1 /*
2  * Copyright (C) 2017 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 com.android.systemui.recents.model;
18 
19 import android.util.ArrayMap;
20 
21 import com.android.systemui.shared.recents.model.Task.TaskKey;
22 
23 import com.android.systemui.shared.recents.model.TaskKeyCache;
24 import com.android.systemui.shared.recents.model.TaskKeyLruCache;
25 import java.io.PrintWriter;
26 
27 /**
28  * Like {@link TaskKeyLruCache}, but without LRU functionality.
29  */
30 public class TaskKeyStrongCache<V> extends TaskKeyCache<V> {
31 
32     private static final String TAG = "TaskKeyCache";
33 
34     private final ArrayMap<Integer, V> mCache = new ArrayMap<>();
35 
copyEntries(TaskKeyStrongCache<V> other)36     public final void copyEntries(TaskKeyStrongCache<V> other) {
37         for (int i = other.mKeys.size() - 1; i >= 0; i--) {
38             TaskKey key = other.mKeys.valueAt(i);
39             put(key, other.mCache.get(key.id));
40         }
41     }
42 
dump(String prefix, PrintWriter writer)43     public void dump(String prefix, PrintWriter writer) {
44         String innerPrefix = prefix + "  ";
45         writer.print(prefix); writer.print(TAG);
46         writer.print(" numEntries="); writer.print(mKeys.size());
47         writer.println();
48         int keyCount = mKeys.size();
49         for (int i = 0; i < keyCount; i++) {
50             writer.print(innerPrefix); writer.println(mKeys.get(mKeys.keyAt(i)));
51         }
52     }
53 
54     @Override
getCacheEntry(int id)55     protected V getCacheEntry(int id) {
56         return mCache.get(id);
57     }
58 
59     @Override
putCacheEntry(int id, V value)60     protected void putCacheEntry(int id, V value) {
61         mCache.put(id, value);
62     }
63 
64     @Override
removeCacheEntry(int id)65     protected void removeCacheEntry(int id) {
66         mCache.remove(id);
67     }
68 
69     @Override
evictAllCache()70     protected void evictAllCache() {
71         mCache.clear();
72     }
73 }
74