#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 !NET20 using System; using System.Collections.Generic; using System.Dynamic; using System.Globalization; using System.Linq; using System.Text; using Newtonsoft.Json.Utilities; namespace Newtonsoft.Json.Converters { /// <summary> /// Converts an <see cref="ExpandoObject"/> to and from JSON. /// </summary> internal class ExpandoObjectConverter : JsonConverter { /// <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) { // can write is set to false } /// <summary> /// Reads the JSON representation of the object. /// </summary> /// <param name="reader">The <see cref="JsonReader"/> to read from.</param> /// <param name="objectType">Type of the object.</param> /// <param name="existingValue">The existing value of object being read.</param> /// <param name="serializer">The calling serializer.</param> /// <returns>The object value.</returns> public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer) { return ReadValue(reader); } private object ReadValue(JsonReader reader) { if (!reader.MoveToContent()) { throw JsonSerializationException.Create(reader, "Unexpected end when reading ExpandoObject."); } switch (reader.TokenType) { case JsonToken.StartObject: return ReadObject(reader); case JsonToken.StartArray: return ReadList(reader); default: if (JsonTokenUtils.IsPrimitiveToken(reader.TokenType)) { return reader.Value; } throw JsonSerializationException.Create(reader, "Unexpected token when converting ExpandoObject: {0}".FormatWith(CultureInfo.InvariantCulture, reader.TokenType)); } } private object ReadList(JsonReader reader) { IList<object> list = new List<object>(); while (reader.Read()) { switch (reader.TokenType) { case JsonToken.Comment: break; default: object v = ReadValue(reader); list.Add(v); break; case JsonToken.EndArray: return list; } } throw JsonSerializationException.Create(reader, "Unexpected end when reading ExpandoObject."); } private object ReadObject(JsonReader reader) { IDictionary<string, object> expandoObject = new ExpandoObject(); while (reader.Read()) { switch (reader.TokenType) { case JsonToken.PropertyName: string propertyName = reader.Value.ToString(); if (!reader.Read()) { throw JsonSerializationException.Create(reader, "Unexpected end when reading ExpandoObject."); } object v = ReadValue(reader); expandoObject[propertyName] = v; break; case JsonToken.Comment: break; case JsonToken.EndObject: return expandoObject; } } throw JsonSerializationException.Create(reader, "Unexpected end when reading ExpandoObject."); } /// <summary> /// Determines whether this instance can convert the specified object type. /// </summary> /// <param name="objectType">Type of the object.</param> /// <returns> /// <c>true</c> if this instance can convert the specified object type; otherwise, <c>false</c>. /// </returns> public override bool CanConvert(Type objectType) { return (objectType == typeof(ExpandoObject)); } /// <summary> /// Gets a value indicating whether this <see cref="JsonConverter"/> can write JSON. /// </summary> /// <value> /// <c>true</c> if this <see cref="JsonConverter"/> can write JSON; otherwise, <c>false</c>. /// </value> public override bool CanWrite { get { return false; } } } } #endif