| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.systemui.util.leak; |
| |
| import java.util.Collection; |
| import java.util.WeakHashMap; |
| |
| /** |
| * Tracks instances of classes. |
| */ |
| public class TrackedObjects { |
| |
| private final TrackedCollections mTrackedCollections; |
| private final WeakHashMap<Class<?>, TrackedClass<?>> mTrackedClasses = new WeakHashMap<>(); |
| |
| public TrackedObjects(TrackedCollections trackedCollections) { |
| mTrackedCollections = trackedCollections; |
| } |
| |
| /** |
| * @see LeakDetector#trackInstance(Object) |
| */ |
| public synchronized <T> void track(T object) { |
| Class<?> clazz = object.getClass(); |
| @SuppressWarnings("unchecked") |
| TrackedClass<T> trackedClass = (TrackedClass<T>) mTrackedClasses.get(clazz); |
| |
| if (trackedClass == null) { |
| trackedClass = new TrackedClass<T>(); |
| mTrackedClasses.put(clazz, trackedClass); |
| } |
| |
| trackedClass.track(object); |
| mTrackedCollections.track(trackedClass, clazz.getName()); |
| } |
| |
| public static boolean isTrackedObject(Collection<?> collection) { |
| return collection instanceof TrackedClass; |
| } |
| |
| private static class TrackedClass<T> extends AbstractCollection<T> { |
| final WeakIdentityHashMap<T, Void> instances = new WeakIdentityHashMap<>(); |
| |
| void track(T object) { |
| instances.put(object, null); |
| } |
| |
| @Override |
| public int size() { |
| return instances.size(); |
| } |
| |
| @Override |
| public boolean isEmpty() { |
| return instances.isEmpty(); |
| } |
| |
| } |
| |
| } |