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
16export class CheckEmptyUtils {
17
18  /**
19     * Check obj is empty.
20     *
21     * @param {Object} obj need checked object
22     * @return {boolean} true(empty)
23     */
24  static isEmpty(obj) {
25    return (typeof obj === 'undefined' || obj === null || obj === '' || Object.keys(obj).length === 0);
26  }
27
28  /**
29     * Check str is empty.
30     *
31     * @param {string} str need checked string
32     * @return {boolean} true(empty)
33     */
34  static checkStrIsEmpty(str) {
35    return str.trim().length === 0;
36  }
37
38  /**
39     * Check array is empty.
40     *
41     * @param {Array} arr need checked array
42     * @return {boolean} true(empty)
43     */
44  static isEmptyArr(arr) {
45    return arr.length === 0;
46  }
47}