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.tools.layoutlib.java;
18
19import com.android.tools.layoutlib.create.ReplaceMethodCallsAdapter;
20
21import java.util.concurrent.TimeUnit;
22import java.util.concurrent.atomic.AtomicLong;
23
24/**
25 * Provides dummy implementation of methods that don't exist on the host VM.
26 * This also providers a time control that allows to set a specific system time.
27 *
28 * @see ReplaceMethodCallsAdapter
29 */
30@SuppressWarnings("unused")
31public class System_Delegate {
32    // Current system time
33    private static AtomicLong mNanosTime = new AtomicLong(System.nanoTime());
34    // Time that the system booted up in nanos
35    private static AtomicLong mBootNanosTime = new AtomicLong(System.nanoTime());
36
37    public static void log(String message) {
38        // ignore.
39    }
40
41    public static void log(String message, Throwable th) {
42        // ignore.
43    }
44
45    public static void setNanosTime(long nanos) {
46        mNanosTime.set(nanos);
47    }
48
49    public static void setBootTimeNanos(long nanos) {
50        mBootNanosTime.set(nanos);
51    }
52
53    public static long nanoTime() {
54        return mNanosTime.get();
55    }
56
57    public static long currentTimeMillis() {
58        return TimeUnit.NANOSECONDS.toMillis(mNanosTime.get());
59    }
60
61    public static long bootTime() {
62        return mBootNanosTime.get();
63    }
64
65    public static long bootTimeMillis() {
66        return TimeUnit.NANOSECONDS.toMillis(mBootNanosTime.get());
67    }
68}
69