| /* |
| * Copyright (C) 2020 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 com.android.internal.annotations.GuardedBy; |
| |
| import java.util.Objects; |
| |
| /** |
| * Android's internal factory for java.util.TimeZone objects. Provides access to core library time |
| * zone metadata not available via {@link java.util.TimeZone}. |
| * |
| * @hide |
| */ |
| public final class ZoneInfoDb { |
| |
| private static final Object sLock = new Object(); |
| @GuardedBy("sLock") |
| private static ZoneInfoDb sInstance; |
| |
| /** |
| * Obtains the singleton instance. |
| */ |
| @NonNull |
| public static ZoneInfoDb getInstance() { |
| synchronized (sLock) { |
| if (sInstance == null) { |
| sInstance = new ZoneInfoDb(libcore.timezone.ZoneInfoDb.getInstance()); |
| } |
| } |
| return sInstance; |
| } |
| |
| @NonNull |
| private final libcore.timezone.ZoneInfoDb mDelegate; |
| |
| private ZoneInfoDb(libcore.timezone.ZoneInfoDb delegate) { |
| mDelegate = Objects.requireNonNull(delegate); |
| } |
| |
| /** |
| * Returns the tzdb version in use. |
| */ |
| @NonNull |
| public String getVersion() { |
| return mDelegate.getVersion(); |
| } |
| } |