70 lines
2.2 KiB
Java
70 lines
2.2 KiB
Java
/*
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* Copyright (C) 2019 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 android.timezone;
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import android.annotation.NonNull;
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import android.annotation.Nullable;
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import com.android.internal.annotations.GuardedBy;
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import java.util.Objects;
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/**
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* A class that can find time zone-related information about telephony networks.
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*
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* @hide
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*/
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public final class TelephonyLookup {
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private static final Object sLock = new Object();
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@GuardedBy("sLock")
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private static TelephonyLookup sInstance;
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/**
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* Obtains an instance for use when resolving telephony time zone information.
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*/
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@NonNull
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public static TelephonyLookup getInstance() {
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synchronized (sLock) {
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if (sInstance == null) {
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sInstance = new TelephonyLookup(com.android.i18n.timezone.TelephonyLookup
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.getInstance());
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}
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return sInstance;
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}
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}
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@NonNull
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private final com.android.i18n.timezone.TelephonyLookup mDelegate;
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private TelephonyLookup(@NonNull com.android.i18n.timezone.TelephonyLookup delegate) {
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mDelegate = Objects.requireNonNull(delegate);
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}
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/**
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* Returns an object capable of querying telephony network information. This method can return
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* {@code null} in the event of an error while reading the underlying data files.
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*/
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@Nullable
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public TelephonyNetworkFinder getTelephonyNetworkFinder() {
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com.android.i18n.timezone.TelephonyNetworkFinder telephonyNetworkFinderDelegate =
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mDelegate.getTelephonyNetworkFinder();
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return telephonyNetworkFinderDelegate != null
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? new TelephonyNetworkFinder(telephonyNetworkFinderDelegate) : null;
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}
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}
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