Aklakan opened a new issue, #1476:
URL: https://github.com/apache/jena/issues/1476
### Version
4.6.0-SNAPSHOT
### What happened?
While creating an assembler config that creates two services with different
configurations over the same spatial dataset we noticed that the spatial index
was unexpectedly loaded twice. The assembler framework documentation suggests
that - by default - the same Java object created from an RDF resource should be
reused wherever that RDF resource is referenced in the assembler spec.
However, in the code, the Mode flag is eventually ignored and always a fresh
Java object is returned:
```java
public abstract class DatasetAssembler {
@Override
public Dataset open(Assembler a, Resource root, Mode mode) {
DatasetGraph dsg = createDataset(a, root) ;
return DatasetFactory.wrap(dsg);
}
}
```
I am not yet sure of the assembler life-cycle: Whether the cache of created
objects would have to be an additional argument to the assembler, or whether it
can be an attribute of the assembler.
### Relevant output and stacktrace
_No response_
### Are you interested in making a pull request?
Maybe
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