/// <summary>
/// Retrieves the terms aggregation just by it's name
/// </summary>
public static IReadOnlyCollection <KeyedBucket <string> > GetGroupBy(this AggregationsHelper aggs, string aggName)
{
aggs.CheckForAggregationInResult(aggName);
var itemsTerms = aggs.Terms(aggName);
return(itemsTerms.Buckets);
}
public static IEnumerable <KeyItem> GetGroupBy <T>(this AggregationsHelper aggs, Expression <Func <T, Object> > fieldGetter)
{
var aggName = fieldGetter.GetAggName(AggType.GroupBy);
var itemsTerms = aggs.Terms(aggName);
return(itemsTerms.Items);
}
public static IEnumerable <K> GetGroupBy <T, K>(this AggregationsHelper aggs, Expression <Func <T, Object> > fieldGetter, Func <KeyedBucket, K> objectTransformer)
{
var aggName = fieldGetter.GetAggName(AggType.GroupBy);
var itemsTerms = aggs.Terms(aggName);
return(itemsTerms.Buckets.Select(objectTransformer));
}
public static IDictionary <String, K> GetDictionary <T, K>(this AggregationsHelper aggs, Expression <Func <T, Object> > fieldGetter, Func <KeyItem, K> objectTransformer)
{
var aggName = fieldGetter.GetAggName(AggType.GroupBy);
var itemsTerms = aggs.Terms(aggName);
return(itemsTerms.Items.ToDictionary(x => x.Key, objectTransformer));
}
private static IEnumerable <AggregationResult> GetAggregationResultsFrom(AggregationsHelper aggregations)
{
return
(aggregations.Terms(FrameworkAggregationName)
.Items.Select(bucket => new AggregationResult {
Code = bucket.Key, Count = bucket.DocCount
}));
}
public static IDictionary <V, KeyedBucket> GetDictionary <T, V>(this AggregationsHelper aggs, Expression <Func <T, Object> > fieldGetter) where V : struct, IConvertible
{
var aggName = fieldGetter.GetAggName(AggType.GroupBy);
var itemsTerms = aggs.Terms(aggName);
if ((typeof(V).IsEnum))
{
return(itemsTerms.Buckets.ToDictionary(x => Filters.Parse <V>(x.Key)));
}
return(itemsTerms.Buckets.ToDictionary(x => (V)Convert.ChangeType(x.Key, typeof(V))));
}
public static K GetFirstBy <T, K>(this AggregationsHelper aggs, Expression <Func <T, K> > fieldGetter, Expression <Func <T, object> > filterRule = null)
{
var aggName = fieldGetter.GetAggName(AggType.Sum);
if (filterRule == null)
{
var terms = aggs.Terms(aggName);
return(Filters.StringToAnything <K>(terms.Items[0].Key));
}
else
{
var filterName = filterRule.GenerateFilterName();
var filterAgg = aggs.Filter(filterName);
var termsAgg = filterAgg.Terms(aggName);
return(Filters.StringToAnything <K>(termsAgg.Items[0].Key));
}
}
private static IEnumerable <AggregationResult> GetAggregationResultsFrom(AggregationsHelper aggregations)
{
var terms = aggregations.Terms(SubCategoriesAggregationName);
if (terms == null)
{
return(Enumerable.Empty <AggregationResult>());
}
var items = terms.Items.Select(bucket => new AggregationResult
{
Code = bucket.Key,
Count = bucket.DocCount
});
return(items);
}
public static IEnumerable <V> GetDistinct <T, V>(this AggregationsHelper aggs, Expression <Func <T, V> > fieldGetter)
{
var aggName = fieldGetter.GetAggName(AggType.Distinct);
var itemsTerms = aggs.Terms(aggName);
if ((typeof(V).IsEnum))
{
return(itemsTerms.Items.Select((x => Filters.Parse <V>(x.Key))));
}
else if (typeof(V) == typeof(string))
{
return(itemsTerms.Items.Select((x => (V)(object)(x.Key))));
}
else
{
return(itemsTerms.Items.Select((x => (V)(object)(x.Key))));
}
}
private double[] GetNumbers(AggregationsHelper aggregations, IEnumerable <FieldAggregation> fields)
{
var results = new List <double>();
foreach (var field in fields)
{
switch (field.Type)
{
case FieldAggregationType.Average:
results.Add(aggregations.Average(field.Key)?.Value.GetValueOrDefault() ?? 0);
break;
case FieldAggregationType.Distinct:
results.Add(aggregations.Cardinality(field.Key)?.Value.GetValueOrDefault() ?? 0);
break;
case FieldAggregationType.Sum:
results.Add(aggregations.Sum(field.Key)?.Value.GetValueOrDefault() ?? 0);
break;
case FieldAggregationType.Min:
results.Add(aggregations.Min(field.Key)?.Value.GetValueOrDefault() ?? 0);
break;
case FieldAggregationType.Max:
results.Add(aggregations.Max(field.Key)?.Value.GetValueOrDefault() ?? 0);
break;
case FieldAggregationType.Last:
// TODO: Populate with the last value.
break;
case FieldAggregationType.Term:
var termResult = aggregations.Terms(field.Key);
results.Add(termResult?.Items.Count > 0 ? termResult.Items[0].DocCount : 0);
break;
default:
throw new InvalidOperationException($"Unknown FieldAggregation type: {field.Type}");
}
}
return(results.ToArray());
}
public static IEnumerable <V> GetDistinct <T, V>(this AggregationsHelper aggs, Expression <Func <T, V> > fieldGetter)
{
var aggName = fieldGetter.GetAggName(AggType.Distinct);
var itemsTerms = aggs.Terms(aggName);
var targetType = typeof(V);
if (targetType.IsEnum)
{
return(itemsTerms.Buckets.Select((x => Filters.Parse <V>(x.Key))));
}
if (targetType == typeof(string))
{
return(itemsTerms.Buckets.Select(x => x.Key).Cast <V>());
}
if (targetType == typeof(long) || targetType == typeof(int))
{
return(itemsTerms.Buckets.Select(x => long.Parse(x.Key)).Cast <V>());
}
throw new NotImplementedException("You can get only distinct values of Strings, Enums, ints or long");
}
public static IEnumerable <KeyItem> GetGroupBy(this AggregationsHelper aggs, string key)
{
var itemsTerms = aggs.Terms(key);
return(itemsTerms.Items);
}
private double[] GetNumbers(AggregationsHelper aggregations, IEnumerable<FieldAggregation> fields) {
var results = new List<double>();
foreach (var field in fields) {
switch (field.Type) {
case FieldAggregationType.Average:
results.Add(aggregations.Average(field.Key)?.Value.GetValueOrDefault() ?? 0);
break;
case FieldAggregationType.Distinct:
results.Add(aggregations.Cardinality(field.Key)?.Value.GetValueOrDefault() ?? 0);
break;
case FieldAggregationType.Sum:
results.Add(aggregations.Sum(field.Key)?.Value.GetValueOrDefault() ?? 0);
break;
case FieldAggregationType.Min:
results.Add(aggregations.Min(field.Key)?.Value.GetValueOrDefault() ?? 0);
break;
case FieldAggregationType.Max:
results.Add(aggregations.Max(field.Key)?.Value.GetValueOrDefault() ?? 0);
break;
case FieldAggregationType.Last:
// TODO: Populate with the last value.
break;
case FieldAggregationType.Term:
var termResult = aggregations.Terms(field.Key);
results.Add(termResult?.Items.Count > 0 ? termResult.Items[0].DocCount : 0);
break;
default:
throw new InvalidOperationException($"Unknown FieldAggregation type: {field.Type}");
}
}
return results.ToArray();
}
