1/* 2 * Copyright (c) 2024-2025 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 { BigIntConstant, BooleanConstant, Constant, NullConstant, NumberConstant, StringConstant, UndefinedConstant } from '../base/Constant'; 17 18export const EMPTY_STRING = ''; 19 20export class ValueUtil { 21 private static readonly NumberConstantCache: Map<number, Constant> = new Map(); 22 public static readonly EMPTY_STRING_CONSTANT = new StringConstant(EMPTY_STRING); 23 24 /* 25 * Set static field to be null, then all related objects could be freed by GC. 26 * Class SdkUtils is only internally used by ArkAnalyzer, the dispose method should be called by users themselves before drop Scene. 27 */ 28 public static dispose(): void { 29 this.NumberConstantCache.clear(); 30 } 31 32 public static getOrCreateNumberConst(n: number): Constant { 33 let constant = this.NumberConstantCache.get(n); 34 if (constant === undefined) { 35 constant = new NumberConstant(n); 36 this.NumberConstantCache.set(n, constant); 37 } 38 return constant; 39 } 40 41 public static createBigIntConst(bigInt: bigint): BigIntConstant { 42 return new BigIntConstant(bigInt); 43 } 44 45 public static createStringConst(str: string): Constant { 46 if (str === EMPTY_STRING) { 47 return this.EMPTY_STRING_CONSTANT; 48 } 49 return new StringConstant(str); 50 } 51 52 public static createConst(str: string): Constant { 53 const n = Number(str); 54 if (!isNaN(n)) { 55 return this.getOrCreateNumberConst(n); 56 } 57 return new StringConstant(str); 58 } 59 60 public static getUndefinedConst(): Constant { 61 return UndefinedConstant.getInstance(); 62 } 63 64 public static getNullConstant(): Constant { 65 return NullConstant.getInstance(); 66 } 67 68 public static getBooleanConstant(value: boolean): Constant { 69 return BooleanConstant.getInstance(value); 70 } 71} 72