1/* 2 * Copyright (c) 2021 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 16/** 17 * @file 18 * @kit BasicServicesKit 19 */ 20 21import { AsyncCallback, BusinessError } from './@ohos.base'; 22 23/** 24 * The interface of system parameters class. 25 * 26 * @namespace systemParameter 27 * @syscap SystemCapability.Startup.SystemInfo 28 * @systemapi Hide this for inner system use. 29 * @since 6 30 * @deprecated since 9 31 */ 32declare namespace systemParameter { 33 /** 34 * Gets the value of the attribute with the specified key. 35 * 36 * @param { string } key Key of the system attribute. 37 * @param { string } def Default value. 38 * @returns { string } if the parameter is empty or doesn't exist, empty string will be returned. 39 * @syscap SystemCapability.Startup.SystemInfo 40 * @systemapi Hide this for inner system use. 41 * @since 6 42 * @deprecated since 9 43 */ 44 function getSync(key: string, def?: string): string; 45 46 /** 47 * Gets the value of the attribute with the specified key. 48 * 49 * @param { string } key Key of the system attribute. 50 * @param { AsyncCallback<string> } callback Callback function. 51 * @syscap SystemCapability.Startup.SystemInfo 52 * @systemapi Hide this for inner system use. 53 * @since 6 54 * @deprecated since 9 55 */ 56 function get(key: string, callback: AsyncCallback<string>): void; 57 58 /** 59 * Gets the value of the attribute with the specified key. 60 * 61 * @param { string } key Key of the system attribute. 62 * @param { string } def Default value. 63 * @param { AsyncCallback<string> } callback Callback function. 64 * @syscap SystemCapability.Startup.SystemInfo 65 * @systemapi Hide this for inner system use. 66 * @since 6 67 * @deprecated since 9 68 */ 69 function get(key: string, def: string, callback: AsyncCallback<string>): void; 70 71 /** 72 * Gets the value of the attribute with the specified key. 73 * 74 * @param { string } key Key of the system attribute. 75 * @param { string } def Default value. 76 * @returns { Promise<string> } , which is used to obtain the result asynchronously. 77 * @syscap SystemCapability.Startup.SystemInfo 78 * @systemapi Hide this for inner system use. 79 * @since 6 80 * @deprecated since 9 81 */ 82 function get(key: string, def?: string): Promise<string>; 83 84 /** 85 * Sets a value for the attribute with the specified key. 86 * 87 * @param { string } key Key of the system attribute. 88 * @param { string } value value System attribute value to set. 89 * @syscap SystemCapability.Startup.SystemInfo 90 * @systemapi Hide this for inner system use. 91 * @since 6 92 * @deprecated since 9 93 */ 94 function setSync(key: string, value: string): void; 95 96 /** 97 * Sets a value for the attribute with the specified key. 98 * 99 * @param { string } key Key of the system attribute. 100 * @param { string } value System attribute value to set. 101 * @param { AsyncCallback<void> } callback Callback function. 102 * @syscap SystemCapability.Startup.SystemInfo 103 * @systemapi Hide this for inner system use. 104 * @since 6 105 * @deprecated since 9 106 */ 107 function set(key: string, value: string, callback: AsyncCallback<void>): void; 108 109 /** 110 * Sets a value for the attribute with the specified key. 111 * 112 * @param { string } key Key of the system attribute. 113 * @param { string } value Default value. 114 * @returns { Promise<void> } which is used to obtain the result asynchronously. 115 * @syscap SystemCapability.Startup.SystemInfo 116 * @systemapi Hide this for inner system use. 117 * @since 6 118 * @deprecated since 9 119 */ 120 function set(key: string, value: string): Promise<void>; 121} 122 123export default systemParameter; 124