internal static T Deserialize <T>(JsonRpc jsonRpc, SerializationInfo info, TraceSource?traceSource)
where T : Exception
{
if (!TryGetValue(info, "ClassName", out string?runtimeTypeName) || runtimeTypeName is null)
{
throw new NotSupportedException("ClassName was not found in the serialized data.");
}
TryGetValue(info, AssemblyNameKeyName, out string?runtimeAssemblyName);
Type?runtimeType = jsonRpc.LoadType(runtimeTypeName, runtimeAssemblyName);
if (runtimeType is null)
{
if (traceSource?.Switch.ShouldTrace(TraceEventType.Warning) ?? false)
{
traceSource.TraceEvent(TraceEventType.Warning, (int)JsonRpc.TraceEvents.ExceptionTypeNotFound, "{0} type could not be loaded. Falling back to System.Exception.", runtimeTypeName);
}
// fallback to deserializing the base Exception type.
runtimeType = typeof(Exception);
}
// Sanity/security check: ensure the runtime type derives from the expected type.
if (!typeof(T).IsAssignableFrom(runtimeType))
{
throw new NotSupportedException($"{runtimeTypeName} does not derive from {typeof(T).FullName}.");
}
// Find the nearest exception type that implements the deserializing constructor and is deserializable.
ConstructorInfo?ctor;
while (runtimeType.GetCustomAttribute <SerializableAttribute>() is null || (ctor = FindDeserializingConstructor(runtimeType)) is null)
{
string errorMessage = $"{runtimeType.FullName} does not declare a deserializing constructor with signature ({string.Join(", ", DeserializingConstructorParameterTypes.Select(t => t.FullName))}).";
traceSource?.TraceEvent(TraceEventType.Warning, (int)JsonRpc.TraceEvents.ExceptionNotDeserializable, errorMessage);
runtimeType = runtimeType.BaseType;
if (runtimeType is null)
{
throw new NotSupportedException(errorMessage);
}
}
return((T)ctor.Invoke(new object?[] { info, Context }));
}
