1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.launcher3.compat;
18
19import android.annotation.TargetApi;
20import android.content.Context;
21import android.os.Build;
22import android.os.UserManager;
23
24import com.android.launcher3.util.LongArrayMap;
25
26import java.util.HashMap;
27
28@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
29public class UserManagerCompatV17 extends UserManagerCompatV16 {
30
31    protected LongArrayMap<UserHandleCompat> mUsers;
32    // Create a separate reverse map as LongArrayMap.indexOfValue checks if objects are same
33    // and not {@link Object#equals}
34    protected HashMap<UserHandleCompat, Long> mUserToSerialMap;
35
36    protected UserManager mUserManager;
37
38    UserManagerCompatV17(Context context) {
39        mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
40    }
41
42    public long getSerialNumberForUser(UserHandleCompat user) {
43        synchronized (this) {
44            if (mUserToSerialMap != null) {
45                Long serial = mUserToSerialMap.get(user);
46                return serial == null ? 0 : serial;
47            }
48        }
49        return mUserManager.getSerialNumberForUser(user.getUser());
50    }
51
52    public UserHandleCompat getUserForSerialNumber(long serialNumber) {
53        synchronized (this) {
54            if (mUsers != null) {
55                return mUsers.get(serialNumber);
56            }
57        }
58        return UserHandleCompat.fromUser(mUserManager.getUserForSerialNumber(serialNumber));
59    }
60
61    @Override
62    public void enableAndResetCache() {
63        synchronized (this) {
64            mUsers = new LongArrayMap<>();
65            mUserToSerialMap = new HashMap<>();
66            UserHandleCompat myUser = UserHandleCompat.myUserHandle();
67            long serial = mUserManager.getSerialNumberForUser(myUser.getUser());
68            mUsers.put(serial, myUser);
69            mUserToSerialMap.put(myUser, serial);
70        }
71    }
72}
73
74