[jira] [Created] (JENA-1855) TRIG parser yields NULL-graph for quads in default graph

["Claus Stadler (Jira)" <ji...@apache.org>]

Claus Stadler created JENA-1855:
-----------------------------------

             Summary: TRIG parser yields NULL-graph for quads in default graph
                 Key: JENA-1855
                 URL: https://issues.apache.org/jira/browse/JENA-1855
             Project: Apache Jena
          Issue Type: Improvement
          Components: RIOT
    Affects Versions: Jena 3.14.0
            Reporter: Claus Stadler


Hi Jena Team and Andy, thanks for all your great work on Jena and fixing all my recent issues, but I found another one :)

The Trig Parser yields quads with a null value in the graph component for data in the default graph. It should be Quad.defaultGraphNodeGenerated.

Test data:
{code}
# test.trig
@base <http://www.example.org/base-> .
@prefix : <http://www.example.org/prefx-> .

<s> <p> <o> .
:x :y :z .
{code}

{code:java}
Iterator<Quad> it = RDFDataMgr.createIteratorQuads(RDFDataMgr.open("test.trig"), Lang.TRIG, null);
while(it.hasNext()) {
	Quad q = it.next();
	System.out.println(q.getGraph());
}
{code}

{code}
null
null
{code}


This causes quite unexpected null pointer exceptions, such as in this simple scenario:
{code}		
Dataset ds = RDFDataMgr.loadDataset("test.trig");
System.out.println(ds.asDatasetGraph().size());
{code}




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