1/*
2 * Copyright (C) 2017 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.systemui.util.wakelock;
18
19import android.content.Context;
20import android.os.PowerManager;
21import android.support.annotation.VisibleForTesting;
22
23/** WakeLock wrapper for testability */
24public interface WakeLock {
25
26    /** @see android.os.PowerManager.WakeLock#acquire() */
27    void acquire();
28
29    /** @see android.os.PowerManager.WakeLock#release() */
30    void release();
31
32    /** @see android.os.PowerManager.WakeLock#wrap(Runnable) */
33    Runnable wrap(Runnable r);
34
35    static WakeLock createPartial(Context context, String tag) {
36        return wrap(createPartialInner(context, tag));
37    }
38
39    @VisibleForTesting
40    static PowerManager.WakeLock createPartialInner(Context context, String tag) {
41        return context.getSystemService(PowerManager.class)
42                    .newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, tag);
43    }
44
45    static Runnable wrapImpl(WakeLock w, Runnable r) {
46        w.acquire();
47        return () -> {
48            try {
49                r.run();
50            } finally {
51                w.release();
52            }
53        };
54    }
55
56    static WakeLock wrap(final PowerManager.WakeLock inner) {
57        return new WakeLock() {
58            /** @see PowerManager.WakeLock#acquire() */
59            public void acquire() {
60                inner.acquire();
61            }
62
63            /** @see PowerManager.WakeLock#release() */
64            public void release() {
65                inner.release();
66            }
67
68            /** @see PowerManager.WakeLock#wrap(Runnable) */
69            public Runnable wrap(Runnable runnable) {
70                return wrapImpl(this, runnable);
71            }
72        };
73    }
74}