private IAggregationInstance CreateAggregatorInstance(DistinctAggregator aggregator)
{
switch (aggregator)
{
case DistinctAggregator.First: return(new FirstAggregationInstance());
case DistinctAggregator.FirstNotNull: return(new FirstNotNullAggregationInstance());
case DistinctAggregator.Last: return(new LastAggregationInstance());
case DistinctAggregator.Max: return(new MaxAggregationInstance());
case DistinctAggregator.Min: return(new MinAggregationInstance());
case DistinctAggregator.Sum: return(new SumAggregationInstance());
case DistinctAggregator.Avg: return(new AvgAggregationInstance());
}
return(null);
}
public AggregationBuilder <T> ForProperty <X>(Expression <Func <T, X> > getProperty, DistinctAggregator aggregator)
{
_aggregators[getProperty.GetPropertyInfo().Name] = aggregator;
return(this);
}
