public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
var data = JToken.Load(reader);
var migratedData = DataMigrator.TryMigrate(data, objectType, serializer);
try
{
_MigratedTypes.Value[objectType] = true;
using (var dataReader = migratedData.Item1.CreateReader())
{
if (existingValue != null && serializer.ObjectCreationHandling != ObjectCreationHandling.Replace)
{
serializer.Populate(dataReader, existingValue);
return(existingValue);
}
return(serializer.Deserialize(dataReader, objectType));
}
}
finally
{
_MigratedTypes.Value[objectType] = false;
}
}
public Tuple <JToken, bool> TryMigrate(JToken serializedData, Type unserializedDataType, JsonSerializer serializer)
{
var migratedData = _Inner.TryMigrate(serializedData, unserializedDataType, serializer);
if (!IsVerifying)
{
try
{
// Only verify if a migration took place.
// Otherwise assume the data is ok ( verification is slow )
if (migratedData.Item2)
{
IsVerifying = true;
VerifyMigration(migratedData.Item1, unserializedDataType, serializer);
}
}
finally
{
IsVerifying = false;
}
}
return(migratedData);
}
