1 /*
2  * Copyright (C) 2012 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.inputmethod.keyboard.internal;
18 
19 import com.android.inputmethod.keyboard.Key;
20 
21 import java.util.HashMap;
22 
23 public final class KeysCache {
24     private final HashMap<Key, Key> mMap = new HashMap<>();
25 
clear()26     public void clear() {
27         mMap.clear();
28     }
29 
get(final Key key)30     public Key get(final Key key) {
31         final Key existingKey = mMap.get(key);
32         if (existingKey != null) {
33             // Reuse the existing element that equals to "key" without adding "key" to the map.
34             return existingKey;
35         }
36         mMap.put(key, key);
37         return key;
38     }
39 }
40