cdorn commented on issue #2868:
URL: https://github.com/apache/jena/issues/2868#issuecomment-2536361481
Hi, sorry for the typo, its was not #deleteProperties() but
#removeProperties() , below a full example:
`package at.jku.isse.passiveprocessengine.rdf.trialcode;
import java.util.ArrayList;
import java.util.List;
import org.apache.jena.graph.Graph;
import org.apache.jena.ontapi.OntModelFactory;
import org.apache.jena.ontapi.OntSpecification;
import org.apache.jena.ontapi.UnionGraph;
import org.apache.jena.rdf.listeners.StatementListener;
import org.apache.jena.rdf.model.Statement;
import org.apache.jena.rdf.model.impl.ModelCom;
import org.apache.jena.reasoner.InfGraph;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
public class GraphListenerTest {
@Test
void testListenToDeleteEventsWithIncompleteRegistration() {
var listener = new LoggingListener();
var m =
OntModelFactory.createModel(OntSpecification.OWL2_DL_MEM_RDFS_INF);
m.register(listener);
var type = m.createOntClass("http://x";);
type.removeProperties();
Assertions.assertEquals(1, listener.added.size());
// here I dont receive the removed statement
Assertions.assertEquals(1, listener.removed.size());
}
@Test
void testListenToDeleteEventsWithCorrectRegistration() {
var listener = new LoggingListener();
var m =
OntModelFactory.createModel(OntSpecification.OWL2_DL_MEM_RDFS_INF);
m.register(listener);
if (m.getGraph() instanceof InfGraph infG) {
Graph raw = infG.getRawGraph();
if (raw instanceof UnionGraph ugraph) {
ugraph.getEventManager().register(((ModelCom)m).adapt(listener));
}
}
var type = m.createOntClass("http://x";);
type.removeProperties();
// here I receive the same event twice, due to the two listener
registrations
Assertions.assertEquals(2, listener.added.size());
Assertions.assertEquals(1, listener.removed.size());
}
public static class LoggingListener extends StatementListener {
private final List<Statement> added = new ArrayList<>();
private final List<Statement> removed = new ArrayList<>();
@Override
public void addedStatement(Statement s) {
System.out.println("ADDED "+s.toString());
added.add(s);
}
@Override
public void removedStatement(Statement s) {
System.out.println("REMOVED "+s.toString());
removed.add(s);
}
}
}
`
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