public override object ReadJson(JsonReader reader, Type objectType, object existingValue,
JsonSerializer serializer)
{
if (reader.TokenType == JsonToken.Null)
{
return(null);
}
if (objectType.IsAbstract)
{
var jo = JObject.Load(reader);
Type boType;
if (serializer.TypeNameHandling.HasFlag(TypeNameHandling.Objects) &&
jo.TryGetValue("$type", out var typeToken))
{
boType = BusinessObjectSerializationBinder.BusinessObjectAndCOMTypes.SingleOrDefault(t =>
typeToken.Value <string>().ToUpper().StartsWith(t.FullName.ToUpper()));
}
else if (!jo.ContainsKey("boTyp"))
{
throw new ArgumentException(
"If deserializing into an abstract BusinessObject the key \"boTyp\" has to be set. But it wasn't.");
}
else
{
#pragma warning disable CS0618 // Type or member is obsolete
boType = BoMapper.GetTypeForBoName(jo["boTyp"]
.Value <string>()); // ToDo: catch exception if boTyp is not set and throw exception with descriptive error message
#pragma warning restore CS0618 // Type or member is obsolete
}
if (boType == null)
{
foreach (var assembley in AppDomain.CurrentDomain.GetAssemblies())
{
try
{
boType = assembley.GetTypes().FirstOrDefault(x => string.Equals(x.Name,
jo["boTyp"].Value <string>(), StringComparison.CurrentCultureIgnoreCase));
}
catch (ReflectionTypeLoadException)
{
continue;
}
if (boType != null)
{
break;
}
}
if (boType == null)
{
throw new NotImplementedException(
$"The type '{jo["boTyp"].Value<string>()}' does not exist in the BO4E standard.");
}
}
var deserializationMethod = serializer.GetType() // https://stackoverflow.com/a/5218492/10009545
.GetMethods()
.Where(m => m.Name == nameof(serializer.Deserialize))
.Select(m => new
{
Method = m,
Params = m.GetParameters(),
Args = m.GetGenericArguments()
})
.Where(x => x.Params.Length == 1 &&
x.Args.Length == 1)
.Select(x => x.Method)
.First()
.GetGenericMethodDefinition()
.MakeGenericMethod(boType);
try
{
return(deserializationMethod.Invoke(serializer, new object[] { jo.CreateReader() }));
}
catch (TargetInvocationException tie) when(tie.InnerException != null)
{
throw tie.InnerException; // to hide the reflection to the outside.
}
}
serializer.ContractResolver.ResolveContract(objectType).Converter = null;
return(serializer.Deserialize(JObject.Load(reader).CreateReader(), objectType));
}
