490e46e01b
- Year 2018 is picked as the new time zone data
for picker is introduced in 2018. I can be adjusted
in the future to show more merged time zones.
- Add test to ensure each region has at least
one time zone.
- Fix a issue not using a singleton of TimeZoneData
in commit 6c33caad4b
Bug: 72142943
Test: atest SettingsUnitTests:TimeZoneDataTest
Change-Id: I5eba7fbd59a2d3fd2e8062c9615946dc4bbb6314
100 lines
3.6 KiB
Java
100 lines
3.6 KiB
Java
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.settings.datetime.timezone.model;
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import android.support.annotation.VisibleForTesting;
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import android.support.v4.util.ArraySet;
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import libcore.util.CountryTimeZones;
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import libcore.util.CountryZonesFinder;
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import libcore.util.TimeZoneFinder;
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import java.lang.ref.WeakReference;
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import java.util.Collections;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Locale;
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import java.util.Set;
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/**
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* Wrapper of CountryZonesFinder to normalize the country code and only show the regions that are
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* has time zone shown in the time zone picker.
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* getInstance() reads the data from underlying file, and this means it should not be called
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* from the UI thread.
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*/
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public class TimeZoneData {
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private static WeakReference<TimeZoneData> sCache = null;
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private final CountryZonesFinder mCountryZonesFinder;
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private final Set<String> mRegionIds;
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public static synchronized TimeZoneData getInstance() {
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TimeZoneData data = sCache == null ? null : sCache.get();
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if (data != null) {
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return data;
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}
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data = new TimeZoneData(TimeZoneFinder.getInstance().getCountryZonesFinder());
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sCache = new WeakReference<>(data);
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return data;
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}
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@VisibleForTesting
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public TimeZoneData(CountryZonesFinder countryZonesFinder) {
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mCountryZonesFinder = countryZonesFinder;
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mRegionIds = getNormalizedRegionIds(mCountryZonesFinder.lookupAllCountryIsoCodes());
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}
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public Set<String> getRegionIds() {
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return mRegionIds;
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}
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public Set<String> lookupCountryCodesForZoneId(String tzId) {
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if (tzId == null) {
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return Collections.emptySet();
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}
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List<CountryTimeZones> countryTimeZones = mCountryZonesFinder
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.lookupCountryTimeZonesForZoneId(tzId);
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Set<String> regionIds = new ArraySet<>();
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for (CountryTimeZones countryTimeZone : countryTimeZones) {
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FilteredCountryTimeZones filteredZones = new FilteredCountryTimeZones(countryTimeZone);
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if (filteredZones.getTimeZoneIds().contains(tzId)) {
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regionIds.add(filteredZones.getRegionId());
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}
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}
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return regionIds;
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}
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public FilteredCountryTimeZones lookupCountryTimeZones(String regionId) {
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CountryTimeZones finder = regionId == null ? null
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: mCountryZonesFinder.lookupCountryTimeZones(regionId);
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return finder == null ? null : new FilteredCountryTimeZones(finder);
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}
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private static Set<String> getNormalizedRegionIds(List<String> regionIds) {
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final Set<String> result = new HashSet<>(regionIds.size());
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for (String regionId : regionIds) {
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result.add(normalizeRegionId(regionId));
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}
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return Collections.unmodifiableSet(result);
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}
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// Uppercase ASCII is normalized for the purpose of using ICU API
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public static String normalizeRegionId(String regionId) {
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return regionId == null ? null : regionId.toUpperCase(Locale.US);
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}
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}
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