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akkadotnet / Hyperion

Polymorphic serialization for .NET
Apache License 2.0
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Unable to roundtrip objects derived from List<T> #381

Open mookid8000 opened 5 months ago

mookid8000 commented 5 months ago

Version Information Relates to Hyperion 0.12.2

Describe the bug When roundtripping an object derived from a collection type, it seems like the object itself does not get its fields included.

E.g. objects of this type:

public class ObjectDerivedFromGenericList : List<string>
{
    public string Text { get; set; }
}

will always have a null value in the Text property after a roundtrip. I've reproduced the issue with List<string>, ObservableCollection<string>, and ObservableCollection<OneOfMyOwnTypes>.

To Reproduce I managed to reproduce the issue here: https://github.com/mookid8000/Hyperion/blob/feature/nonserialized/src/Hyperion.Tests/Bugs.cs#L494-L513

Expected behavior I expected that the Text property (or, to be more precise: The compiler-generated backing field) to have been roundtripped too.

Actual behavior The Text property was null after the roundtrip.

Environment

.NET SDK:
 Version:           8.0.204
 Commit:            c338c7548c
 Workload version:  8.0.200-manifests.7d36c14f

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.19045
 OS Platform: Windows
 RID:         win-x64
 Base Path:   C:\Program Files\dotnet\sdk\8.0.204\

.NET workloads installed:
There are no installed workloads to display.

Host:
  Version:      8.0.4
  Architecture: x64
  Commit:       2d7eea2529

.NET SDKs installed:
  8.0.204 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.All 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.29 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 7.0.18 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 8.0.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.29 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 7.0.18 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 8.0.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.WindowsDesktop.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.29 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 7.0.18 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 8.0.4 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
  x86   [C:\Program Files (x86)\dotnet]
    registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]

Environment variables:
  Not set

global.json file:
  Not found

Learn more:
  https://aka.ms/dotnet/info

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  https://aka.ms/dotnet/download

Additional context My ultimate goal is for Hyperion to be a drop-in replacement for BinaryFormatter, because it's deprecated and will no longer exist in .NET 9. Also, it's slow and provides few and/or pretty bad options for controlling its behavior.