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/*
* Copyright (C) 2017 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.admin;
import android.annotation.IntDef;
import android.annotation.Nullable;
import android.os.Build;
import android.os.Parcel;
import android.os.Parcelable;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlSerializer;
import java.io.IOException;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.Objects;
/**
* A class containing information about a pending system update.
*/
public final class SystemUpdateInfo implements Parcelable {
/**
* Represents it is unknown whether the system update is a security patch.
*/
public static final int SECURITY_PATCH_STATE_UNKNOWN = 0;
/**
* Represents the system update is not a security patch.
*/
public static final int SECURITY_PATCH_STATE_FALSE = 1;
/**
* Represents the system update is a security patch.
*/
public static final int SECURITY_PATCH_STATE_TRUE = 2;
/** @hide */
@Retention(RetentionPolicy.SOURCE)
@IntDef(prefix = { "SECURITY_PATCH_STATE_" }, value = {
SECURITY_PATCH_STATE_FALSE,
SECURITY_PATCH_STATE_TRUE,
SECURITY_PATCH_STATE_UNKNOWN
})
public @interface SecurityPatchState {}
private static final String ATTR_RECEIVED_TIME = "received-time";
private static final String ATTR_SECURITY_PATCH_STATE = "security-patch-state";
// Tag used to store original build fingerprint to detect when the update is applied.
private static final String ATTR_ORIGINAL_BUILD = "original-build";
private final long mReceivedTime;
@SecurityPatchState
private final int mSecurityPatchState;
private SystemUpdateInfo(long receivedTime, @SecurityPatchState int securityPatchState) {
this.mReceivedTime = receivedTime;
this.mSecurityPatchState = securityPatchState;
}
private SystemUpdateInfo(Parcel in) {
mReceivedTime = in.readLong();
mSecurityPatchState = in.readInt();
}
/** @hide */
@Nullable
public static SystemUpdateInfo of(long receivedTime) {
return receivedTime == -1
? null : new SystemUpdateInfo(receivedTime, SECURITY_PATCH_STATE_UNKNOWN);
}
/** @hide */
@Nullable
public static SystemUpdateInfo of(long receivedTime, boolean isSecurityPatch) {
return receivedTime == -1 ? null : new SystemUpdateInfo(receivedTime,
isSecurityPatch ? SECURITY_PATCH_STATE_TRUE : SECURITY_PATCH_STATE_FALSE);
}
/**
* Gets time when the update was first available in milliseconds since midnight, January 1,
* 1970 UTC.
* @return Time in milliseconds as given by {@link System#currentTimeMillis()}
*/
public long getReceivedTime() {
return mReceivedTime;
}
/**
* Gets whether the update is a security patch.
* @return {@link #SECURITY_PATCH_STATE_FALSE}, {@link #SECURITY_PATCH_STATE_TRUE}, or
* {@link #SECURITY_PATCH_STATE_UNKNOWN}.
*/
@SecurityPatchState
public int getSecurityPatchState() {
return mSecurityPatchState;
}
public static final Creator<SystemUpdateInfo> CREATOR =
new Creator<SystemUpdateInfo>() {
@Override
public SystemUpdateInfo createFromParcel(Parcel in) {
return new SystemUpdateInfo(in);
}
@Override
public SystemUpdateInfo[] newArray(int size) {
return new SystemUpdateInfo[size];
}
};
/** @hide */
public void writeToXml(XmlSerializer out, String tag) throws IOException {
out.startTag(null, tag);
out.attribute(null, ATTR_RECEIVED_TIME, String.valueOf(mReceivedTime));
out.attribute(null, ATTR_SECURITY_PATCH_STATE, String.valueOf(mSecurityPatchState));
out.attribute(null, ATTR_ORIGINAL_BUILD , Build.FINGERPRINT);
out.endTag(null, tag);
}
/** @hide */
@Nullable
public static SystemUpdateInfo readFromXml(XmlPullParser parser) {
// If an OTA has been applied (build fingerprint has changed), discard stale info.
final String buildFingerprint = parser.getAttributeValue(null, ATTR_ORIGINAL_BUILD );
if (!Build.FINGERPRINT.equals(buildFingerprint)) {
return null;
}
final long receivedTime =
Long.parseLong(parser.getAttributeValue(null, ATTR_RECEIVED_TIME));
final int securityPatchState =
Integer.parseInt(parser.getAttributeValue(null, ATTR_SECURITY_PATCH_STATE));
return new SystemUpdateInfo(receivedTime, securityPatchState);
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeLong(getReceivedTime());
dest.writeInt(getSecurityPatchState());
}
@Override
public String toString() {
return String.format("SystemUpdateInfo (receivedTime = %d, securityPatchState = %s)",
mReceivedTime, securityPatchStateToString(mSecurityPatchState));
}
private static String securityPatchStateToString(@SecurityPatchState int state) {
switch (state) {
case SECURITY_PATCH_STATE_FALSE:
return "false";
case SECURITY_PATCH_STATE_TRUE:
return "true";
case SECURITY_PATCH_STATE_UNKNOWN:
return "unknown";
default:
throw new IllegalArgumentException("Unrecognized security patch state: " + state);
}
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
SystemUpdateInfo that = (SystemUpdateInfo) o;
return mReceivedTime == that.mReceivedTime
&& mSecurityPatchState == that.mSecurityPatchState;
}
@Override
public int hashCode() {
return Objects.hash(mReceivedTime, mSecurityPatchState);
}
}
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