Line data    Source code

       1             : #region Copyright
       2             : // // -----------------------------------------------------------------------
       3             : // // <copyright company="Chinchilla Software Limited">
       4             : // //   Copyright Chinchilla Software Limited. All rights reserved.
       5             : // // </copyright>
       6             : // // -----------------------------------------------------------------------
       7             : #endregion
       8             : 
       9             : using System;
      10             : using System.ComponentModel;
      11             : using System.Globalization;
      12             : 
      13             : namespace Cqrs.WebApi.Formatters.FormMultipart.Infrastructure.TypeConverters
      14             : {
      15             :         /// <summary>
      16             :         /// Provides a unified way of converting <see cref="string"/> values to other types with support for a textual "undefined" value referring to null.
      17             :         /// </summary>
      18             :         public class FromStringConverterAdapter
      19           1 :         {
      20             :                 private readonly Type _type;
      21             : 
      22             :                 private readonly TypeConverter _typeConverter;
      23             : 
      24             :                 /// <summary>
      25             :                 /// Instantiates a new instance of <see cref="FromStringConverterAdapter"/>.
      26             :                 /// </summary>
      27           1 :                 public FromStringConverterAdapter(Type type, TypeConverter typeConverter)
      28             :                 {
      29             :                         if(type == null)
      30             :                                 throw new ArgumentNullException("type");
      31             :                         if (typeConverter == null)
      32             :                                 throw new ArgumentNullException("typeConverter");
      33             : 
      34             :                         _type = type;
      35             :                         _typeConverter = typeConverter;
      36             :                 }
      37             : 
      38             :                 /// <summary>
      39             :                 /// Converts the given text to an object, using the specified context and culture information.
      40             :                 /// </summary>
      41             :                 /// <param name="culture">A <see cref="CultureInfo"/> that specifies the culture to which to convert.</param>
      42             :                 /// <param name="value">The <see cref="string"/> to convert.</param>
      43             :                 /// <returns>An <see cref="object"/> that represents the converted <paramref name="value"/>.</returns>
      44           1 :                 public object ConvertFromString(string value, CultureInfo culture)
      45             :                 {
      46             :                         var isUndefinedNullable = Nullable.GetUnderlyingType(_type) != null && value == "undefined";
      47             :                         if (isUndefinedNullable)
      48             :                                 return null;
      49             : 
      50             :                         return _typeConverter.ConvertFromString(null, culture, value);
      51             :                 }
      52             :         }
      53             : }