[12074] | 1 | /*******************************************************************************
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| 2 | * You may amend and distribute as you like, but don't remove this header!
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| 3 | *
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| 4 | * EPPlus provides server-side generation of Excel 2007/2010 spreadsheets.
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| 5 | * See http://www.codeplex.com/EPPlus for details.
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| 6 | *
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| 7 | * Copyright (C) 2011 Jan Källman
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| 8 | *
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| 9 | * This library is free software; you can redistribute it and/or
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| 10 | * modify it under the terms of the GNU Lesser General Public
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| 11 | * License as published by the Free Software Foundation; either
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| 12 | * version 2.1 of the License, or (at your option) any later version.
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| 13 |
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| 14 | * This library is distributed in the hope that it will be useful,
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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| 17 | * See the GNU Lesser General Public License for more details.
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| 18 | *
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| 19 | * The GNU Lesser General Public License can be viewed at http://www.opensource.org/licenses/lgpl-license.php
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| 20 | * If you unfamiliar with this license or have questions about it, here is an http://www.gnu.org/licenses/gpl-faq.html
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| 21 | *
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| 22 | * All code and executables are provided "as is" with no warranty either express or implied.
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| 23 | * The author accepts no liability for any damage or loss of business that this product may cause.
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| 24 | *
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| 25 | * Code change notes:
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| 26 | *
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| 27 | * Author Change Date
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| 28 | * ******************************************************************************
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| 29 | * Mats Alm Added 2013-03-01 (Prior file history on https://github.com/swmal/ExcelFormulaParser)
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| 30 | *******************************************************************************/
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| 31 | using System;
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| 32 | using System.Collections.Generic;
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| 33 | using System.Globalization;
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| 34 | using System.Linq;
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| 35 | using System.Text;
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| 36 | using OfficeOpenXml.FormulaParsing.Excel;
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| 37 | using OfficeOpenXml.FormulaParsing.Excel.Functions;
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| 38 | using OfficeOpenXml.FormulaParsing.Exceptions;
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| 39 | using OfficeOpenXml.FormulaParsing.ExpressionGraph.FunctionCompilers;
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| 40 | using OfficeOpenXml.Utils;
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| 41 |
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| 42 | namespace OfficeOpenXml.FormulaParsing.ExpressionGraph
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| 43 | {
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| 44 | /// <summary>
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| 45 | /// Expression that handles execution of a function.
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| 46 | /// </summary>
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| 47 | public class FunctionExpression : AtomicExpression
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| 48 | {
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| 49 | /// <summary>
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| 50 | /// Constructor
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| 51 | /// </summary>
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| 52 | /// <param name="expression">should be the of the function</param>
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| 53 | /// <param name="parsingContext"></param>
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| 54 | /// <param name="isNegated">True if the numeric result of the function should be negated.</param>
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| 55 | public FunctionExpression(string expression, ParsingContext parsingContext, bool isNegated)
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| 56 | : base(expression)
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| 57 | {
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| 58 | _parsingContext = parsingContext;
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| 59 | _functionCompilerFactory = new FunctionCompilerFactory(parsingContext.Configuration.FunctionRepository);
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| 60 | _isNegated = isNegated;
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| 61 | base.AddChild(new FunctionArgumentExpression(this));
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| 62 | }
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| 63 |
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| 64 | private readonly ParsingContext _parsingContext;
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| 65 | private readonly FunctionCompilerFactory _functionCompilerFactory;
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| 66 | private readonly bool _isNegated;
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| 67 |
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| 68 |
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| 69 | public override CompileResult Compile()
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| 70 | {
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| 71 | try
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| 72 | {
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| 73 | var function = _parsingContext.Configuration.FunctionRepository.GetFunction(ExpressionString);
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| 74 | if (function == null)
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| 75 | {
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| 76 | if (_parsingContext.Debug)
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| 77 | {
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| 78 | _parsingContext.Configuration.Logger.Log(_parsingContext, string.Format("'{0}' is not a supported function", ExpressionString));
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| 79 | }
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| 80 | return new CompileResult(ExcelErrorValue.Create(eErrorType.Name), DataType.ExcelError);
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| 81 | }
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| 82 | if (_parsingContext.Debug)
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| 83 | {
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| 84 | _parsingContext.Configuration.Logger.LogFunction(ExpressionString);
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| 85 | }
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| 86 | var compiler = _functionCompilerFactory.Create(function);
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| 87 | var result = compiler.Compile(HasChildren ? Children : Enumerable.Empty<Expression>(), _parsingContext);
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| 88 | if (_isNegated)
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| 89 | {
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| 90 | if (!result.IsNumeric)
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| 91 | {
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| 92 | if (_parsingContext.Debug)
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| 93 | {
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| 94 | var msg = string.Format("Trying to negate a non-numeric value ({0}) in function '{1}'",
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| 95 | result.Result, ExpressionString);
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| 96 | _parsingContext.Configuration.Logger.Log(_parsingContext, msg);
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| 97 | }
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| 98 | return new CompileResult(ExcelErrorValue.Create(eErrorType.Value), DataType.ExcelError);
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| 99 | }
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| 100 | return new CompileResult(result.ResultNumeric * -1, result.DataType);
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| 101 | }
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| 102 | return result;
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| 103 | }
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| 104 | catch (ExcelErrorValueException e)
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| 105 | {
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| 106 | if (_parsingContext.Debug)
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| 107 | {
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| 108 | _parsingContext.Configuration.Logger.Log(_parsingContext, e);
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| 109 | }
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| 110 | return new CompileResult(e.ErrorValue, DataType.ExcelError);
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| 111 | }
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| 112 |
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| 113 | }
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| 114 |
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| 115 | public override Expression PrepareForNextChild()
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| 116 | {
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| 117 | return base.AddChild(new FunctionArgumentExpression(this));
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| 118 | }
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| 119 |
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| 120 | public override bool HasChildren
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| 121 | {
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| 122 | get
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| 123 | {
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| 124 | return (Children.Any() && Children.First().Children.Any());
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| 125 | }
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| 126 | }
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| 127 |
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| 128 | public override Expression AddChild(Expression child)
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| 129 | {
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| 130 | Children.Last().AddChild(child);
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| 131 | return child;
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| 132 | }
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| 133 | }
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| 134 | }
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