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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
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Security;
using Newtonsoft.Json.Utilities;
using Windows.Data.Json;
namespace Newtonsoft.Json.Converters
{
public class JsonValueConverter : JsonConverter
{
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
WriteJsonValue(writer, (IJsonValue)value);
}
private void WriteJsonValue(JsonWriter writer, IJsonValue value)
{
switch (value.ValueType)
{
case JsonValueType.Array:
{
JsonArray a = value.GetArray();
writer.WriteStartArray();
for (int i = 0; i < a.Count; i++)
{
WriteJsonValue(writer, a[i]);
}
writer.WriteEndArray();
}
break;
case JsonValueType.Boolean:
{
writer.WriteValue(value.GetBoolean());
}
break;
case JsonValueType.Null:
{
writer.WriteNull();
}
break;
case JsonValueType.Number:
{
// JsonValue doesn't support integers
// serialize whole numbers without a decimal point
double d = value.GetNumber();
bool isInteger = (d % 1 == 0);
if (isInteger && d <= long.MaxValue && d >= long.MinValue)
writer.WriteValue(Convert.ToInt64(d));
else
writer.WriteValue(d);
}
break;
case JsonValueType.Object:
{
JsonObject o = value.GetObject();
writer.WriteStartObject();
foreach (KeyValuePair<string, IJsonValue> v in o)
{
writer.WritePropertyName(v.Key);
WriteJsonValue(writer, v.Value);
}
writer.WriteEndObject();
}
break;
case JsonValueType.String:
{
writer.WriteValue(value.GetString());
}
break;
default:
throw new ArgumentOutOfRangeException("ValueType");
}
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
if (reader.TokenType == JsonToken.None)
reader.Read();
IJsonValue value = CreateJsonValue(reader);
if (!objectType.IsAssignableFrom(value.GetType()))
throw JsonSerializationException.Create(reader, "Could not convert '{0}' to '{1}'.".FormatWith(CultureInfo.InvariantCulture, value.GetType(), objectType));
return value;
}
private IJsonValue CreateJsonValue(JsonReader reader)
{
while (reader.TokenType == JsonToken.Comment)
{
if (!reader.Read())
throw JsonSerializationException.Create(reader, "Unexpected end.");
}
switch (reader.TokenType)
{
case JsonToken.StartObject:
{
return CreateJsonObject(reader);
}
case JsonToken.StartArray:
{
JsonArray a = new JsonArray();
while (reader.Read())
{
switch (reader.TokenType)
{
case JsonToken.EndArray:
return a;
default:
IJsonValue value = CreateJsonValue(reader);
a.Add(value);
break;
}
}
}
break;
case JsonToken.Integer:
case JsonToken.Float:
return JsonValue.CreateNumberValue(Convert.ToDouble(reader.Value));
case JsonToken.String:
return JsonValue.CreateStringValue(reader.Value.ToString());
case JsonToken.Boolean:
return JsonValue.CreateBooleanValue(Convert.ToBoolean(reader.Value));
case JsonToken.Null:
// surely there is a better way to create a null value than this?
return JsonValue.Parse("null");
case JsonToken.Date:
return JsonValue.CreateStringValue(reader.Value.ToString());
case JsonToken.Bytes:
return JsonValue.CreateStringValue(reader.Value.ToString());
default:
throw JsonSerializationException.Create(reader, "Unexpected or unsupported token: {0}".FormatWith(CultureInfo.InvariantCulture, reader.TokenType));
}
throw JsonSerializationException.Create(reader, "Unexpected end.");
}
private JsonObject CreateJsonObject(JsonReader reader)
{
JsonObject o = new JsonObject();
string propertyName = null;
while (reader.Read())
{
switch (reader.TokenType)
{
case JsonToken.PropertyName:
propertyName = (string)reader.Value;
break;
case JsonToken.EndObject:
return o;
case JsonToken.Comment:
break;
default:
IJsonValue propertyValue = CreateJsonValue(reader);
o.Add(propertyName, propertyValue);
break;
}
}
throw JsonSerializationException.Create(reader, "Unexpected end.");
}
public override bool CanConvert(Type objectType)
{
return typeof(IJsonValue).IsAssignableFrom(objectType);
}
}
}
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