@Override
public Tuple next() throws IOException {
Tuple aTuple;
Tuple outTuple = new VTuple(outColumnNum);
if (isClosed) {
return null;
}
if (cachedData.size() == 0) {
rescan();
}
if (!scanNode.hasQual()) {
if (currentRow < cachedData.size()) {
aTuple = cachedData.get(currentRow++);
projector.eval(aTuple, outTuple);
outTuple.setOffset(aTuple.getOffset());
return outTuple;
}
return null;
} else {
while (currentRow < cachedData.size()) {
aTuple = cachedData.get(currentRow++);
if (qual.eval(aTuple).isTrue()) {
projector.eval(aTuple, outTuple);
return outTuple;
}
}
return null;
}
}
