| /* |
| * Copyright (C) 2019 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. |
| */ |
| |
| package android.timezone; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| |
| import com.android.internal.annotations.GuardedBy; |
| |
| import java.util.Objects; |
| |
| /** |
| * A class that can be used to find time zones using information like country and offset. |
| * |
| * @hide |
| */ |
| public final class TimeZoneFinder { |
| |
| private static final Object sLock = new Object(); |
| @GuardedBy("sLock") |
| private static TimeZoneFinder sInstance; |
| |
| /** |
| * Obtains the singleton instance. |
| */ |
| @NonNull |
| public static TimeZoneFinder getInstance() { |
| synchronized (sLock) { |
| if (sInstance == null) { |
| sInstance = new TimeZoneFinder(libcore.timezone.TimeZoneFinder.getInstance()); |
| } |
| } |
| return sInstance; |
| } |
| |
| @NonNull |
| private final libcore.timezone.TimeZoneFinder mDelegate; |
| |
| private TimeZoneFinder(@NonNull libcore.timezone.TimeZoneFinder delegate) { |
| mDelegate = Objects.requireNonNull(delegate); |
| } |
| |
| /** |
| * Returns the IANA rules version associated with the data. If there is no version information |
| * or there is a problem reading the file then {@code null} is returned. |
| */ |
| @Nullable |
| public String getIanaVersion() { |
| return mDelegate.getIanaVersion(); |
| } |
| |
| /** |
| * Returns a {@link CountryTimeZones} object associated with the specified country code. |
| * Caching is handled as needed. If the country code is not recognized or there is an error |
| * during lookup this method can return null. |
| */ |
| @Nullable |
| public CountryTimeZones lookupCountryTimeZones(@NonNull String countryIso) { |
| libcore.timezone.CountryTimeZones delegate = mDelegate.lookupCountryTimeZones(countryIso); |
| return delegate == null ? null : new CountryTimeZones(delegate); |
| } |
| } |