heisenbergs-uncertainty commented on issue #3632:
URL: https://github.com/apache/streampipes/issues/3632#issuecomment-2941101864
> Thanks for your detailed description!
> There were indeed some changes we did in addition to the NamingStrategy
that were meant to extend the set of supported OPC-UA types (ExtensionObjects
and some other Basic Data Types). But it seems something is broken/unsupported
here.
> Since it's hard for me to reproduce, let's find a solution together ;-)
>
> Currently we do the following:
> For each selected node, we check if the type is a
``BaseDataVariableTypeNode``.
>
> ```java
> if (node instanceof BaseDataVariableTypeNode) {
> var nodeInfo = new BasicVariableNodeInfo((BaseDataVariableTypeNode)
node, spOpcConfig.getNamingStrategy());
> return OpcUaNodeFactory.createOpcUaNode(nodeInfo,
runtimeNamesToDelete);
> }
>
> throw new UaException(StatusCode.BAD, "Node is not of type
BaseDataVariableTypeNode");
> }
> ```
>
> The exception thrown here looks similar to your first error message so I
think the node has a type that can not be assigned to BaseDatavariableTypeNode.
Do you have any insights which unsupported data type the node might have?
>
> If this part of the code succeeds, we check if the variable is a built-in
type or a extension object. For an extension object, we try to decode the value
so that it is properly parsed to a StreamPipes event.
>
> This is done by this snippet:
>
> ```java
> private Struct extractStruct(OpcUaClient client,
> Variant variant) {
> if (variant.getValue() instanceof ExtensionObject extensionObject) {
> var decoded =
extensionObject.decode(client.getDynamicSerializationContext());
> if (decoded instanceof Struct struct) {
> return struct;
> }
> }
> throw new SpRuntimeException("Decoded value is not a Struct");
> }
> ```
>
> It seems that the extension object cannot be properly decoded in your case.
> What do you think - should we add some more info to the Node Details
section and logging to understand what these unsupported data types are?
>
>
>
>
Im not 100% sure. I'm thinking that the issue is around poorly structured
Data Types. The vendor I work with created this OPC Server and custom
namespaces.
I will do some debugging locally this week and see if I can potentially
figure out what is going on. And either submit a PR or at least leave some more
detailed debugging info here.
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