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 26 public void clear() { 27 mMap.clear(); 28 } 29 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