/// <summary>
/// Aggregate resuts over a clause
/// </summary>
/// <param name="groupField">Field that will be used as term to group aggregation results</param>
/// <param name="field">Id field uppon the aggregation will be used</param>
/// <param name="aggType">Type of Aggregation</param>
public FindRequest <T> TermAggregation(Expression <Func <T, object> > groupField, Expression <Func <T, object> > field, EnAggregationType aggType)
{
//Get term
var termName = Utils.ExpressionAttributeName(groupField);
TermsAggregation term = null;
if (!searchInfo.termDictionary.ContainsKey(termName))
{
term = new TermsAggregation(termName)
{
Field = groupField
};
searchInfo.termDictionary.Add(termName, term);
}
else
{
term = searchInfo.termDictionary[termName];
}
if (term != null)
{
//if(agg)
AggregationContainer aggr = null;
string pKey = "";
switch (aggType)
{
case EnAggregationType.Sum:
pKey = string.Format("{0}_sum", termName);
aggr = new SumAggregation(pKey, field);
break;
case EnAggregationType.Average:
pKey = string.Format("{0}_avg", termName);
aggr = new AverageAggregation(pKey, field);
break;
case EnAggregationType.Min:
pKey = string.Format("{0}_min", termName);
aggr = new MinAggregation(pKey, field);
break;
case EnAggregationType.Max:
pKey = string.Format("{0}_max", termName);
aggr = new MaxAggregation(pKey, field);
break;
}
if (aggr != null)
{
if (term.Aggregations == null)
{
term.Aggregations = new AggregationDictionary();
}
term.Aggregations.Add(pKey, aggr);
}
}
return(this);
}
/// <summary>
/// Aggregate resuts
/// </summary>
/// <param name="key">Key identifier of results</param>
/// <param name="field">Id field uppon the aggregation will be used</param>
/// <param name="aggType">Type of Aggregation</param>
public FindRequest <T> Aggregation(string key, Expression <Func <T, object> > field, EnAggregationType aggType)
{
AggregationContainer aggr = null;
switch (aggType)
{
case EnAggregationType.Sum:
aggr = new SumAggregation(key, field);
break;
case EnAggregationType.Average:
aggr = new AverageAggregation(key, field);
break;
case EnAggregationType.Min:
aggr = new MinAggregation(key, field);
break;
case EnAggregationType.Max:
aggr = new MaxAggregation(key, field);
break;
}
if (aggr != null)
{
searchInfo.Aggregations.Add(key, aggr);
}
return(this);
}
