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package com.salesforce.phoenix.iterate;
import java.sql.SQLException;
import java.util.List;
import com.salesforce.phoenix.expression.OrderByExpression;
import com.salesforce.phoenix.schema.tuple.Tuple;
/**
* Result scanner that sorts aggregated rows by columns specified in the ORDER BY clause.
* <p>
* Note that currently the sort is entirely done in memory.
*
* @author syyang
* @since 0.1
*/
public class OrderedAggregatingResultIterator extends OrderedResultIterator implements AggregatingResultIterator {
public OrderedAggregatingResultIterator(AggregatingResultIterator delegate,
List<OrderByExpression> orderByExpressions,
int thresholdBytes, Integer limit) throws SQLException {
super (delegate, orderByExpressions, thresholdBytes, limit);
}
@Override
protected AggregatingResultIterator getDelegate() {
return (AggregatingResultIterator)super.getDelegate();
}
@Override
public Tuple next() throws SQLException {
Tuple tuple = super.next();
if (tuple != null) {
aggregate(tuple);
}
return tuple;
}
@Override
public void aggregate(Tuple result) {
getDelegate().aggregate(result);
}
}