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/*
* 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();
}
}
}
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