EPPlus/FormulaParsing/ExpressionGraph/ExpressionFactory.cs

/*******************************************************************************
 * You may amend and distribute as you like, but don't remove this header!
 *
 * EPPlus provides server-side generation of Excel 2007/2010 spreadsheets.
 * See http://www.codeplex.com/EPPlus for details.
 *
 * Copyright (C) 2011  Jan Källman
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.

 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * The GNU Lesser General Public License can be viewed at http://www.opensource.org/licenses/lgpl-license.php
 * If you unfamiliar with this license or have questions about it, here is an http://www.gnu.org/licenses/gpl-faq.html
 *
 * All code and executables are provided "as is" with no warranty either express or implied.
 * The author accepts no liability for any damage or loss of business that this product may cause.
 *
 * Code change notes:
 *
 * Author							Change						Date
 * ******************************************************************************
 * Mats Alm   		                Added       		        2013-03-01 (Prior file history on https://github.com/swmal/ExcelFormulaParser)
 *******************************************************************************/

using OfficeOpenXml.FormulaParsing.LexicalAnalysis;

namespace OfficeOpenXml.FormulaParsing.ExpressionGraph;

public class ExpressionFactory : IExpressionFactory {
  private readonly ExcelDataProvider _excelDataProvider;
  private readonly ParsingContext _parsingContext;

  public ExpressionFactory(ExcelDataProvider excelDataProvider, ParsingContext context) {
    _excelDataProvider = excelDataProvider;
    _parsingContext = context;
  }

  public Expression Create(Token token) {
    switch (token.TokenType) {
      case TokenType.Integer:
        return new IntegerExpression(token.Value, token.IsNegated);
      case TokenType.String:
        return new StringExpression(token.Value);
      case TokenType.Decimal:
        return new DecimalExpression(token.Value, token.IsNegated);
      case TokenType.Boolean:
        return new BooleanExpression(token.Value);
      case TokenType.ExcelAddress:
        return new ExcelAddressExpression(
            token.Value,
            _excelDataProvider,
            _parsingContext,
            token.IsNegated);
      case TokenType.InvalidReference:
        return new ExcelErrorExpression(token.Value, ExcelErrorValue.Create(eErrorType.Ref));
      case TokenType.NumericError:
        return new ExcelErrorExpression(token.Value, ExcelErrorValue.Create(eErrorType.Num));
      case TokenType.ValueDataTypeError:
        return new ExcelErrorExpression(token.Value, ExcelErrorValue.Create(eErrorType.Value));
      case TokenType.Null:
        return new ExcelErrorExpression(token.Value, ExcelErrorValue.Create(eErrorType.Null));
      case TokenType.NameValue:
        return new NamedValueExpression(token.Value, _parsingContext);
      default:
        return new StringExpression(token.Value);
    }
  }
}