[12074] | 1 | /* Copyright (C) 2011 Jan Källman
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| 2 | *
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| 3 | * This library is free software; you can redistribute it and/or
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| 4 | * modify it under the terms of the GNU Lesser General Public
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| 5 | * License as published by the Free Software Foundation; either
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| 6 | * version 2.1 of the License, or (at your option) any later version.
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| 7 |
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| 8 | * This library is distributed in the hope that it will be useful,
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| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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| 11 | * See the GNU Lesser General Public License for more details.
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| 12 | *
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| 13 | * The GNU Lesser General Public License can be viewed at http://www.opensource.org/licenses/lgpl-license.php
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| 14 | * 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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| 15 | *
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| 16 | * All code and executables are provided "as is" with no warranty either express or implied.
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| 17 | * The author accepts no liability for any damage or loss of business that this product may cause.
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| 18 | *
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| 19 | * Code change notes:
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| 20 | *
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| 21 | * Author Change Date
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| 22 | *******************************************************************************
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| 23 | * Mats Alm Added 2013-12-03
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| 24 | *******************************************************************************/
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| 25 | using System;
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| 26 | using System.Collections.Generic;
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| 27 | using System.Globalization;
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| 28 | using System.Linq;
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| 29 | using System.Text;
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| 30 | using OfficeOpenXml.FormulaParsing.ExpressionGraph;
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| 31 | using OfficeOpenXml.Utils;
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| 32 |
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| 33 | namespace OfficeOpenXml.FormulaParsing.Excel.Functions.Math
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| 34 | {
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| 35 | public class Average : HiddenValuesHandlingFunction
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| 36 | {
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| 37 | public override CompileResult Execute(IEnumerable<FunctionArgument> arguments, ParsingContext context)
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| 38 | {
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| 39 | ValidateArguments(arguments, 1, eErrorType.Div0);
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| 40 | double nValues = 0d, result = 0d;
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| 41 | foreach (var arg in arguments)
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| 42 | {
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| 43 | Calculate(arg, context, ref result, ref nValues);
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| 44 | }
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| 45 | return CreateResult(Divide(result, nValues), DataType.Decimal);
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| 46 | }
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| 47 |
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| 48 | private void Calculate(FunctionArgument arg, ParsingContext context, ref double retVal, ref double nValues, bool isInArray = false)
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| 49 | {
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| 50 | if (ShouldIgnore(arg))
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| 51 | {
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| 52 | return;
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| 53 | }
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| 54 | if (arg.Value is IEnumerable<FunctionArgument>)
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| 55 | {
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| 56 | foreach (var item in (IEnumerable<FunctionArgument>)arg.Value)
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| 57 | {
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| 58 | Calculate(item, context, ref retVal, ref nValues, true);
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| 59 | }
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| 60 | }
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| 61 | else if (arg.IsExcelRange)
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| 62 | {
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| 63 | foreach (var c in arg.ValueAsRangeInfo)
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| 64 | {
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| 65 | if (ShouldIgnore(c, context)) continue;
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| 66 | CheckForAndHandleExcelError(c);
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| 67 | if (!IsNumeric(c.Value)) continue;
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| 68 | nValues++;
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| 69 | retVal += c.ValueDouble;
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| 70 | }
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| 71 | }
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| 72 | else
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| 73 | {
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| 74 | var numericValue = GetNumericValue(arg.Value, isInArray);
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| 75 | if (numericValue.HasValue)
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| 76 | {
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| 77 | nValues++;
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| 78 | retVal += numericValue.Value;
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| 79 | }
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| 80 | else if ((arg.Value is string) && !ConvertUtil.IsNumericString(arg.Value))
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| 81 | {
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| 82 | if (!isInArray)
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| 83 | {
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| 84 | ThrowExcelErrorValueException(eErrorType.Value);
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| 85 | }
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| 86 | }
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| 87 | }
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| 88 | CheckForAndHandleExcelError(arg);
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| 89 | }
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| 90 |
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| 91 | private double? GetNumericValue(object obj, bool isInArray)
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| 92 | {
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| 93 | if (IsNumeric(obj))
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| 94 | {
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| 95 | return ConvertUtil.GetValueDouble(obj);
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| 96 | }
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| 97 | else if ((obj is bool) && !isInArray)
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| 98 | {
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| 99 | return ConvertUtil.GetValueDouble(obj);
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| 100 | }
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| 101 | else if (ConvertUtil.IsNumericString(obj))
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| 102 | {
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| 103 | return double.Parse(obj.ToString(), CultureInfo.InvariantCulture);
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| 104 | }
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| 105 | return default(double?);
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| 106 | }
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| 107 | }
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| 108 | }
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