Examples with NodeIterator org.apache.jena.rdf.model.NodeIterator used on opensource projects

Example 16 with NodeIterator

use of org.apache.jena.rdf.model.NodeIterator in project jena by apache.

the class TestReasoners method doTestTransitiveReduction.

/**
 * Test that a transitive reduction is complete.
 * Assumes test graph has no cycles (other than the trivial
 * identity ones).
 */
public void doTestTransitiveReduction(Model model, Property dp) {
    InfModel im = ModelFactory.createInfModel(ReasonerRegistry.getTransitiveReasoner(), model);
    for (ResIterator i = im.listSubjects(); i.hasNext(); ) {
        Resource base = i.nextResource();
        List<RDFNode> directLinks = new ArrayList<>();
        for (NodeIterator j = im.listObjectsOfProperty(base, dp); j.hasNext(); ) {
            directLinks.add(j.next());
        }
        for (int n = 0; n < directLinks.size(); n++) {
            Resource d1 = (Resource) directLinks.get(n);
            for (int m = n + 1; m < directLinks.size(); m++) {
                Resource d2 = (Resource) directLinks.get(m);
                if (im.contains(d1, dp, d2) && !base.equals(d1) && !base.equals(d2)) {
                    assertTrue("Triangle discovered in transitive reduction", false);
                }
            }
        }
    }
}