1/* 2 * Copyright (c) 2022 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15import { MediaDataItem } from './MediaDataItem'; 16import createOrGet from '../utils/SingleInstanceUtils'; 17 18const TAG = "MediaDataItemCache" 19 20class MediaDataItemCache { 21 private mediaDataItemMap = new Map<string, MediaDataItem>(); 22 23 hasKey(key: string): boolean { 24 return this.mediaDataItemMap.has(key); 25 } 26 27 deleteKey(key: string): boolean { 28 return this.mediaDataItemMap.delete(key); 29 } 30 31 set(key: string, value: MediaDataItem): void { 32 this.mediaDataItemMap.set(key, value); 33 } 34 35 get(key: string): MediaDataItem { 36 return this.mediaDataItemMap.get(key); 37 } 38 39 clearAll(): void { 40 this.mediaDataItemMap.clear(); 41 } 42} 43 44let mediaDataItemCache = createOrGet(MediaDataItemCache, TAG); 45 46export default mediaDataItemCache as MediaDataItemCache;