public AggregationMultiFunctionMethodDesc ValidateAggregationMethod(
ExprValidationContext validationContext,
String aggMethodName,
ExprNode[] @params)
{
aggMethodName = aggMethodName.ToLowerInvariant();
if ((aggMethodName == "countevents") || (aggMethodName == "listreference")) {
if (@params.Length > 0) {
throw new ExprValidationException("Invalid number of parameters");
}
var provider = typeof(AggregationMethodLinearCount);
var result = typeof(int?);
if (aggMethodName == "listreference") {
provider = typeof(AggregationMethodLinearListReference);
result = typeof(IList<EventBean>);
}
return new AggregationMultiFunctionMethodDesc(new AggregationMethodLinearNoParamForge(provider, result), null, null, null);
}
var methodType = AggregationAccessorLinearTypeExtensions.FromString(aggMethodName);
if (methodType == AggregationAccessorLinearType.FIRST || methodType == AggregationAccessorLinearType.LAST) {
return HandleMethodFirstLast(@params, methodType.Value, validationContext);
}
else {
return HandleMethodWindow(@params, validationContext);
}
}
public bool IsAggregationMethod(
string name,
ExprNode[] parameters,
ExprValidationContext validationContext)
{
name = name.ToLowerInvariant();
return AggregationAccessorLinearTypeExtensions.FromString(name) != null ||
(name == "countevents") ||
(name == "listreference");
}