Src/Newtonsoft.Json/Converters/EntityKeyMemberConverter.cs

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#region License
// Copyright (c) 2007 James Newton-King
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#endregion

#if !PocketPC && !SILVERLIGHT && !NET20
using System;
using Newtonsoft.Json.Serialization;
using System.Globalization;
using Newtonsoft.Json.Utilities;

namespace Newtonsoft.Json.Converters
{
  internal interface IEntityKeyMember
  {
    string Key { get; set; }
    object Value { get; set; }
  }

  /// <summary>
  /// Converts an Entity Framework EntityKey to and from JSON.
  /// </summary>
  public class EntityKeyMemberConverter : JsonConverter
  {
    private const string EntityKeyMemberFullTypeName = "System.Data.EntityKeyMember";

    /// <summary>
    /// Writes the JSON representation of the object.
    /// </summary>
    /// <param name="writer">The <see cref="JsonWriter"/> to write to.</param>
    /// <param name="value">The value.</param>
    /// <param name="serializer">The calling serializer.</param>
    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
      IEntityKeyMember entityKeyMember = DynamicWrapper.CreateWrapper<IEntityKeyMember>(value);
      Type keyType = (entityKeyMember.Value != null) ? entityKeyMember.Value.GetType() : null;

      writer.WriteStartObject();
      writer.WritePropertyName("Key");
      writer.WriteValue(entityKeyMember.Key);