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