1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/*
* 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 find time zone-related information about telephony networks.
*
* @hide
*/
public final class TelephonyLookup {
private static final Object sLock = new Object();
@GuardedBy("sLock")
private static TelephonyLookup sInstance;
/**
* Obtains an instance for use when resolving telephony time zone information.
*/
@NonNull
public static TelephonyLookup getInstance() {
synchronized (sLock) {
if (sInstance == null) {
sInstance = new TelephonyLookup(com.android.i18n.timezone.TelephonyLookup
.getInstance());
}
return sInstance;
}
}
@NonNull
private final com.android.i18n.timezone.TelephonyLookup mDelegate;
private TelephonyLookup(@NonNull com.android.i18n.timezone.TelephonyLookup delegate) {
mDelegate = Objects.requireNonNull(delegate);
}
/**
* Returns an object capable of querying telephony network information. This method can return
* {@code null} in the event of an error while reading the underlying data files.
*/
@Nullable
public TelephonyNetworkFinder getTelephonyNetworkFinder() {
com.android.i18n.timezone.TelephonyNetworkFinder telephonyNetworkFinderDelegate =
mDelegate.getTelephonyNetworkFinder();
return telephonyNetworkFinderDelegate != null
? new TelephonyNetworkFinder(telephonyNetworkFinderDelegate) : null;
}
}
|
