static Set<BlankNode> getBNodes(Collection<Triple> s) {
Set<BlankNode> result = new HashSet<BlankNode>();
for (Triple triple : s) {
if (triple.getSubject() instanceof BlankNode) {
result.add((BlankNode) triple.getSubject());
}
if (triple.getObject() instanceof BlankNode) {
result.add((BlankNode) triple.getObject());
}
}
return result;
}
private static boolean isGrounded(Triple triple) {
if (triple.getSubject() instanceof BlankNode) {
return false;
}
if (triple.getObject() instanceof BlankNode) {
return false;
}
return true;
}