| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define LOG_TAG "TimeZoneNames" |
| |
| #include "IcuUtilities.h" |
| #include "JNIHelp.h" |
| #include "JniConstants.h" |
| #include "JniException.h" |
| #include "ScopedJavaUnicodeString.h" |
| #include "ScopedLocalRef.h" |
| #include "ScopedUtfChars.h" |
| #include "UniquePtr.h" |
| #include "unicode/calendar.h" |
| #include "unicode/timezone.h" |
| #include "unicode/tznames.h" |
| |
| static bool isUtc(const UnicodeString& id) { |
| static const UnicodeString kEtcUct("Etc/UCT", 7, US_INV); |
| static const UnicodeString kEtcUtc("Etc/UTC", 7, US_INV); |
| static const UnicodeString kEtcUniversal("Etc/Universal", 13, US_INV); |
| static const UnicodeString kEtcZulu("Etc/Zulu", 8, US_INV); |
| |
| static const UnicodeString kUct("UCT", 3, US_INV); |
| static const UnicodeString kUtc("UTC", 3, US_INV); |
| static const UnicodeString kUniversal("Universal", 9, US_INV); |
| static const UnicodeString kZulu("Zulu", 4, US_INV); |
| |
| return id == kEtcUct || id == kEtcUtc || id == kEtcUniversal || id == kEtcZulu || |
| id == kUct || id == kUtc || id == kUniversal || id == kZulu; |
| } |
| |
| static bool setStringArrayElement(JNIEnv* env, jobjectArray array, int i, const UnicodeString& s) { |
| // Fill in whatever we got. We don't use the display names if they're "GMT[+-]xx:xx" |
| // because icu4c doesn't use the up-to-date time zone transition data, so it gets these |
| // wrong. TimeZone.getDisplayName creates accurate names on demand. |
| // TODO: investigate whether it's worth doing that work once in the Java wrapper instead of on-demand. |
| static const UnicodeString kGmt("GMT", 3, US_INV); |
| if (!s.isBogus() && !s.startsWith(kGmt)) { |
| ScopedLocalRef<jstring> javaString(env, env->NewString(s.getBuffer(), s.length())); |
| if (javaString.get() == NULL) { |
| return false; |
| } |
| env->SetObjectArrayElement(array, i, javaString.get()); |
| } |
| return true; |
| } |
| |
| static void TimeZoneNames_fillZoneStrings(JNIEnv* env, jclass, jstring localeName, jobjectArray result) { |
| Locale locale = getLocale(env, localeName); |
| |
| UErrorCode status = U_ZERO_ERROR; |
| UniquePtr<TimeZoneNames> names(TimeZoneNames::createInstance(locale, status)); |
| if (maybeThrowIcuException(env, "TimeZoneNames::createInstance", status)) { |
| return; |
| } |
| |
| const UDate now(Calendar::getNow()); |
| |
| static const UnicodeString kUtc("UTC", 3, US_INV); |
| static const UnicodeString pacific_apia("Pacific/Apia", 12, US_INV); |
| |
| size_t id_count = env->GetArrayLength(result); |
| for (size_t i = 0; i < id_count; ++i) { |
| ScopedLocalRef<jobjectArray> java_row(env, |
| reinterpret_cast<jobjectArray>(env->GetObjectArrayElement(result, i))); |
| ScopedLocalRef<jstring> java_zone_id(env, |
| reinterpret_cast<jstring>(env->GetObjectArrayElement(java_row.get(), 0))); |
| ScopedJavaUnicodeString zone_id(env, java_zone_id.get()); |
| if (!zone_id.valid()) { |
| return; |
| } |
| |
| UnicodeString long_std; |
| names->getDisplayName(zone_id.unicodeString(), UTZNM_LONG_STANDARD, now, long_std); |
| UnicodeString short_std; |
| names->getDisplayName(zone_id.unicodeString(), UTZNM_SHORT_STANDARD, now, short_std); |
| UnicodeString long_dst; |
| names->getDisplayName(zone_id.unicodeString(), UTZNM_LONG_DAYLIGHT, now, long_dst); |
| UnicodeString short_dst; |
| names->getDisplayName(zone_id.unicodeString(), UTZNM_SHORT_DAYLIGHT, now, short_dst); |
| |
| if (isUtc(zone_id.unicodeString())) { |
| // ICU doesn't have names for the UTC zones; it just says "GMT+00:00" for both |
| // long and short names. We don't want this. The best we can do is use "UTC" |
| // for everything (since we don't know how to say "Universal Coordinated Time" in |
| // every language). |
| // TODO: check CLDR doesn't actually have this somewhere. |
| long_std = short_std = long_dst = short_dst = kUtc; |
| } else if (zone_id.unicodeString() == pacific_apia) { |
| // icu4c 50 doesn't know Samoa has DST yet. http://b/7955614 |
| if (long_dst.isBogus()) { |
| long_dst = "Samoa Daylight Time"; |
| } |
| } |
| |
| bool okay = |
| setStringArrayElement(env, java_row.get(), 1, long_std) && |
| setStringArrayElement(env, java_row.get(), 2, short_std) && |
| setStringArrayElement(env, java_row.get(), 3, long_dst) && |
| setStringArrayElement(env, java_row.get(), 4, short_dst); |
| if (!okay) { |
| return; |
| } |
| } |
| } |
| |
| static jstring TimeZoneNames_getExemplarLocation(JNIEnv* env, jclass, jstring javaLocale, jstring javaTz) { |
| Locale locale = getLocale(env, javaLocale); |
| |
| UErrorCode status = U_ZERO_ERROR; |
| UniquePtr<TimeZoneNames> names(TimeZoneNames::createInstance(locale, status)); |
| if (maybeThrowIcuException(env, "TimeZoneNames::createInstance", status)) { |
| return NULL; |
| } |
| |
| ScopedJavaUnicodeString tz(env, javaTz); |
| if (!tz.valid()) { |
| return NULL; |
| } |
| |
| UnicodeString s; |
| const UDate now(Calendar::getNow()); |
| names->getDisplayName(tz.unicodeString(), UTZNM_EXEMPLAR_LOCATION, now, s); |
| return env->NewString(s.getBuffer(), s.length()); |
| } |
| |
| static JNINativeMethod gMethods[] = { |
| NATIVE_METHOD(TimeZoneNames, fillZoneStrings, "(Ljava/lang/String;[[Ljava/lang/String;)V"), |
| NATIVE_METHOD(TimeZoneNames, getExemplarLocation, "(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;"), |
| }; |
| void register_libcore_icu_TimeZoneNames(JNIEnv* env) { |
| jniRegisterNativeMethods(env, "libcore/icu/TimeZoneNames", gMethods, NELEM(gMethods)); |
| } |