@SuppressWarnings("unchecked")
private void accumulateData() throws ExecException {
int count = 0;
int length = inputs.size() - 1;
inputBags = new DataBag[length];
its = new Iterator[length];
for (int i = 0; i < length; ++i) {
PhysicalOperator op = inputs.get(i);
DataBag bag = BagFactory.getInstance().newDefaultBag();
inputBags[count] = bag;
for (Result res = op.getNextTuple();
res.returnStatus != POStatus.STATUS_EOP;
res = op.getNextTuple()) {
if (res.returnStatus == POStatus.STATUS_NULL) continue;
if (res.returnStatus == POStatus.STATUS_ERR)
throw new ExecException("Error accumulating data in the local Cross operator");
if (res.returnStatus == POStatus.STATUS_OK) bag.add((Tuple) res.result);
}
its[count++] = bag.iterator();
}
}
