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Dynamic Complex Type System for OPC UA Server applications #3818

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b85fcd5
Initial commit of the complex type system overhaul
salihgoncu May 28, 2026
66b21f8
Second iteration - Split the AOT and legacy.
salihgoncu May 28, 2026
b4d325e
Merge branch 'master' into feature/opc-complex-types-overhaul
salihgoncu May 28, 2026
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1 change: 1 addition & 0 deletions Applications/ConsoleReferenceClient/ClientSamples.cs
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using Microsoft.Extensions.Logging;
using Opc.Ua;
using Opc.Ua.Client;
using Opc.Ua.ComplexTypes;
using Opc.Ua.Client.ComplexTypes;

namespace Quickstarts
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1 change: 1 addition & 0 deletions Applications/ConsoleReferenceClient/ConsoleReferenceClient.csproj
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<ProjectReference Include="..\..\Libraries\Opc.Ua.Configuration\Opc.Ua.Configuration.csproj" />
<ProjectReference Include="..\..\Libraries\Opc.Ua.Client\Opc.Ua.Client.csproj" />
<ProjectReference Include="..\..\Libraries\Opc.Ua.Client.ComplexTypes\Opc.Ua.Client.ComplexTypes.csproj" />
<ProjectReference Include="..\..\Libraries\Opc.Ua.ComplexTypes\Opc.Ua.ComplexTypes.csproj" />
</ItemGroup>
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@marcschier marcschier May 29, 2026

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We should pull this in via Opc.Ua.Client.csproj, not seperate.

<ItemGroup>
<None Update="Quickstarts.ReferenceClient.Config.xml">
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1 change: 1 addition & 0 deletions Applications/ConsoleReferenceClient/Program.cs
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using Microsoft.Extensions.Logging;
using Opc.Ua;
using Opc.Ua.Client;
using Opc.Ua.ComplexTypes;
using Opc.Ua.Client.ComplexTypes;
using Opc.Ua.Configuration;
using Opc.Ua.Security.Certificates;
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1 change: 1 addition & 0 deletions ....Client/ComplexTypes/ComplexTypeSystem.cs → ....Client.ComplexTypes/ComplexTypeSystem.cs
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using System.Threading.Tasks;
using System.Xml;
using Microsoft.Extensions.Logging;
using Opc.Ua.ComplexTypes;

namespace Opc.Ua.Client.ComplexTypes
{
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1 change: 1 addition & 0 deletions Libraries/Opc.Ua.Client.ComplexTypes/ComplexTypeSystemFactory.cs
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* ======================================================================*/

using System;
using Opc.Ua.ComplexTypes;

namespace Opc.Ua.Client.ComplexTypes
{
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2 changes: 2 additions & 0 deletions Libraries/Opc.Ua.Client.ComplexTypes/ComplexTypesExtensions.cs
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* http://opcfoundation.org/License/MIT/1.00/
* ======================================================================*/

using Opc.Ua.ComplexTypes;

namespace Opc.Ua.Client.ComplexTypes
{
/// <summary>
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1 change: 1 addition & 0 deletions ....Client/ComplexTypes/NodeCacheResolver.cs → ....Client.ComplexTypes/NodeCacheResolver.cs
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@marcschier marcschier May 28, 2026

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Please move those 3 files you moved here back to Opc.Ua.Client. The reason there is Opc.Ua.Client.ComplexTypes is strictly for back compat with 1.5 and to segregate the legacy reflection based type builders. These old reflection emit type builders should not pollute the 1.6 native AOT paths. This also extends to the pieces you moved to Opc.Ua.ComplexTypes, move the reflection.emit bits back to this project too (Opc.Ua.Client.ComplexTypes).

OR - if you absolutely need the reflection emit path on the server side, create a Opc.Ua.ComplexTypes.Reflection package that essentially replaces Opc.Ua.Client.ComplexTypes (today). We can then add a metadata nuget in nuget.spec to wrap it so it keeps its name.

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using System.Threading;
using System.Threading.Tasks;
using Microsoft.Extensions.Logging;
using Opc.Ua.ComplexTypes;

namespace Opc.Ua.Client.ComplexTypes
{
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2 changes: 2 additions & 0 deletions Libraries/Opc.Ua.Client.ComplexTypes/Opc.Ua.Client.ComplexTypes.csproj
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</PropertyGroup>
<ItemGroup>
<InternalsVisibleTo Include="Opc.Ua.Client.ComplexTypes.Tests" />
<InternalsVisibleTo Include="Opc.Ua.Client.Tests" />
</ItemGroup>
<PropertyGroup Condition="'$(Configuration)' == 'Debug'">
<PackageId>$(PackageId).Debug</PackageId>
</PropertyGroup>
<ItemGroup>
<ProjectReference Include="..\..\Stack\Opc.Ua.Core\Opc.Ua.Core.csproj" />
<ProjectReference Include="..\Opc.Ua.Client\Opc.Ua.Client.csproj" />
<ProjectReference Include="..\Opc.Ua.ComplexTypes\Opc.Ua.ComplexTypes.csproj" />
</ItemGroup>
<Target Name="GetPackagingOutputs" />
</Project>
0 ...ries/Opc.Ua.Client/ComplexTypes/readme.md → ...ries/Opc.Ua.Client.ComplexTypes/readme.md
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2 changes: 1 addition & 1 deletion ...omplexTypes/TypeBuilder/AssemblyModule.cs → ...a.ComplexTypes/Builders/AssemblyModule.cs
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using System.Reflection;
using System.Reflection.Emit;

namespace Opc.Ua.Client.ComplexTypes
namespace Opc.Ua.ComplexTypes
{
/// <summary>
/// Use a single assembly and module builder instance to build the type system.
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2 changes: 1 addition & 1 deletion ...xTypes/TypeBuilder/AttributeExtensions.cs → ...plexTypes/Builders/AttributeExtensions.cs
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using System.Reflection.Emit;
using System.Runtime.Serialization;

namespace Opc.Ua.Client.ComplexTypes
namespace Opc.Ua.ComplexTypes
{
/// <summary>
/// Extensions to build attributes for the complex type builder.
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2 changes: 1 addition & 1 deletion ...exTypes/TypeBuilder/ComplexTypeBuilder.cs → ...mplexTypes/Builders/ComplexTypeBuilder.cs
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using System.Reflection;
using System.Reflection.Emit;

namespace Opc.Ua.Client.ComplexTypes
namespace Opc.Ua.ComplexTypes
{
/// <summary>
/// Build an assembly with custom enum types and
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2 changes: 1 addition & 1 deletion ...exTypes/TypeBuilder/ComplexTypeFactory.cs → ...pes/Builders/ComplexTypeBuilderFactory.cs
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using System.Linq;
using System.Xml;

namespace Opc.Ua.Client.ComplexTypes
namespace Opc.Ua.ComplexTypes
{
/// <summary>
/// Factory function for the default complex type builder
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2 changes: 1 addition & 1 deletion ...es/TypeBuilder/ComplexTypeFieldBuilder.cs → ...Types/Builders/ComplexTypeFieldBuilder.cs
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using System.Reflection.Emit;
using System.Xml;

namespace Opc.Ua.Client.ComplexTypes
namespace Opc.Ua.ComplexTypes
{
/// <summary>
/// Builder for property fields.
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2 changes: 1 addition & 1 deletion ...ComplexTypes/DefaultComplexTypeBuilder.cs → ...pes/Builders/DefaultComplexTypeBuilder.cs
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using System.Xml;

namespace Opc.Ua.Client.ComplexTypes
namespace Opc.Ua.ComplexTypes
{
/// <summary>
/// Default complex type builder
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2 changes: 1 addition & 1 deletion ...ComplexTypes/DefaultComplexTypeFactory.cs → ...pes/Builders/DefaultComplexTypeFactory.cs
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using System.Collections.Generic;
using System.Xml;

namespace Opc.Ua.Client.ComplexTypes
namespace Opc.Ua.ComplexTypes
{
/// <summary>
/// Default complex type factory
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2 changes: 1 addition & 1 deletion ...exTypes/DefaultComplexTypeFieldBuilder.cs → ...uilders/DefaultComplexTypeFieldBuilder.cs
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using System.Collections.Generic;
using System.Xml;

namespace Opc.Ua.Client.ComplexTypes
namespace Opc.Ua.ComplexTypes
{
/// <summary>
/// Complex type field builder
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2 changes: 1 addition & 1 deletion ...lient/ComplexTypes/IComplexTypeFactory.cs → ...plexTypes/Builders/IComplexTypeFactory.cs
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using System.Collections.Generic;

namespace Opc.Ua.Client.ComplexTypes
namespace Opc.Ua.ComplexTypes
{
/// <summary>
/// Factory class for the complex type builder.
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2 changes: 1 addition & 1 deletion ...ient/ComplexTypes/IComplexTypeResolver.cs → ...lexTypes/Builders/IComplexTypeResolver.cs
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using System.Threading;
using System.Threading.Tasks;

namespace Opc.Ua.Client.ComplexTypes
namespace Opc.Ua.ComplexTypes
{
/// <summary>
/// Interface for the complex type builder.
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2 changes: 1 addition & 1 deletion ....Client/ComplexTypes/DataTypeException.cs → ...plexTypes/Exceptions/DataTypeException.cs
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using System;

namespace Opc.Ua.Client.ComplexTypes
namespace Opc.Ua.ComplexTypes
{
/// <summary>
/// Exception is thrown if the data type is not found.
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27 changes: 27 additions & 0 deletions Libraries/Opc.Ua.ComplexTypes/Opc.Ua.ComplexTypes.csproj
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@marcschier marcschier May 28, 2026

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Once you moved the reflection emit code back out, link this package from Opc.Ua.Server and Opc.Ua.Client, so comes "for free" when bringing either one in.

Also - I would suggest a new Opc.Ua.ComplexTypes.Tests project that covers the code in this new project in particular (but not by pulling in Opc.Ua.Client, or server, just the remaining code.

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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<AssemblyName>$(AssemblyPrefix).ComplexTypes</AssemblyName>
<TargetFrameworks>$(LibxTargetFrameworks)</TargetFrameworks>
<PackageId>$(PackagePrefix).Opc.Ua.ComplexTypes</PackageId>
<RootNamespace>Opc.Ua.ComplexTypes</RootNamespace>
<Description>OPC UA Complex Types Common Class Library</Description>
<IsPackable>true</IsPackable>
<GenerateDocumentationFile>true</GenerateDocumentationFile>
<IsAotCompatible Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net10.0'))">true</IsAotCompatible>
<Nullable>enable</Nullable>
</PropertyGroup>
<ItemGroup>
<InternalsVisibleTo Include="Opc.Ua.Client" />
<InternalsVisibleTo Include="Opc.Ua.Client.ComplexTypes" />
<InternalsVisibleTo Include="Opc.Ua.Server.ComplexTypes" />
<InternalsVisibleTo Include="Opc.Ua.Client.ComplexTypes.Tests" />
<InternalsVisibleTo Include="Opc.Ua.Client.Tests" />
</ItemGroup>
<PropertyGroup Condition="'$(Configuration)' == 'Debug'">
<PackageId>$(PackageId).Debug</PackageId>
</PropertyGroup>
<ItemGroup>
<ProjectReference Include="..\..\Stack\Opc.Ua.Core\Opc.Ua.Core.csproj" />
</ItemGroup>
<Target Name="GetPackagingOutputs" />
</Project>
32 changes: 32 additions & 0 deletions Libraries/Opc.Ua.ComplexTypes/Properties/AssemblyInfo.cs
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/* ========================================================================
* Copyright (c) 2005-2025 The OPC Foundation, Inc. All rights reserved.
*
* OPC Foundation MIT License 1.00
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* The complete license agreement can be found here:
* http://opcfoundation.org/License/MIT/1.00/
* ======================================================================*/

using System;

[assembly: CLSCompliant(false)]
2 changes: 1 addition & 1 deletion ....Ua.Client/ComplexTypes/DataDictionary.cs → ....Ua.ComplexTypes/Schema/DataDictionary.cs
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using Microsoft.Extensions.Logging;
using Opc.Ua.Schema;

namespace Opc.Ua.Client.ComplexTypes
namespace Opc.Ua.ComplexTypes
{
/// <summary>
/// A class that holds the configuration for a UA service.
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2 changes: 1 addition & 1 deletion ...mplexTypes/DataTypeDefinitionExtension.cs → ...pes/Schema/DataTypeDefinitionExtension.cs
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using System.Linq;
using System.Xml;

namespace Opc.Ua.Client.ComplexTypes
namespace Opc.Ua.ComplexTypes
{
/// <summary>
/// Extensions to convert binary schema type definitions to DataTypeDefinitions.
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2 changes: 1 addition & 1 deletion ...ent.ComplexTypes/Types/BaseComplexType.cs → ....Ua.ComplexTypes/Types/BaseComplexType.cs
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using System.Text;
using System.Xml;

namespace Opc.Ua.Client.ComplexTypes
namespace Opc.Ua.ComplexTypes
{
/// <summary>
/// The base class for all complex types.
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2 changes: 1 addition & 1 deletion ...lexTypes/Types/ComplexTypePropertyInfo.cs → ...lexTypes/Types/ComplexTypePropertyInfo.cs
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using System.Reflection;
using System.Runtime.Serialization;

namespace Opc.Ua.Client.ComplexTypes
namespace Opc.Ua.ComplexTypes
{
/// <summary>
/// Complex type property info.
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2 changes: 1 addition & 1 deletion ...plexTypes/Types/IComplexTypeProperties.cs → ...plexTypes/Types/IComplexTypeProperties.cs
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using System;
using System.Collections.Generic;

namespace Opc.Ua.Client.ComplexTypes
namespace Opc.Ua.ComplexTypes
{
/// <summary>
/// Interface to access properties of a complex type.
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2 changes: 1 addition & 1 deletion ...xTypes/Types/OptionalFieldsComplexType.cs → ...xTypes/Types/OptionalFieldsComplexType.cs
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using System.Collections.Generic;
using System.Text;

namespace Opc.Ua.Client.ComplexTypes
namespace Opc.Ua.ComplexTypes
{
/// <summary>
/// A complex type with optional fields.
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2 changes: 1 addition & 1 deletion ...pes/Types/StructureDefinitionAttribute.cs → ...pes/Types/StructureDefinitionAttribute.cs
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using System;

namespace Opc.Ua.Client.ComplexTypes
namespace Opc.Ua.ComplexTypes
{
/// <summary>
/// The known base complex types.
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2 changes: 1 addition & 1 deletion ...lexTypes/Types/StructureFieldAttribute.cs → ...lexTypes/Types/StructureFieldAttribute.cs
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using System;

namespace Opc.Ua.Client.ComplexTypes
namespace Opc.Ua.ComplexTypes
{
/// <summary>
/// Attribute for a base complex type field definition.
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2 changes: 1 addition & 1 deletion ...plexTypes/Types/StructureTypeAttribute.cs → ...plexTypes/Types/StructureTypeAttribute.cs
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using System;

namespace Opc.Ua.Client.ComplexTypes
namespace Opc.Ua.ComplexTypes
{
/// <summary>
/// Attribute for type ids of a structure definition.
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2 changes: 1 addition & 1 deletion ...nt.ComplexTypes/Types/UnionComplexType.cs → ...Ua.ComplexTypes/Types/UnionComplexType.cs
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using System.Collections.Generic;
using System.Text;

namespace Opc.Ua.Client.ComplexTypes
namespace Opc.Ua.ComplexTypes
{
/// <summary>
/// Implements a union complex type.
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25 changes: 25 additions & 0 deletions Libraries/Opc.Ua.Server.ComplexTypes/Opc.Ua.Server.ComplexTypes.csproj
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@marcschier marcschier May 28, 2026

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I do not see the need for Opc.Ua.Server.ComplexTypes, can you move the code under the Opc.Ua.Server project, and into a ComplexTypes folder?

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@salihgoncu salihgoncu May 28, 2026

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See previous comment.

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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<AssemblyName>$(AssemblyPrefix).Server.ComplexTypes</AssemblyName>
<TargetFrameworks>$(LibxTargetFrameworks)</TargetFrameworks>
<PackageId>$(PackagePrefix).Opc.Ua.Server.ComplexTypes</PackageId>
<RootNamespace>Opc.Ua.Server.ComplexTypes</RootNamespace>
<Description>OPC UA Complex Types Server Class Library</Description>
<IsPackable>true</IsPackable>
<GenerateDocumentationFile>true</GenerateDocumentationFile>
<IsAotCompatible Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net10.0'))">true</IsAotCompatible>
<Nullable>enable</Nullable>
</PropertyGroup>
<ItemGroup>
<InternalsVisibleTo Include="Opc.Ua.Server.ComplexTypes.Tests" />
</ItemGroup>
<PropertyGroup Condition="'$(Configuration)' == 'Debug'">
<PackageId>$(PackageId).Debug</PackageId>
</PropertyGroup>
<ItemGroup>
<ProjectReference Include="..\..\Stack\Opc.Ua.Core\Opc.Ua.Core.csproj" />
<ProjectReference Include="..\Opc.Ua.Server\Opc.Ua.Server.csproj" />
<ProjectReference Include="..\Opc.Ua.ComplexTypes\Opc.Ua.ComplexTypes.csproj" />
</ItemGroup>
<Target Name="GetPackagingOutputs" />
</Project>
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