/
IFilterDescriptorConverter.cs
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/
IFilterDescriptorConverter.cs
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using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Text;
using Telerik.DataSource;
namespace CustomSerializer.Server.JsonConverters
{
/// <summary>
/// Handles serialization and deserialization of the Telerik DataSourceRequest filter descriptors for Newtonsoft.Json
/// </summary>
public class FilterDescriptorJsonConverter : JsonConverter
{
public override bool CanConvert(Type objectType)
{
return objectType == typeof(IFilterDescriptor);
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
JObject filterDescriptor = JObject.Load(reader);
if (filterDescriptor.ContainsKey("logicalOperator"))
{
return filterDescriptor.ToObject<CompositeFilterDescriptor>(serializer);
}
else
{
return filterDescriptor.ToObject<FilterDescriptor>(serializer);
}
}
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
if (value is CompositeFilterDescriptor)
{
serializer.Serialize(writer, (CompositeFilterDescriptor)value);
}
else if (value is FilterDescriptor)
{
serializer.Serialize(writer, (FilterDescriptor)value);
}
}
}
}