Re: Problems using DataSetGraph.deleteAny

[Timo Westkämper]

Hi.

Same problem with Node.ANY :
        DataSource dataSource = DataSourceImpl.createMem();
        Node subject = Node.createURI(TEST.NS);
        Node predicate = Node.createURI(RDFS.label.getId());
        Node object = Node.createAnon();
        dataSource.asDatasetGraph().add(new Quad(Quad.defaultGraphIRI, 
subject, predicate, object));
        dataSource.asDatasetGraph().deleteAny(Node.ANY, subject, 
Node.ANY, Node.ANY);

I am using the SPI, since the lower level integration seems to be 
enough. I am writing Jean support for another RDF abstraction layer, the 
stuff of the higher level API is not needed.

Br,
Timo Westkämper

On 01/22/2011 09:25 PM, Damian Steer wrote:

On 22 Jan 2011, at 14:31, Timo Westkämper<timo.westkam...@mysema.com>  wrote:

Hi.

Hi Timo,


I am having issues with the following code

        DataSource dataSource = DataSourceImpl.createMem();
        Node subject = Node.createURI(TEST.NS);
        Node predicate = Node.createURI(RDFS.label.getId());
        Node object = Node.createAnon();
        dataSource.asDatasetGraph().add(new Quad(Quad.defaultGraphIRI, subject, 
predicate, object));
        dataSource.asDatasetGraph().deleteAny(null, subject, null, null);

The last line throws the following Exception :

java.lang.NullPointerException
    at com.hp.hpl.jena.sparql.core.Quad.isDefaultGraph(Quad.java:87)
    at 
com.hp.hpl.jena.sparql.core.DatasetGraphCollection.fetchGraph(DatasetGraphCollection.java:75)
    at 
com.hp.hpl.jena.sparql.core.DatasetGraphCollection.delete(DatasetGraphCollection.java:33)
    at 
com.hp.hpl.jena.sparql.core.DatasetGraphBase.deleteAny(DatasetGraphBase.java:79)

Am I using the API wrong?
You're using the SPI, not the API (the model / resource stuff). Unlike the API, 
where you use 'null' to match anything, the SPI uses Node.ANY (hence your 
issue).

Out of interest, why are you using the SPI?

Damian