private Type ResolveImplType(Type objectType, JObject givenJObject, JsonSerializer serializer)
{
Type targetType = ResolveImplTypeUsingTypeResolverMethod(objectType, givenJObject, serializer);
if (targetType != null)
{
return(targetType);
}
IEnumerable <Type> knownImplTypes =
System.Attribute.GetCustomAttributes(objectType) // Select all custom attribute
.Where(ca => ca is KnownTypeAttribute) // filter which are KnownTypeAttribute
.Select(kta => (kta as KnownTypeAttribute).Type); // return type of Attribute as type of KnownTypeAttribute
var jsonKeysInJsonString = givenJObject.Select <KeyValuePair <string, JToken>, string>(kv => kv.Key).ToList();
var candidateJsonPropertiesUnion = new JsonPropertyCollection(objectType).Select(p => p.PropertyName);
foreach (var candidateImplType in knownImplTypes)
{
var jsonContract = serializer.ContractResolver.ResolveContract(candidateImplType) as JsonObjectContract;
candidateJsonPropertiesUnion = candidateJsonPropertiesUnion.Union(jsonContract.Properties.Select(p => p.PropertyName));
}
var relevantJsonKeysInJson = jsonKeysInJsonString.Intersect(candidateJsonPropertiesUnion);
foreach (var candidateImplType in knownImplTypes)
{
var jsonContract = serializer.ContractResolver.ResolveContract(candidateImplType) as JsonObjectContract;
var jsonPropsInType = jsonContract.Properties;
var jsonPropNamesInType = jsonPropsInType.Select(p => p.PropertyName);
var missingProperties = relevantJsonKeysInJson.Except(jsonPropNamesInType);
if (missingProperties.FirstOrDefault() == null)
{
return(candidateImplType);
}
}
throw new FabricSerializationException(
string.Format("KnownTypeJsonConverter(): None of the known types: {0} has all the properties contained in given json string. Properties in json string: {1}.",
string.Join(",", knownImplTypes.Select(t => t.Name)), // comma separated names of known types.
string.Join(",", jsonKeysInJsonString))); // comma separated keys in json object
}