| /* |
| * Copyright (C) 2018 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 com.android.server.timedetector; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.app.timedetector.TimeSignal; |
| import android.util.TimestampedValue; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| |
| /** |
| * The interface for classes that implement the time detection algorithm used by the |
| * TimeDetectorService. |
| * |
| * @hide |
| */ |
| public interface TimeDetectorStrategy { |
| |
| interface Callback { |
| void setTime(TimestampedValue<Long> time); |
| } |
| |
| void initialize(@NonNull Callback callback); |
| void suggestTime(@NonNull TimeSignal timeSignal); |
| void dump(@NonNull FileDescriptor fd, @NonNull PrintWriter pw, @Nullable String[] args); |
| |
| // Utility methods below are to be moved to a better home when one becomes more obvious. |
| |
| /** |
| * Adjusts the supplied time value by applying the difference between the reference time |
| * supplied and the reference time associated with the time. |
| */ |
| static long getTimeAt(@NonNull TimestampedValue<Long> timeValue, long referenceClockMillisNow) { |
| return (referenceClockMillisNow - timeValue.getReferenceTimeMillis()) |
| + timeValue.getValue(); |
| } |
| } |