public AggregateKey(string name, string fn, string argumments)
{
this.Name = name;
this.Arguments = argumments;
if (!String.IsNullOrEmpty(fn))
{
var fns = (new DonutFunctions());
Operation = DonutFunction.Wrap(fns.GetFunction(fn));
}
}
static DonutFunctions()
{
Functions = new Dictionary <string, IDonutFunction>();
Functions["sum"] = new DonutFunction("sum")
{
Type = DonutFunctionType.GroupField,
IsAggregate = true,
GroupValue = (new BsonDocument {
{ "$sum", "{0}" }
}).ToString()
};
Functions["max"] = new DonutFunction("max")
{
Type = DonutFunctionType.GroupField,
IsAggregate = true,
GroupValue = (new BsonDocument {
{ "$max", "{0}" }
}).ToString()
};
Functions["min"] = new DonutFunction("min")
{
Type = DonutFunctionType.GroupField,
IsAggregate = true,
GroupValue = (new BsonDocument {
{ "$min", "{0}" }
}).ToString()
};
Functions["num_unique"] = new DonutFunction("num_unique")
{
IsAggregate = true
};
Functions["std"] = new DonutFunction("std")//Disables because mongo doesn't handle it right
{
Type = DonutFunctionType.GroupField,
IsAggregate = true,
GroupValue = (new BsonDocument {
{ "$stdDevPop", "{0}" }
}).ToString()
};
Functions["mean"] = new DonutFunction("mean")
{
Type = DonutFunctionType.GroupField,
IsAggregate = true,
GroupValue = (new BsonDocument {
{ "$avg", "{0}" }
}).ToString()
};
Functions["avg"] = new DonutFunction("avg")
{
Type = DonutFunctionType.GroupField,
IsAggregate = true,
GroupValue = (new BsonDocument {
{ "$avg", "{0}" }
}).ToString()
};
// Functions["num_unique"] = new DonutFunction("num_unique")
// {
// Type = DonutFunctionType.GroupKey,
// IsAggregate = true,
// GroupValue = (new BsonDocument { { "{0}", "{1}"} }).ToString()
// };
// Functions["skew"] = new DonutFunction("skew")
// { IsAggregate = true };
Functions["day"] = new DonutFunction("day")
{
Type = DonutFunctionType.Project,
IsAggregate = true,
Projection = (new BsonDocument {
{ "$dayOfMonth", "{0}" }
}).ToString(),
Eval = (x) => x.AsDateTime.Day
};
Functions["hour"] = new DonutFunction("hour")
{
Type = DonutFunctionType.Project,
IsAggregate = true,
Projection = (new BsonDocument {
{ "$hour", "{0}" }
}).ToString(),
Eval = (x) => x.AsDateTime.Hour
};
Functions["month"] = new DonutFunction("month")
{
Type = DonutFunctionType.Project,
IsAggregate = true,
Projection = (new BsonDocument {
{ "$month", "{0}" }
}).ToString(),
Eval = (x) => x.AsDateTime.Month
};
Functions["year"] = new DonutFunction("year")
{
Type = DonutFunctionType.Project,
IsAggregate = true,
Projection = (new BsonDocument {
{ "$year", "{0}" }
}).ToString(),
Eval = (x) => x.AsDateTime.Year
};
Functions["weekday"] = new DonutFunction("weekday")
{
Type = DonutFunctionType.Project,
IsAggregate = true,
Projection = (new BsonDocument {
{ "$dayOfWeek", "{0}" }
}).ToString(),
Eval = (x) => x.AsDateTime.DayOfWeek
};
Functions["yearday"] = new DonutFunction("yearday")
{
Type = DonutFunctionType.Project,
IsAggregate = true,
Projection = (new BsonDocument {
{ "$dayOfYear", "{0}" }
}).ToString(),
Eval = (x) => x.AsDateTime.DayOfYear
};
Functions["dayofyear"] = new DonutFunction("dayOfYear")
{
Type = DonutFunctionType.Project,
IsAggregate = true,
Projection = (new BsonDocument {
{ "$dayOfYear", "{0}" }
}).ToString(),
Eval = (x) => x.AsDateTime.DayOfYear
};
Functions["mode"] = new DonutFunction("mode")
{
IsAggregate = false
};
Functions["first"] = new DonutFunction("first")
{
Type = DonutFunctionType.GroupField,
IsAggregate = true,
Projection = (new BsonDocument {
{ "$first", "{0}" }
}).ToString()
};
Functions["last"] = new DonutFunction("last")
{
Type = DonutFunctionType.GroupField,
IsAggregate = true,
Projection = (new BsonDocument {
{ "$last", "{0}" }
}).ToString()
};
//Custom functions
Functions["dstime"] = new DsTime("dstime")
{
Type = DonutFunctionType.GroupField,
IsAggregate = false
};
Functions["num_unique"] = new NumUnique("num_unique")
{
Type = DonutFunctionType.Donut,
IsAggregate = false
};
//Functions["time"] = "(function(timeElem){ return timeElem.getTime() })";
}