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