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A library jar that provides APIs for Applications written for the Google Android Platform.

There is a newer version: 15-robolectric-12650502

/*
 * 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, TrackedClass> mTrackedClasses = new WeakHashMap<>();

    public TrackedObjects(TrackedCollections trackedCollections) {
        mTrackedCollections = trackedCollections;
    }

    /**
     * @see LeakDetector#trackInstance(Object)
     */
    public synchronized  void track(T object) {
        Class clazz = object.getClass();
        @SuppressWarnings("unchecked")
        TrackedClass trackedClass = (TrackedClass) mTrackedClasses.get(clazz);

        if (trackedClass == null) {
            trackedClass = new TrackedClass();
            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 extends AbstractCollection {
        final WeakIdentityHashMap 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();
        }

    }

}