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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
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8  * particular file as subject to the "Classpath" exception as provided
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11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
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24  */
25 package java.time.format;
26 
27 import android.icu.text.TimeZoneNames;
28 import android.icu.util.TimeZone;
29 import android.icu.util.ULocale;
30 import java.util.Locale;
31 import java.util.Map;
32 
33 /**
34  * A helper class to map a zone name to metazone and back to the
35  * appropriate zone id for the particular locale.
36  * <p>
37  * The zid<->metazone mappings are based on CLDR metaZones.xml.
38  * The alias mappings are based on Link entries in tzdb data files and
39  * CLDR's supplementalMetadata.xml.
40  */
41 class ZoneName {
42 
toZid(String zid, Locale locale)43     public static String toZid(String zid, Locale locale) {
44         // Android-changed: delegate to ICU.
45         TimeZoneNames tzNames = TimeZoneNames.getInstance(locale);
46         if (tzNames.getAvailableMetaZoneIDs().contains(zid)) {
47             // Compare TimeZoneFormat#getTargetRegion.
48             ULocale uLocale = ULocale.forLocale(locale);
49             String region = uLocale.getCountry();
50             if (region.length() == 0) {
51                 uLocale = ULocale.addLikelySubtags(uLocale);
52                 region = uLocale.getCountry();
53             }
54             zid = tzNames.getReferenceZoneID(zid, region);
55         }
56         return toZid(zid);
57     }
58 
toZid(String zid)59     public static String toZid(String zid) {
60         // Android-changed: Use ICU TimeZone.getCanonicalID().
61         String canonicalCldrId = getSystemCanonicalID(zid);
62         if (canonicalCldrId != null) {
63             return canonicalCldrId;
64         }
65         return zid;
66     }
67 
68     // BEGIN Android-added: Get non-custom system canonical time zone Id from ICU.
getSystemCanonicalID(String zid)69     public static String getSystemCanonicalID(String zid) {
70         if (TimeZone.UNKNOWN_ZONE_ID.equals(zid)) {
71             return zid;
72         }
73         boolean[] isSystemID = { false };
74         String canonicalID = TimeZone.getCanonicalID(zid, isSystemID);
75         if (canonicalID == null || !isSystemID[0]) {
76             return null;
77         }
78         return canonicalID;
79     }
80     // END Android-added: Get non-custom system canonical time zone Id from ICU.
81 
82     // Android-removed: zidMap and aliasMap containing zone id data.
83     // Android-removed: zidToMzone, mzoneToZid, mzoneToZidL, aliases and their initialization code.
84 }
85