| /* |
| * Copyright (C) 2022 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.app.time; |
| |
| import android.annotation.CurrentTimeMillisLong; |
| import android.annotation.ElapsedRealtimeLong; |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.annotation.SystemApi; |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| import android.os.ShellCommand; |
| import android.os.SystemClock; |
| |
| import java.io.PrintWriter; |
| import java.util.Objects; |
| |
| /** |
| * A Unix epoch time value with an associated reading from the elapsed realtime clock. |
| * When representing a device's system clock time, the Unix epoch time can be obtained using {@link |
| * System#currentTimeMillis()}. The Unix epoch time might also come from an external source |
| * depending on usage. |
| * |
| * <p>The elapsed realtime clock can be obtained using methods like {@link |
| * SystemClock#elapsedRealtime()} or {@link SystemClock#elapsedRealtimeClock()}. |
| * |
| * @hide |
| */ |
| @SystemApi |
| public final class UnixEpochTime implements Parcelable { |
| @ElapsedRealtimeLong private final long mElapsedRealtimeMillis; |
| @CurrentTimeMillisLong private final long mUnixEpochTimeMillis; |
| |
| public UnixEpochTime(@ElapsedRealtimeLong long elapsedRealtimeMillis, |
| long unixEpochTimeMillis) { |
| mElapsedRealtimeMillis = elapsedRealtimeMillis; |
| mUnixEpochTimeMillis = unixEpochTimeMillis; |
| } |
| |
| /** @hide */ |
| @NonNull |
| public static UnixEpochTime parseCommandLineArgs(ShellCommand cmd) { |
| Long elapsedRealtimeMillis = null; |
| Long unixEpochTimeMillis = null; |
| String opt; |
| while ((opt = cmd.getNextArg()) != null) { |
| switch (opt) { |
| case "--elapsed_realtime": { |
| elapsedRealtimeMillis = Long.parseLong(cmd.getNextArgRequired()); |
| break; |
| } |
| case "--unix_epoch_time": { |
| unixEpochTimeMillis = Long.parseLong(cmd.getNextArgRequired()); |
| break; |
| } |
| default: { |
| throw new IllegalArgumentException("Unknown option: " + opt); |
| } |
| } |
| } |
| |
| if (elapsedRealtimeMillis == null) { |
| throw new IllegalArgumentException("No elapsedRealtimeMillis specified."); |
| } |
| if (unixEpochTimeMillis == null) { |
| throw new IllegalArgumentException("No unixEpochTimeMillis specified."); |
| } |
| return new UnixEpochTime(elapsedRealtimeMillis, unixEpochTimeMillis); |
| } |
| |
| /** @hide */ |
| public static void printCommandLineOpts(PrintWriter pw) { |
| pw.println("UnixEpochTime options:\n"); |
| pw.println(" --elapsed_realtime <elapsed realtime millis>"); |
| pw.println(" --unix_epoch_time <Unix epoch time millis>"); |
| pw.println(); |
| pw.println("See " + UnixEpochTime.class.getName() + " for more information"); |
| } |
| |
| /** Returns the elapsed realtime clock value. See {@link UnixEpochTime} for more information. */ |
| @ElapsedRealtimeLong |
| public long getElapsedRealtimeMillis() { |
| return mElapsedRealtimeMillis; |
| } |
| |
| /** Returns the unix epoch time value. See {@link UnixEpochTime} for more information. */ |
| @CurrentTimeMillisLong |
| public long getUnixEpochTimeMillis() { |
| return mUnixEpochTimeMillis; |
| } |
| |
| @Override |
| public boolean equals(@Nullable Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| UnixEpochTime that = (UnixEpochTime) o; |
| return mElapsedRealtimeMillis == that.mElapsedRealtimeMillis |
| && mUnixEpochTimeMillis == that.mUnixEpochTimeMillis; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(mElapsedRealtimeMillis, mUnixEpochTimeMillis); |
| } |
| |
| @Override |
| public String toString() { |
| return "UnixEpochTime{" |
| + "mElapsedRealtimeMillis=" + mElapsedRealtimeMillis |
| + ", mUnixEpochTimeMillis=" + mUnixEpochTimeMillis |
| + '}'; |
| } |
| |
| public static final @NonNull Creator<UnixEpochTime> CREATOR = new Creator<>() { |
| @Override |
| public UnixEpochTime createFromParcel(@NonNull Parcel source) { |
| long elapsedRealtimeMillis = source.readLong(); |
| long unixEpochTimeMillis = source.readLong(); |
| return new UnixEpochTime(elapsedRealtimeMillis, unixEpochTimeMillis); |
| } |
| |
| @Override |
| public UnixEpochTime[] newArray(int size) { |
| return new UnixEpochTime[size]; |
| } |
| }; |
| |
| @Override |
| public void writeToParcel(@NonNull Parcel dest, int flags) { |
| dest.writeLong(mElapsedRealtimeMillis); |
| dest.writeLong(mUnixEpochTimeMillis); |
| } |
| |
| @Override |
| public int describeContents() { |
| return 0; |
| } |
| |
| /** |
| * Creates a new Unix epoch time value at {@code elapsedRealtimeTimeMillis} by adjusting this |
| * Unix epoch time by the difference between the elapsed realtime value supplied and the one |
| * associated with this instance. |
| */ |
| @NonNull |
| public UnixEpochTime at(@ElapsedRealtimeLong long elapsedRealtimeTimeMillis) { |
| long adjustedUnixEpochTimeMillis = |
| (elapsedRealtimeTimeMillis - mElapsedRealtimeMillis) + mUnixEpochTimeMillis; |
| return new UnixEpochTime(elapsedRealtimeTimeMillis, adjustedUnixEpochTimeMillis); |
| } |
| |
| /** |
| * Returns the difference in milliseconds between two instance's elapsed realtimes. |
| * |
| * @hide |
| */ |
| public static long elapsedRealtimeDifference( |
| @NonNull UnixEpochTime one, @NonNull UnixEpochTime two) { |
| return one.mElapsedRealtimeMillis - two.mElapsedRealtimeMillis; |
| } |
| } |