@Override
public void clear() {
Model graph = null;
GraphConnection graphConnection = null;
try {
graphConnection = openGraph();
graph = graphConnection.getGraph();
graph.enterCriticalSection(Lock.READ);
graph.removeAll();
// XXX AT: remove reification quadlets explicitly
RSIterator it = graph.listReifiedStatements();
List<ReifiedStatement> rss = new ArrayList<ReifiedStatement>();
while (it.hasNext()) {
rss.add(it.nextRS());
}
for (ReifiedStatement rs : rss) {
graph.removeReification(rs);
}
} finally {
if (graph != null) {
graph.leaveCriticalSection();
}
if (graphConnection != null) {
graphConnection.close();
}
}
}
@Override
public void remove(List<Statement> statements) {
Model graph = null;
GraphConnection graphConnection = null;
try {
graphConnection = openGraph();
graph = graphConnection.getGraph();
graph.enterCriticalSection(Lock.WRITE);
for (Statement nuxStmt : statements) {
com.hp.hpl.jena.graph.Node subject = getJenaNode(nuxStmt.getSubject());
com.hp.hpl.jena.graph.Node predicate = getJenaNode(nuxStmt.getPredicate());
com.hp.hpl.jena.graph.Node object = getJenaNode(nuxStmt.getObject());
Triple jenaTriple = Triple.create(subject, predicate, object);
com.hp.hpl.jena.rdf.model.Statement jenaStmt = graph.asStatement(jenaTriple);
graph.remove(jenaStmt);
// remove properties
RSIterator it = graph.listReifiedStatements(jenaStmt);
while (it.hasNext()) {
ReifiedStatement rs = it.nextRS();
rs.removeProperties();
}
// remove quadlets
graph.removeAllReifications(jenaStmt);
// graph.removeReification(reifiedStmt);
}
} finally {
if (graph != null) {
graph.leaveCriticalSection();
}
if (graphConnection != null) {
graphConnection.close();
}
}
}
/**
* Find any existing reified statement that reifies a givem statement. If there isn't one, create
* one.
*
* @param s a Statement for which to find [or create] a reification
* @return a reification for s, re-using an existing one if possible
*/
public Resource getAnyReifiedStatement(Statement s) {
RSIterator it = listReifiedStatements(s);
if (it.hasNext())
try {
return it.nextRS();
} finally {
it.close();
}
else return createReifiedStatement(s);
}
