blob: 263d7821a085be9fea0aa9785b600d678a6b041b (
plain)
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
|
/*
* Copyright (C) 2011 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.util;
/**
* Interface that provides trusted time information, possibly coming from an NTP
* server. Implementations may cache answers until {@link #forceRefresh()}.
*
* @hide
*/
public interface TrustedTime {
/**
* Force update with an external trusted time source, returning {@code true}
* when successful.
*/
public boolean forceRefresh();
/**
* Check if this instance has cached a response from a trusted time source.
*/
public boolean hasCache();
/**
* Return time since last trusted time source contact, or
* {@link Long#MAX_VALUE} if never contacted.
*/
public long getCacheAge();
/**
* Return certainty of cached trusted time in milliseconds, or
* {@link Long#MAX_VALUE} if never contacted. Smaller values are more
* precise.
*/
public long getCacheCertainty();
/**
* Return current time similar to {@link System#currentTimeMillis()},
* possibly using a cached authoritative time source.
*/
public long currentTimeMillis();
}
|
