1 /*
2  * Copyright (C) 2016 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 android.telecom.Logging;
18 
19 import java.util.Collection;
20 import java.util.HashMap;
21 import java.util.Map;
22 
23 /**
24  * @hide
25  */
26 public abstract class TimedEvent<T> {
getTime()27     public abstract long getTime();
getKey()28     public abstract T getKey();
29 
averageTimings(Collection<? extends TimedEvent<T>> events)30     public static <T> Map<T, Double> averageTimings(Collection<? extends TimedEvent<T>> events) {
31         HashMap<T, Integer> counts = new HashMap<>();
32         HashMap<T, Double> result = new HashMap<>();
33 
34         for (TimedEvent<T> entry : events) {
35             if (counts.containsKey(entry.getKey())) {
36                 counts.put(entry.getKey(), counts.get(entry.getKey()) + 1);
37                 result.put(entry.getKey(), result.get(entry.getKey()) + entry.getTime());
38             } else {
39                 counts.put(entry.getKey(), 1);
40                 result.put(entry.getKey(), (double) entry.getTime());
41             }
42         }
43 
44         for (Map.Entry<T, Double> entry : result.entrySet()) {
45             result.put(entry.getKey(), entry.getValue() / counts.get(entry.getKey()));
46         }
47 
48         return result;
49     }
50 }
51