public AggregationFilterModel <TParameters> FilterModelFor(Expression <Func <TParameters, string> > expression)
{
var filterName = GetFilterNameFrom(expression);
if (Aggregations.ContainsKey(filterName) && Aggregations[filterName] is AggregationFilterModel <TParameters> p)
{
return(p);
}
throw new ArgumentOutOfRangeException(nameof(filterName), filterName, "Unable to find filter with the given name");
}
/// <summary>
/// Returns the matching Aggregation of type Nested
/// </summary>
/// <param name="fieldExpression">The same expression used in the query.</param>
/// <param name="limit">How many levels to check (default: 100)</param>
/// <returns>Aggregation</returns>
public Aggregation NestedAggregation(Expression <Func <T, object> > fieldExpression, bool filtered = false, int limit = 100)
{
var exists = false;
var c = 0;
var aggName = $"nested_{ExpressionHelper.GetPropertyName(fieldExpression)}_{c}";
while (!exists && c < limit)
{
if (Aggregations.ContainsKey(aggName))
{
exists = true;
continue;
}
c++;
aggName = $"nested_{ExpressionHelper.GetPropertyName(fieldExpression)}_{c}";
}
return(Aggregations[aggName]);
}
/// <summary> /// 集団が存在するかどうか /// </summary> /// <param name="aggregationName">集団名</param> /// <returns>存在するかどうか</returns> public static bool HasAggregation(string aggregationName) => string.IsNullOrEmpty(aggregationName) == true ? false : Aggregations.ContainsKey(aggregationName);
