EPPlus/FormulaParsing/Excel/Functions/CompileResultValidators.cs

/* 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		                2013-12-26
 *******************************************************************************/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using OfficeOpenXml.FormulaParsing.ExpressionGraph;

namespace OfficeOpenXml.FormulaParsing.Excel.Functions
{
    public class CompileResultValidators
    {
        private readonly Dictionary<DataType, CompileResultValidator> _validators = new Dictionary<DataType, CompileResultValidator>(); 

        private CompileResultValidator CreateOrGet(DataType dataType)
        {
            if (_validators.ContainsKey(dataType))
            {
                return _validators[dataType];
            }
            if (dataType == DataType.Decimal)
            {
                return _validators[DataType.Decimal] = new DecimalCompileResultValidator();
            }
            return CompileResultValidator.Empty;
        }

        public CompileResultValidator GetValidator(DataType dataType)
        {
            return CreateOrGet(dataType);
        }
    }
}