1/** 2 * Copyright (c) 2021-2022 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 */ 15 16import { Log } from '../utils/Log'; 17 18const TAG = "SingleInstanceHelper"; 19 20export default function createOrGet<T>(objectClass: { new(): T }, storageKey: string): T { 21 if (!globalThis[storageKey]) { 22 globalThis[storageKey] = new objectClass(); 23 Log.debug(TAG, `Create key of ${storageKey}`); 24 } 25 return globalThis[storageKey]; 26}