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1 | /** | |
2 | ******************************************************************************* | |
3 | * Copyright (C) 2001-2012, 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(" id: "); | |
106 | result.append(_id); | |
107 | return result; | |
108 | } | |
109 | ||
110 | UnicodeString& | |
111 | ICUServiceKey::debugClass(UnicodeString& result) const | |
112 | { | |
113 | return result.append("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(" id: "); | |
174 | toAppendTo.append(_id); | |
175 | toAppendTo.append(", visible: "); | |
176 | toAppendTo.append(_visible ? "T" : "F"); | |
177 | return toAppendTo; | |
178 | } | |
179 | ||
180 | UnicodeString& | |
181 | SimpleFactory::debugClass(UnicodeString& toAppendTo) const | |
182 | { | |
183 | return toAppendTo.append("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 = -1;;) { | |
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 = -1; | |
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 = -1; | |
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 |