1 /*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define LOG_TAG "TimeZoneNames"
18
19 #include <memory>
20
21 #include <nativehelper/JNIHelp.h>
22 #include <nativehelper/ScopedLocalRef.h>
23 #include <nativehelper/ScopedUtfChars.h>
24 #include <nativehelper/jni_macros.h>
25
26 #include "IcuUtilities.h"
27 #include "JniException.h"
28 #include "ScopedIcuLocale.h"
29 #include "ScopedJavaUnicodeString.h"
30 #include "unicode/calendar.h"
31 #include "unicode/timezone.h"
32 #include "unicode/tznames.h"
33
setStringArrayElement(JNIEnv * env,jobjectArray array,int i,const icu::UnicodeString & s)34 static bool setStringArrayElement(JNIEnv* env, jobjectArray array, int i, const icu::UnicodeString& s) {
35 // Don't use "GMT" string, for backwards compatibility.
36 static const icu::UnicodeString kGmt("GMT", 3, US_INV);
37 if (!s.isBogus() && !s.startsWith(kGmt)) {
38 ScopedLocalRef<jstring> javaString(env, jniCreateString(env, s.getBuffer(), s.length()));
39 if (javaString.get() == NULL) {
40 return false;
41 }
42 env->SetObjectArrayElement(array, i, javaString.get());
43 }
44 return true;
45 }
46
TimeZoneNames_fillZoneStrings(JNIEnv * env,jclass,jstring javaLocaleName,jobjectArray result)47 static void TimeZoneNames_fillZoneStrings(JNIEnv* env, jclass, jstring javaLocaleName, jobjectArray result) {
48 ScopedIcuLocale icuLocale(env, javaLocaleName);
49 if (!icuLocale.valid()) {
50 return;
51 }
52
53 UErrorCode status = U_ZERO_ERROR;
54 std::unique_ptr<icu::TimeZoneNames> names(icu::TimeZoneNames::createInstance(icuLocale.locale(), status));
55 if (maybeThrowIcuException(env, "TimeZoneNames::createInstance", status)) {
56 return;
57 }
58
59 const UDate now(icu::Calendar::getNow());
60
61 size_t id_count = env->GetArrayLength(result);
62 for (size_t i = 0; i < id_count; ++i) {
63 ScopedLocalRef<jobjectArray> java_row(env,
64 reinterpret_cast<jobjectArray>(env->GetObjectArrayElement(result, i)));
65 ScopedLocalRef<jstring> java_zone_id(env,
66 reinterpret_cast<jstring>(env->GetObjectArrayElement(java_row.get(), 0)));
67 ScopedJavaUnicodeString zone_id(env, java_zone_id.get());
68 if (!zone_id.valid()) {
69 return;
70 }
71
72 // Canonicalize the zone ID to the one known by ICU.
73 icu::UnicodeString lookup_id;
74 icu::TimeZone::getCanonicalID(zone_id.unicodeString(), lookup_id, status);
75 if (status != U_ZERO_ERROR) {
76 // Unknown ID - just use the zone ID we have.
77 lookup_id = zone_id.unicodeString();
78 }
79
80 icu::UnicodeString long_std;
81 names->getDisplayName(lookup_id, UTZNM_LONG_STANDARD, now, long_std);
82 icu::UnicodeString short_std;
83 names->getDisplayName(lookup_id, UTZNM_SHORT_STANDARD, now, short_std);
84 icu::UnicodeString long_dst;
85 names->getDisplayName(lookup_id, UTZNM_LONG_DAYLIGHT, now, long_dst);
86 icu::UnicodeString short_dst;
87 names->getDisplayName(lookup_id, UTZNM_SHORT_DAYLIGHT, now, short_dst);
88
89 bool okay =
90 setStringArrayElement(env, java_row.get(), 1, long_std) &&
91 setStringArrayElement(env, java_row.get(), 2, short_std) &&
92 setStringArrayElement(env, java_row.get(), 3, long_dst) &&
93 setStringArrayElement(env, java_row.get(), 4, short_dst);
94 if (!okay) {
95 return;
96 }
97 }
98 }
99
100 static JNINativeMethod gMethods[] = {
101 NATIVE_METHOD(TimeZoneNames, fillZoneStrings, "(Ljava/lang/String;[[Ljava/lang/String;)V"),
102 };
register_libcore_icu_TimeZoneNames(JNIEnv * env)103 void register_libcore_icu_TimeZoneNames(JNIEnv* env) {
104 jniRegisterNativeMethods(env, "libcore/icu/TimeZoneNames", gMethods, NELEM(gMethods));
105 }
106