1/* 2 * Copyright (c) 2023-2023 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 { GlobalObject } from './GlobalObject'; 16import { Log } from './Log'; 17 18const TAG: string = 'SingletonHelper'; 19/** 20 * 获取单例类 21 */ 22export class SingletonHelper { 23 static getInstance<T>(clazz: { new(): T }, key: string): T { 24 if (!GlobalObject.getInstance().hasObject(key)) { 25 GlobalObject.getInstance().setObject(key, new clazz()); 26 Log.info(TAG, `Create key of ${key}`); 27 } 28 return GlobalObject.getInstance().getObject(key) as T; 29 } 30}