1 /*
2  * Copyright (C) 2011 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 androidx.media.filterfw;
18 
19 import java.util.LinkedHashMap;
20 import java.util.Map;
21 
22 /**
23  * This is a simple LRU cache that is used internally for managing repetitive objects.
24  */
25 class SimpleCache<K, V> extends LinkedHashMap<K, V> {
26 
27     private int mMaxEntries;
28 
SimpleCache(final int maxEntries)29     public SimpleCache(final int maxEntries) {
30         super(maxEntries + 1, 1f, true);
31         mMaxEntries = maxEntries;
32     }
33 
34     @Override
removeEldestEntry(final Map.Entry<K, V> eldest)35     protected boolean removeEldestEntry(final Map.Entry<K, V> eldest) {
36         return super.size() > mMaxEntries;
37     }
38 }
39