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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 | 189x 2x 2x 189x 189x 189x 236x 2x 189x 189x 120x 69x 189x 189x 189x 189x 133x 120x 120x 118x 4x 4x 4x 4x 116x 116x 116x 116x 116x 116x 116x 116x 116x 114x 116x 129x 129x 118x 129x 2x 127x 2x 189x 189x 125x 125x 125x 125x 125x 125x 125x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 5x 5x 5x 5x 5x 1x 124x 122x | /* eslint-disable @typescript-eslint/no-explicit-any */ import {EvaluationException, EvaluationVisitor, LogicalExpression} from '@/NCalc/Domain/index'; import NCalcParser from '@/Grammar/NCalcParser'; import NCalcLexer from '@/Grammar/NCalcLexer'; import {EvaluateOptions} from './EvaluationOptions'; import {EvaluateFunctionHandler, EvaluateParameterHandler} from './types'; import {default as antlr4} from 'antlr4'; import { ErrorListener } from './ErrorListener'; export class Expression { private lexerErrors: ErrorListener; private parserErrors: ErrorListener; public Options: EvaluateOptions = EvaluateOptions.None; /** * Orginal strings representation of the expression */ protected OriginalExpression: string; private static _cacheEnabled = true; private static _compiledExpression: {[key: string]: WeakRef<LogicalExpression>} = {}; public ParsedExpression: LogicalExpression; // eslint-disable-next-line @typescript-eslint/no-explicit-any protected ParameterEnumerators: {[key: string]: any} = {}; protected ParametersBackup: {[key: string]: object} = {}; // eslint-disable-next-line @typescript-eslint/no-explicit-any public Parameters: {[key: string]: any} = {}; public get CacheEnabled() { return Expression._cacheEnabled; } public set CacheEnabled(value: boolean) { Expression._cacheEnabled = value; Iif (value === false) { Expression._compiledExpression = {}; } } public static get CachedExpressions() { return Expression._compiledExpression; } public constructor(expression: LogicalExpression); public constructor(expression: string); public constructor(expression: LogicalExpression, options: EvaluateOptions); public constructor(expression: string, options: EvaluateOptions); public constructor(expression: any, options: EvaluateOptions = EvaluateOptions.None) { Iif (expression == null || expression == '') { throw new Error('The expression cannot be null or empty'); } if (typeof expression === 'string') { this.OriginalExpression = expression; } else { this.ParsedExpression = expression; } if (options) { this.Options = options; } this.lexerErrors = new ErrorListener(); this.parserErrors = new ErrorListener(); } public get errors() { return this.lexerErrors.errors.concat(this.parserErrors.errors); } public Compile(expression: string, nocache: boolean): LogicalExpression { let logicalExpression: LogicalExpression | null = null; if (this.CacheEnabled && !nocache) { if (Object.prototype.hasOwnProperty.call(Expression._compiledExpression, expression)) { const wr = Expression._compiledExpression[expression]; const stored = wr.deref(); if (stored && stored !== undefined) { return stored; } } } if (logicalExpression == null) { // Create the lexer const inputStream = new antlr4.CharStream(expression); const lexer = new NCalcLexer(inputStream); lexer.addErrorListener(this.lexerErrors); // Create parser const tokenStream = new antlr4.CommonTokenStream(lexer); const parser = new NCalcParser(tokenStream); parser.addErrorListener(this.parserErrors); logicalExpression = (parser as any).GetExpression(); if (this.CacheEnabled && !nocache) { Expression._compiledExpression[expression] = new WeakRef(logicalExpression); } } return logicalExpression; } /** * Detects whether the expression has errors. This will simply return a boolean value. * You can access the error by using the `errors` getter. */ public HasErrors(): boolean { try { if (this.ParsedExpression == null) { this.ParsedExpression = this.Compile( this.OriginalExpression, (this.Options & EvaluateOptions.NoCache) == EvaluateOptions.NoCache ); } if (this.errors.length > 0) { throw new Error(); } // In case HasErrors() is called multiple times for the same expression return this.ParsedExpression === null || this.ParsedExpression === undefined; } catch (e) { return true; } } public EvaluateFunction: {[key: string]: EvaluateFunctionHandler} = {}; public EvaluateParameter: {[key: string]: EvaluateParameterHandler} = {}; public Evaluate(): any { Iif (this.HasErrors()) { throw new EvaluationException('Failed evaluating the expression. Refer to errors.'); } Iif (this.ParsedExpression == null) { this.ParsedExpression = this.Compile( this.OriginalExpression, (this.Options & EvaluateOptions.NoCache) == EvaluateOptions.NoCache ); } const visitor = new EvaluationVisitor(this.Options); visitor.EvaluateFunction = this.EvaluateFunction; visitor.EvaluateParameter = this.EvaluateParameter; visitor.Parameters = this.Parameters; // if array evaluation, execute the same expression multiple times if ((this.Options & EvaluateOptions.IterateParameters) == EvaluateOptions.IterateParameters) { let size = -1; this.ParametersBackup = {}; for (const key in this.Parameters) { this.ParametersBackup[key] = this.Parameters[key]; } this.ParameterEnumerators = {}; for (const parameter in this.Parameters) { const value = this.Parameters[parameter]; if (Array.isArray(value)) { const localsize = value.length; if (size == -1) { size = localsize; } else IEif (localsize != size) { throw new EvaluationException( 'When IterateParameters option is used, IEnumerable parameters must have the same number of items' ); } } } for (const key in this.Parameters) { const parameter = this.Parameters[key]; if (parameter != null) { this.ParameterEnumerators[key] = parameter; } } const results = []; for (let i = 0; i < size; i++) { for (const key in this.ParameterEnumerators) { const enumerator = this.ParameterEnumerators[key]; this.Parameters[key] = enumerator[i]; } this.ParsedExpression.Accept(visitor); results.push(visitor.Result); } return results; } this.ParsedExpression.Accept(visitor); return visitor.Result; } } |