@Override
public List<Node> getSubjects(Node predicate, Node object) {
Model graph = null;
GraphConnection graphConnection = null;
try {
graphConnection = openGraph();
graph = graphConnection.getGraph();
graph.enterCriticalSection(Lock.READ);
SimpleSelector selector = getJenaSelector(graph, new StatementImpl(null, predicate, object));
ResIterator it =
graph.listSubjectsWithProperty(selector.getPredicate(), selector.getObject());
List<Node> res = new ArrayList<Node>();
while (it.hasNext()) {
res.add(getNXRelationsNode(it.nextResource().asNode()));
}
return res;
} finally {
if (graph != null) {
graph.leaveCriticalSection();
}
if (graphConnection != null) {
graphConnection.close();
}
}
}
@Override
public boolean hasStatement(Statement statement) {
if (statement == null) {
return false;
}
Model graph = null;
GraphConnection graphConnection = null;
try {
graphConnection = openGraph();
graph = graphConnection.getGraph();
graph.enterCriticalSection(Lock.READ);
SimpleSelector selector = getJenaSelector(graph, statement);
return graph.contains(selector.getSubject(), selector.getPredicate(), selector.getObject());
} finally {
if (graph != null) {
graph.leaveCriticalSection();
}
if (graphConnection != null) {
graphConnection.close();
}
}
}