public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
var token = reader.TokenType;
switch (token)
{
case JsonToken.String:
{
AdaptiveFallbackElement adaptiveFallbackElement = new AdaptiveFallbackElement();
string stringValue = (string)reader.Value;
if (stringValue == "drop")
{
adaptiveFallbackElement.Type = AdaptiveFallbackElement.AdaptiveFallbackType.Drop;
}
else
{
throw new AdaptiveSerializationException("The only valid string value for the fallback property is 'drop'.");
}
return(adaptiveFallbackElement);
}
case JsonToken.StartObject:
{
var jObject = JObject.Load(reader);
var typeName = AdaptiveTypedElementConverter.GetElementTypeName(objectType, jObject);
Type type;
if (!AdaptiveTypedElementConverter.TypedElementTypes.Value.TryGetValue(typeName, out type))
{
type = typeof(AdaptiveUnknownElement);
}
IsInFallback = true;
string objectId = jObject.Value <string>("id");
AdaptiveInternalID internalID = AdaptiveInternalID.Next();
// Handle deserializing unknown element
ParseContext.PushElement(objectId, internalID);
var result = (AdaptiveTypedElement)Activator.CreateInstance(type);
serializer.Populate(jObject.CreateReader(), result);
ParseContext.PopElement();
IsInFallback = false;
AdaptiveFallbackElement adaptiveFallbackElement = new AdaptiveFallbackElement();
adaptiveFallbackElement.Type = AdaptiveFallbackElement.AdaptiveFallbackType.Content;
adaptiveFallbackElement.Content = result;
return(adaptiveFallbackElement);
}
default:
{
throw new AdaptiveSerializationException("Invalid value for fallback");
}
}
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
var jObject = JObject.Load(reader);
string typeName = GetElementTypeName(objectType, jObject);
if (TypedElementTypes.Value.TryGetValue(typeName, out var type))
{
string objectId = jObject.Value <string>("id");
if (objectId == null)
{
if (typeof(AdaptiveInput).GetTypeInfo().IsAssignableFrom(type.GetTypeInfo()))
{
throw new AdaptiveSerializationException($"Required property 'id' not found on '{typeName}'");
}
}
// add id of element to ParseContext
AdaptiveInternalID internalID = AdaptiveInternalID.Current();
if (type != typeof(AdaptiveCard))
{
internalID = AdaptiveInternalID.Next();
ParseContext.PushElement(objectId, internalID);
}
var result = (AdaptiveTypedElement)Activator.CreateInstance(type);
try
{
serializer.Populate(jObject.CreateReader(), result);
}
catch (JsonSerializationException) { }
// remove id of element from ParseContext
if (type != typeof(AdaptiveCard))
{
ParseContext.PopElement();
}
HandleAdditionalProperties(result);
return(result);
}
else // We're looking at an unknown element
{
string objectId = jObject.Value <string>("id");
AdaptiveInternalID internalID = AdaptiveInternalID.Next();
// Handle deserializing unknown element
ParseContext.PushElement(objectId, internalID);
AdaptiveTypedElement result = null;
if (ParseContext.Type == ParseContext.ContextType.Element)
{
result = (AdaptiveTypedElement)Activator.CreateInstance(typeof(AdaptiveUnknownElement));
serializer.Populate(jObject.CreateReader(), result);
}
else // ParseContext.Type == ParseContext.ContextType.Action
{
result = (AdaptiveTypedElement)Activator.CreateInstance(typeof(AdaptiveUnknownAction));
serializer.Populate(jObject.CreateReader(), result);
}
ParseContext.PopElement();
Warnings.Add(new AdaptiveWarning(-1, $"Unknown element '{typeName}'"));
return(result);
}
}