cdorn opened a new issue, #2868:
URL: https://github.com/apache/jena/issues/2868
### Version
5.1.0
### What happened?
Given OntModel m with inference model:
var m = OntModelFactory.createModel( OntSpecification.OWL2_DL_MEM_RDFS_INF );
Given we register some model changed listener:
m.register(listener);
and we create a type
var type = m.createOntClass(SOMEURI);
and we delete that type:
type.deleteProperties();
then listener is not called with any deleted statements.
I also identified the cause:
inside ModelCom.register(ModelChangedListener listener) //line 1359
the getGraph() call returns the inference graph and not the underlying
UnionGraph, hence any fine granular changes in the union graph and below have
no listener registered
my current work around is pasted below in "Relevant output and stacktrace"
not sure if that workaround would work for other OntModel implementations
and inference models.
### Relevant output and stacktrace
```shell
my current workaround is:
private void register(OntModel model, ModelChangedListener listener) {
var given = model.getGraph();
if (given instanceof InfGraph infG) {
Graph raw = infG.getRawGraph();
if (raw instanceof UnionGraph ugraph) {
ugraph.getEventManager().register(((ModelCom)model).adapt(listener));
}
}
if (given instanceof UnionGraph ugraph) {
ugraph.getEventManager().register(((ModelCom)model).adapt(listener));
}
}
```
### Are you interested in making a pull request?
Maybe
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