@Override
public void close() throws IOException {
// all other scanners are closed already
for (TripleScanner scanner : scannerHeap) {
scanner.close();
}
}
private Triple popTriple() throws IOException {
// get top scanner
TripleScanner scanner = scannerHeap.poll();
// remove next triple
Triple next = scanner.pop();
// more triples in this scanner?
if (scanner.next()) {
// yep, put it back
scannerHeap.add(scanner);
} else {
// nope, we're done with it
scanner.close();
}
return next;
}
@Override
public int compare(TripleScanner s1, TripleScanner s2) {
return order.comparator().compare(s1.peek(), s2.peek());
}