Ah sorry, I was wrong. You call remove on the RDFList object.
According to the implementation, it should modify the current list
object. Have you tried it out? Does it not work?
>> Hello!
>>
>> I have an application, which creates an individual called batch. A batch has
>> a list of company IDs (strings). Add the property like this:
>>
>> open fun addCompanyIdsList(
>> batch: Resource,
>> companyIds: List<String>,
>> model: Model) {
>> val prop = model.createProperty(Bp2BatchCompanyIds)
>> val list = model.createList()
>> companyIds
>> .filter { it.isNumeric() }
>> .map { it.toInt() }
>> .map { id -> model.createTypedLiteral(id) }
>> .forEach { literal -> list.add(literal) }
>> batch.addProperty(prop, list)
>> }
>>
>> In another operation I want to remove the first element of the list so that
>> this change is saved in Jena. For primitive data types like integers, there
>> is the method
>>
>> org.apache.jena.rdf.model.Statement#changeLiteralObject(boolean)
>>
>> and its analogs.
>>
>> How do I change the list? Is it sufficient to just remove an element from
>> the list like in the code snippet below?
>>
>> ds.begin(ReadWrite.WRITE)
>> val query = createQuery("""SELECT ?x
>> WHERE { ?x $Bp2BatchNumber
>> $batchId }""")
>> val qexec = createQueryExecution(ds, query)
>> val rs = qexec.execSelect()
>> val sol = rs.nextSolution()
>> val rec = sol["x"]
>> val prop = findStatement(Bp2BatchCompanyIds, rec as Resource)
>> val companyIds = prop.`object` as RDFList
>> val head = companyIds.head
>> companyIds.remove(result)
>> ds.end()
> Which programming language is this?
> Does your code compile? I'm asking because there is just a getHead()
> method on an RDFList object. And this one returns an RDFNode object,
> thus, remove should be impossible here.
>> Thanks in advance
>>
>> Dmitri Pisarenko
>>
--
Lorenz Bühmann
AKSW group, University of Leipzig
Group: http://aksw.org - semantic web research center
