| 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 |
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| 37 | namespace OfficeOpenXml.FormulaParsing.ExpressionGraph
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| 38 | {
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| 39 | public class ExpressionConverter : IExpressionConverter
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| 40 | {
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| 41 | public StringExpression ToStringExpression(Expression expression)
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| 42 | {
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| 43 | var result = expression.Compile();
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| 44 | var newExp = new StringExpression(result.Result.ToString());
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| 45 | newExp.Operator = expression.Operator;
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| 46 | return newExp;
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| 47 | }
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| 48 |
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| 49 | public Expression FromCompileResult(CompileResult compileResult)
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| 50 | {
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| 51 | switch (compileResult.DataType)
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| 52 | {
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| 53 | case DataType.Integer:
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| 54 | return compileResult.Result is string
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| 55 | ? new IntegerExpression(compileResult.Result.ToString())
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| 56 | : new IntegerExpression(Convert.ToDouble(compileResult.Result));
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| 57 | case DataType.String:
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| 58 | return new StringExpression(compileResult.Result.ToString());
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| 59 | case DataType.Decimal:
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| 60 | return compileResult.Result is string
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| 61 | ? new DecimalExpression(compileResult.Result.ToString())
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| 62 | : new DecimalExpression(((double) compileResult.Result));
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| 63 | case DataType.Boolean:
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| 64 | return compileResult.Result is string
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| 65 | ? new BooleanExpression(compileResult.Result.ToString())
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| 66 | : new BooleanExpression((bool) compileResult.Result);
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| 67 | //case DataType.Enumerable:
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| 68 | // return
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| 69 | case DataType.ExcelError:
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| 70 | //throw (new OfficeOpenXml.FormulaParsing.Exceptions.ExcelErrorValueException((ExcelErrorValue)compileResult.Result)); //Added JK
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| 71 | return compileResult.Result is string
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| 72 | ? new ExcelErrorExpression(compileResult.Result.ToString(),
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| 73 | ExcelErrorValue.Parse(compileResult.Result.ToString()))
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| 74 | : new ExcelErrorExpression((ExcelErrorValue) compileResult.Result);
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| 75 | case DataType.Empty:
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| 76 | return new IntegerExpression(0); //Added JK
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| 77 |
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| 78 | }
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| 79 | return null;
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| 80 | }
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| 81 |
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| 82 | private static IExpressionConverter _instance;
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| 83 | public static IExpressionConverter Instance
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| 84 | {
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| 85 | get
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| 86 | {
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| 87 | if (_instance == null)
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| 88 | {
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| 89 | _instance = new ExpressionConverter();
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| 90 | }
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| 91 | return _instance;
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| 92 | }
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| 93 | }
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| 94 | }
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| 95 | }
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