@Override
public boolean hasNext() throws SqlJetException {
// DocumentRecord[] lasts=new DocumentRecord[iters.size()];
DocumentRecord oldest = null;
// boolean allNoNext=false;
while (true) {
boolean succ = true;
for (DocumentRecordIterator it : iters) {
if (!it.hasNext()) {
// Log.d("intersect", it+" has no more elements");
return false;
}
DocumentRecord cur = it.next();
// Log.d("intersect", "Get from "+it+" cur="+cur+" oldest="+oldest+"
// cur.lu="+cur.lastUpdate);
if (oldest == null) {
oldest = cur;
} else {
while (cur.lastUpdate > oldest.lastUpdate) {
if (!it.hasNext()) {
// Log.d("intersect", it+" has no more elements2");
return false;
}
cur = it.next();
// Log.d("intersect", "Get from2 "+it+" cur="+cur+" oldest="+oldest+"
// cur.lu="+cur.lastUpdate);
}
if (cur.lastUpdate < oldest.lastUpdate) {
// Log.d("intersect", "Retry: "+cur+" is older than "+oldest);
oldest = cur;
succ = false;
break;
}
}
}
if (succ) {
next = oldest;
// Log.d("intersect", " succ next="+oldest);
return next != null;
}
}
}
@Override
public void close() throws SqlJetException {
for (DocumentRecordIterator it : iters) {
it.close();
}
}