Calum Mackervoy created JENA-2034:
-------------------------------------
Summary: adding GraphNode (N3 formula) to Model
(ARQInternalErrorException)
Key: JENA-2034
URL: https://issues.apache.org/jira/browse/JENA-2034
Project: Apache Jena
Issue Type: Bug
Components: ARQ, Jena, RDF API
Affects Versions: Jena 3.17.0
Environment: * Ubuntu 20.04
* Using Eclipse EE
* Project is running a Tomcat 9 server
Reporter: Calum Mackervoy
I'm attempting to add a Graph node to a Model (N3 formula)
The output should be roughly like the below:
```
<http://localhost:8080/patches/#cf0ba48fa8b0421c8b025c3ea6b41a4f>
a <http://www.w3.org/ns/solid/terms#Patch> ;
<http://www.w3.org/ns/solid/terms#patches>
<http://example.com/#me> ;
<http://www.w3.org/ns/solid/terms#inserts> \{ http://example.com/#me
http://example.com/#property http://example.com/#resource } .
```
Note that the `#inserts` property here is a "GraphNode" or N3 formula, I'm
modelling a graph of the triples to write when a `Task` is complete
I tried the code below:
```
Model out = ModelFactory.createDefaultModel();
out.add(endState, SolidTerms.inserts,
out.asRDFNode(NodeFactory.createGraphNode(inserts.getGraph())));
```
but this throws `[org.apache.jena.sparql.ARQInternalErrorException: Unknown
node type: \{http://example.com/#me @http://example.com/#property
http://example.com/#resource}]`
I've tried many other ways of putting the `Graph` in the model with no success,
posting this one because it was my first and I think the most rational. I think
it's a bug unless Jena just doesn't support the GraphNode type in `RDFNode` ? I
spent a few hours searching the documentation and the web before opening this
issue
The `@` in the error output puzzled me a bit, but I checked that it's not
included in my property definition, it's maybe added in by the
`createGraphNode` or the error serialization
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