/// <summary>
/// Serializes an object into a JSON string adding Properties.
/// </summary>
/// <param name="writer">The JSON writer.</param>
/// <param name="value">The value to serialize.</param>
/// <param name="serializer">The JSON serializer.</param>
public override void WriteJson(JsonWriter writer,
object value, JsonSerializer serializer)
{
if (writer == null)
{
throw new ArgumentNullException("writer");
}
if (value == null)
{
throw new ArgumentNullException("value");
}
if (serializer == null)
{
throw new ArgumentNullException("serializer");
}
// If generic resource - serialize as-is
if (value.GetType().GetTypeInfo().DeclaredProperties.Any(p => p.Name == "Properties" && p.PropertyType == typeof(object)))
{
GetSerializerWithoutCurrentConverter(serializer).Serialize(writer, value);
return;
}
// Add discriminator field
writer.WriteStartObject();
// If there is polymorphism - add polymorphic property
var polymorphicSerializer = serializer.Converters
.FirstOrDefault(c =>
c.GetType().GetTypeInfo().IsGenericType&&
c.GetType().GetGenericTypeDefinition() == typeof(PolymorphicSerializeJsonConverter <>) &&
c.CanConvert(value.GetType())) as PolymorphicJsonConverter;
if (polymorphicSerializer != null)
{
writer.WritePropertyName(polymorphicSerializer.Discriminator);
string typeName = value.GetType().Name;
if (value.GetType().GetTypeInfo().GetCustomAttributes <JsonObjectAttribute>().Any())
{
typeName = value.GetType().GetTypeInfo().GetCustomAttribute <JsonObjectAttribute>().Id;
}
writer.WriteValue(typeName);
}
// Go over each property that is in resource and write to stream
JsonConverterHelper.SerializeProperties(writer, value, serializer,
p => !p.PropertyName.StartsWith("properties.", StringComparison.OrdinalIgnoreCase));
// If there is a need to add properties element - add it
var contract = (JsonObjectContract)serializer.ContractResolver.ResolveContract(value.GetType());
if (contract.Properties.Any(p =>
p.PropertyName.StartsWith("properties.", StringComparison.OrdinalIgnoreCase) &&
(p.ValueProvider.GetValue(value) != null ||
serializer.NullValueHandling == NullValueHandling.Include)))
{
writer.WritePropertyName(PropertiesNode);
writer.WriteStartObject();
JsonConverterHelper.SerializeProperties(writer, value, serializer,
p => p.PropertyName.StartsWith("properties.", StringComparison.OrdinalIgnoreCase));
writer.WriteEndObject();
}
writer.WriteEndObject();
}
