private void SetFacet(Expression <Func <T, object> > path, FacetAggregation facetAggregation)
{
var last = facets.Last();
last.Aggregation |= facetAggregation;
if (facetAggregation == FacetAggregation.Count &&
string.IsNullOrEmpty(last.AggregationField) == false)
{
return;
}
if ((string.IsNullOrEmpty(last.AggregationField) == false) && (!last.AggregationField.Equals(path.ToPropertyPath())))
{
throw new InvalidOperationException("Cannot call different aggregation function with differentt parameters at the same aggregation. Use AndAggregateOn");
}
last.AggregationField = path.ToPropertyPath();
last.AggregationType = path.ExtractTypeFromPath().FullName;
}
public double? GetAggregation(FacetAggregation aggregation)
{
switch (aggregation)
{
case FacetAggregation.None:
return null;
case FacetAggregation.Count:
return Count;
case FacetAggregation.Max:
return Max;
case FacetAggregation.Min:
return Min;
case FacetAggregation.Average:
return Average;
case FacetAggregation.Sum:
return Sum;
default:
return null;
}
}
private FacetAggregationToken(string fieldName, FacetAggregation aggregation)
{
_fieldName = fieldName;
_aggregation = aggregation;
}
private static bool IsAggregationNumerical(FacetAggregation aggregation)
{
switch (aggregation)
{
case FacetAggregation.Average:
case FacetAggregation.Count:
case FacetAggregation.Max:
case FacetAggregation.Min:
case FacetAggregation.Sum:
return true;
default:
return false;
}
}
