/// <summary>
/// Serializes an object into a JSON string based on discriminator
/// field and object name. If JsonObject attribute is available, its value is used instead.
/// </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");
}
string typeName = value.GetType().Name;
if (value.GetType().GetTypeInfo().GetCustomAttributes <JsonObjectAttribute>().Any())
{
typeName = value.GetType().GetTypeInfo().GetCustomAttribute <JsonObjectAttribute>().Id;
}
// Add discriminator field
writer.WriteStartObject();
writer.WritePropertyName(Discriminator);
writer.WriteValue(typeName);
JsonConverterHelper.SerializeProperties(writer, value, serializer);
writer.WriteEndObject();
}
/// <summary>
/// Serializes an object into a JSON string based on discriminator
/// field and object name. If JsonObject attribute is available, its value is used instead.
/// </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");
}
string typeName = value.GetType().Name;
// check if the jsonobject attribute was inherited from basetype, if yes, we don't want to use it to serialize the object
var baseTypeAttribute = value.GetType().GetTypeInfo().BaseType.GetTypeInfo().GetCustomAttribute <JsonObjectAttribute>()?.Id;
var derivedTypeAttribute = value.GetType().GetTypeInfo().GetCustomAttribute <JsonObjectAttribute>()?.Id;
if (!string.IsNullOrEmpty(derivedTypeAttribute) && derivedTypeAttribute != baseTypeAttribute)
{
typeName = derivedTypeAttribute;
}
// Add discriminator field
writer.WriteStartObject();
writer.WritePropertyName(Discriminator);
writer.WriteValue(typeName);
JsonConverterHelper.SerializeProperties(writer, value, serializer);
writer.WriteEndObject();
}
