/// <summary>
/// terms_stats and terms facet responses have each field in an independent object with all
/// possible operations for that field. Multiple fields means multiple objects
/// each of which might not have all possible terms. Convert that structure into
/// an SQL-style row with one term per row containing each aggregate field and operation combination.
/// </summary>
/// <param name="termsStats">Facets of type terms or terms_stats.</param>
/// <returns>An <see cref="IEnumerable{AggregateRow}"/> containing keys and fields representing
/// the terms and statistics.</returns>
internal IEnumerable <AggregateTermRow> FlattenTermsToAggregateRows(IEnumerable <JToken> termsStats)
{
return(termsStats
.SelectMany(t => t["terms"])
.GroupBy(t => t["term"])
.Select(g => new AggregateTermRow(AggregateRow.ParseValue(g.Key, groupKeyType), g.SelectMany(CreateAggregateFields))));
}
internal static object GetKey(AggregateRow row)
{
if (row is AggregateTermRow)
{
return(((AggregateTermRow)row).Key);
}
if (row is AggregateStatisticalRow)
{
return(((AggregateStatisticalRow)row).Key);
}
return(null);
}
internal static object GetValue(AggregateRow row, string name, string operation, Type valueType)
{
return(row.GetValue(name, operation, valueType));
}