public GroupReduceWithCombineProperties(
FieldSet groupKeys, Ordering additionalOrderKeys, Partitioner<?> customPartitioner) {
super(groupKeys);
// if we have an additional ordering, construct the ordering to have primarily the grouping
// fields
if (additionalOrderKeys != null) {
this.ordering = new Ordering();
for (Integer key : this.keyList) {
this.ordering.appendOrdering(key, null, Order.ANY);
}
// and next the additional order fields
for (int i = 0; i < additionalOrderKeys.getNumberOfFields(); i++) {
Integer field = additionalOrderKeys.getFieldNumber(i);
Order order = additionalOrderKeys.getOrder(i);
this.ordering.appendOrdering(field, additionalOrderKeys.getType(i), order);
}
} else {
this.ordering = null;
}
this.customPartitioner = customPartitioner;
}
