 724 | ICUService::getDisplayNames(UVector& result, UErrorCode& status) const |
| 725 | { |
| 726 | return getDisplayNames(result, Locale::getDefault(), NULL, status); |
| 727 | } |
| 728 | |
| 729 | |
| 730 | UVector& |
| 731 | ICUService::getDisplayNames(UVector& result, const Locale& locale, UErrorCode& status) const |
| 732 | { |
| 733 | return getDisplayNames(result, locale, NULL, status); |
| 734 | } |
| 735 | |
| 736 | UVector& |
| 737 | ICUService::getDisplayNames(UVector& result, |
| 738 | const Locale& locale, |
| 739 | const UnicodeString* matchID, |
| 740 | UErrorCode& status) const |
| 741 | { |
| 742 | result.removeAllElements(); |
| 743 | result.setDeleter(userv_deleteStringPair); |
| 744 | if (U_SUCCESS(status)) { |
| 745 | ICUService* ncthis = (ICUService*)this; // cast away semantic const |
| 746 | Mutex mutex(&lock); |
| 747 | |
| 748 | if (dnCache != NULL && dnCache->locale != locale) { |
| 749 | delete dnCache; |
| 750 | ncthis->dnCache = NULL; |
| 751 | } |
| 752 | |
| 753 | if (dnCache == NULL) { |
| 754 | const Hashtable* m = getVisibleIDMap(status); |
| 755 | if (U_FAILURE(status)) { |
| 756 | return result; |
| 757 | } |
| 758 | ncthis->dnCache = new DNCache(locale); |
| 759 | if (dnCache == NULL) { |
| 760 | status = U_MEMORY_ALLOCATION_ERROR; |
| 761 | return result; |
| 762 | } |
| 763 | |
| 764 | int32_t pos = UHASH_FIRST; |
| 765 | const UHashElement* entry = NULL; |
| 766 | while ((entry = m->nextElement(pos)) != NULL) { |
| 767 | const UnicodeString* id = (const UnicodeString*)entry->key.pointer; |
| 768 | ICUServiceFactory* f = (ICUServiceFactory*)entry->value.pointer; |
| 769 | UnicodeString dname; |
| 770 | f->getDisplayName(*id, locale, dname); |
| 771 | if (dname.isBogus()) { |
| 772 | status = U_MEMORY_ALLOCATION_ERROR; |
| 773 | } else { |
| 774 | dnCache->cache.put(dname, (void*)id, status); // share pointer with visibleIDMap |
| 775 | if (U_SUCCESS(status)) { |
| 776 | continue; |
| 777 | } |
| 778 | } |
| 779 | delete dnCache; |
| 780 | ncthis->dnCache = NULL; |
| 781 | return result; |
| 782 | } |
| 783 | } |
| 784 | } |
| 785 | |
| 786 | ICUServiceKey* matchKey = createKey(matchID, status); |
| 787 | /* To ensure that all elements in the hashtable are iterated, set pos to -1. |
| 788 | * nextElement(pos) will skip the position at pos and begin the iteration |
| 789 | * at the next position, which in this case will be 0. |
| 790 | */ |
| 791 | int32_t pos = UHASH_FIRST; |
| 792 | const UHashElement *entry = NULL; |
| 793 | while ((entry = dnCache->cache.nextElement(pos)) != NULL) { |
| 794 | const UnicodeString* id = (const UnicodeString*)entry->value.pointer; |
| 795 | if (matchKey != NULL && !matchKey->isFallbackOf(*id)) { |
| 796 | continue; |
| 797 | } |
| 798 | const UnicodeString* dn = (const UnicodeString*)entry->key.pointer; |
| 799 | StringPair* sp = StringPair::create(*id, *dn, status); |
| 800 | result.addElement(sp, status); |
| 801 | if (U_FAILURE(status)) { |
| 802 | result.removeAllElements(); |
| 803 | break; |
| 804 | } |
| 805 | } |
| 806 | delete matchKey; |
| 807 | |
| 808 | return result; |
| 809 | } |
| 810 | |
| 811 | URegistryKey |
| 812 | ICUService::registerInstance(UObject* objToAdopt, const UnicodeString& id, UErrorCode& status) |
| 813 | { |
| 814 | return registerInstance(objToAdopt, id, TRUE, status); |
| 815 | } |
| 816 | |
| 817 | URegistryKey |
| 818 | ICUService::registerInstance(UObject* objToAdopt, const UnicodeString& id, UBool visible, UErrorCode& status) |
| 819 | { |
| 820 | ICUServiceKey* key = createKey(&id, status); |
| 821 | if (key != NULL) { |
| 822 | UnicodeString canonicalID; |
| 823 | key->canonicalID(canonicalID); |
| 824 | delete key; |
| 825 | |
| 826 | ICUServiceFactory* f = createSimpleFactory(objToAdopt, canonicalID, visible, status); |
| 827 | if (f != NULL) { |
| 828 | return registerFactory(f, status); |
| 829 | } |
| 830 | } |
| 831 | delete objToAdopt; |
| 832 | return NULL; |
| 833 | } |
| 834 | |
| 835 | ICUServiceFactory* |
| 836 | ICUService::createSimpleFactory(UObject* objToAdopt, const UnicodeString& id, UBool visible, UErrorCode& status) |
| 837 | { |
| 838 | if (U_SUCCESS(status)) { |
| 839 | if ((objToAdopt != NULL) && (!id.isBogus())) { |
| 840 | return new SimpleFactory(objToAdopt, id, visible); |
| 841 | } |
| 842 | status = U_ILLEGAL_ARGUMENT_ERROR; |
| 843 | } |
| 844 | return NULL; |
| 845 | } |
| 846 | |
| 847 | URegistryKey |
| 848 | ICUService::registerFactory(ICUServiceFactory* factoryToAdopt, UErrorCode& status) |
| 849 | { |
| 850 | if (U_SUCCESS(status) && factoryToAdopt != NULL) { |
| 851 | Mutex mutex(&lock); |
| 852 | |
| 853 | if (factories == NULL) { |
| 854 | factories = new UVector(deleteUObject, NULL, status); |
| 855 | if (U_FAILURE(status)) { |
| 856 | delete factories; |
| 857 | return NULL; |
| 858 | } |
| 859 | } |
| 860 | factories->insertElementAt(factoryToAdopt, 0, status); |
| 861 | if (U_SUCCESS(status)) { |
| 862 | clearCaches(); |
| 863 | } else { |
| 864 | delete factoryToAdopt; |
| 865 | factoryToAdopt = NULL; |
| 866 | } |
| 867 | } |
| 868 | |
| 869 | if (factoryToAdopt != NULL) { |
| 870 | notifyChanged(); |
| 871 | } |
| 872 | |
| 873 | return (URegistryKey)factoryToAdopt; |
| 874 | } |
| 875 | |
| 876 | UBool |
| 877 | ICUService::unregister(URegistryKey rkey, UErrorCode& status) |
| 878 | { |
| 879 | ICUServiceFactory *factory = (ICUServiceFactory*)rkey; |
| 880 | UBool result = FALSE; |
| 881 | if (factory != NULL && factories != NULL) { |
| 882 | Mutex mutex(&lock); |
| 883 | |
| 884 | if (factories->removeElement(factory)) { |
| 885 | clearCaches(); |
| 886 | result = TRUE; |
| 887 | } else { |
| 888 | status = U_ILLEGAL_ARGUMENT_ERROR; |
| 889 | delete factory; |
| 890 | } |
| 891 | } |
| 892 | if (result) { |
| 893 | notifyChanged(); |
| 894 | } |
| 895 | return result; |
| 896 | } |
| 897 | |
| 898 | void |
| 899 | ICUService::reset() |
| 900 | { |
| 901 | { |
| 902 | Mutex mutex(&lock); |
| 903 | reInitializeFactories(); |
| 904 | clearCaches(); |
| 905 | } |
| 906 | notifyChanged(); |
| 907 | } |
| 908 | |
| 909 | void |
| 910 | ICUService::reInitializeFactories() |
| 911 | { |
| 912 | if (factories != NULL) { |
| 913 | factories->removeAllElements(); |
| 914 | } |
| 915 | } |
| 916 | |
| 917 | UBool |
| 918 | ICUService::isDefault() const |
| 919 | { |
| 920 | return countFactories() == 0; |
| 921 | } |
| 922 | |
| 923 | ICUServiceKey* |
| 924 | ICUService::createKey(const UnicodeString* id, UErrorCode& status) const |
| 925 | { |
| 926 | return (U_FAILURE(status) || id == NULL) ? NULL : new ICUServiceKey(*id); |
| 927 | } |
| 928 | |
| 929 | void |
| 930 | ICUService::clearCaches() |
| 931 | { |
| 932 | // callers synchronize before use |
| 933 | ++timestamp; |
| 934 | delete dnCache; |
| 935 | dnCache = NULL; |
| 936 | delete idCache; |
| 937 | idCache = NULL; |
| 938 | delete serviceCache; serviceCache = NULL; |
| 939 | } |
| 940 | |
| 941 | void |
| 942 | ICUService::clearServiceCache() |
| 943 | { |
| 944 | // callers synchronize before use |
| 945 | delete serviceCache; serviceCache = NULL; |
| 946 | } |
| 947 | |
| 948 | UBool |
| 949 | ICUService::acceptsListener(const EventListener& l) const |
| 950 | { |
| 951 | return dynamic_cast<const ServiceListener*>(&l) != NULL; |
| 952 | } |
| 953 | |
| 954 | void |
| 955 | ICUService::notifyListener(EventListener& l) const |
| 956 | { |
| 957 | ((ServiceListener&)l).serviceChanged(*this); |
| 958 | } |
| 959 | |
| 960 | UnicodeString& |
| 961 | ICUService::getName(UnicodeString& result) const |
| 962 | { |
| 963 | return result.append(name); |
| 964 | } |
| 965 | |
| 966 | int32_t |
| 967 | ICUService::countFactories() const |
| 968 | { |
| 969 | return factories == NULL ? 0 : factories->size(); |
| 970 | } |
| 971 | |
| 972 | int32_t |
| 973 | ICUService::getTimestamp() const |
| 974 | { |
| 975 | return timestamp; |
| 976 | } |
| 977 | |
| 978 | U_NAMESPACE_END |
| 979 | |
| 980 | /* UCONFIG_NO_SERVICE */ |
| 981 | #endif |