private Graph getOrCreatePermisionGraph() {
try {
return tcManager.getMGraph(permissionGraphName);
} catch (NoSuchEntityException e) {
return tcManager.createGraph(permissionGraphName);
}
}
private LockableMGraph getDataGraph() {
try {
return tcm.getMGraph(DATA_GRAPH_URI);
} catch (NoSuchEntityException e) {
return tcm.createMGraph(DATA_GRAPH_URI);
}
}
private Collection<String> getRequiredPermissionStrings(final IRI GraphUri, IRI property) {
try {
final Graph permissionMGraph = tcManager.getMGraph(permissionGraphName);
Lock l = permissionMGraph.getLock().readLock();
l.lock();
try {
Triple t = permissionMGraph.filter(GraphUri, property, null).next();
BlankNodeOrIRI list = (BlankNodeOrIRI) t.getObject();
LinkedList<String> result = new LinkedList<String>();
readList(list, permissionMGraph, result);
return result;
} catch (NoSuchElementException e) {
return new ArrayList<String>(0);
} finally {
l.unlock();
}
} catch (NoSuchEntityException e) {
return new ArrayList<String>(0);
}
}