Home | History | Annotate | Download | only in java 
      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 
     17 package com.android.tools.layoutlib.java;
     18 
     19 import com.android.tools.layoutlib.create.ReplaceMethodCallsAdapter;
     20 
     21 import java.util.concurrent.TimeUnit;
     22 import 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")
     31 public 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