public object FromJson(
JsonValue json,
Type deserializationType,
DeserializationContext context
)
{
// NOTE: deserialization shouldn't fail no matter what the JSON is.
// Instead a SerializedException instance should be returned.
// The only exception is improper usage of this method.
if (!typeof(Exception).IsAssignableFrom(deserializationType))
{
throw new ArgumentException(
"Provided type is not an exception."
);
}
if (json.IsNull)
{
return(null);
}
try
{
if (json.IsString)
{
return(LegacyFromJson(json));
}
}
catch (Exception e)
{
// RETURN, not throw!
return(new SerializedException(json, e));
}
JsonObject obj = json.AsJsonObject;
if (obj == null)
{
return(null);
}
try
{
// deserialize the thing
Type actualType = FindExceptionType(obj["ClassName"].AsString);
SerializationInfo defaultInfo = GetDefaultSerializationInfo(actualType);
ExtendJsonWithDefaultSerializationInfo(obj, defaultInfo);
var e = SerializableTypeSerializer.FromJson(obj, actualType, context);
PreserveStackTrace((Exception)e);
return(e);
}
catch (Exception e)
{
// RETURN, not throw!
return(new SerializedException(json, e));
}
}
public static object FromJson(
JsonValue json,
Type typeScope,
DeserializationContext context = default(DeserializationContext)
)
{
// === Handle null ===
if (json.IsNull)
{
return(null);
}
// === Parse and validate arguments ===
if (typeScope == null)
{
throw new ArgumentNullException(nameof(typeScope));
}
// context cannot be null, no need to check
// === Guard insecure deserialization ===
if (!context.suppressInsecureDeserializationException)
{
if (typeScope == typeof(object))
{
throw new InsecureDeserializationException(
"You cannot deserialize unknown data to an 'object' " +
"or 'dynamic' variable, as it poses a security risk. " +
"Read the security section of the serialization " +
"documentation to learn more."
);
}
}
// === Determine deserialization type (the "$type" argument) ===
Type deserializationType = GetDeserializationType(json, typeScope);
// === Call static constructor of the deserialized type ===
RuntimeHelpers.RunClassConstructor(deserializationType.TypeHandle);
// === Deserialize ===
// .NET primitives
if (typeScope.IsPrimitive)
{
return(DotNetPrimitivesSerializer.FromJson(json, typeScope));
}
// string
if (typeScope == typeof(string))
{
return(json.AsString);
}
// enums
if (typeScope.IsEnum)
{
return(EnumSerializer.FromJson(json, typeScope));
}
// arrays
if (typeScope.IsArray)
{
// binary data
if (typeScope == typeof(byte[]))
{
return(BinarySerializer.FromJson(json, typeScope, context));
}
return(ArraySerializer.FromJson(json, typeScope, context));
}
// by what type value to search through ITypeSerializers
var searchType = typeScope.IsGenericType
? typeScope.GetGenericTypeDefinition()
: typeScope;
// exact type serializers
if (exactTypeSerializers.TryGetValue(searchType, out ITypeSerializer serializer))
{
return(serializer.FromJson(json, deserializationType, context));
}
// assignable type serializers
foreach (var pair in assignableTypeSerializers)
{
if (pair.Key.IsAssignableFrom(searchType))
{
return(pair.Value.FromJson(json, deserializationType, context));
}
}
// unisave serializable
if (typeof(IUnisaveSerializable).IsAssignableFrom(deserializationType))
{
return(UnisaveSerializableTypeSerializer.FromJson(
json, deserializationType, context
));
}
// serializable
if (typeof(ISerializable).IsAssignableFrom(deserializationType))
{
return(SerializableTypeSerializer.FromJson(
json, deserializationType, context
));
}
// other
return(DefaultSerializer.FromJson(
json,
deserializationType,
context
));
}