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// Copyright 2012-present Oliver Eilhard. All rights reserved.
// Use of this source code is governed by a MIT-license.
// See http://olivere.mit-license.org/license.txt for details.
package elastic
// PercentilesAggregation
// See: https://www.elastic.co/guide/en/elasticsearch/reference/5.2/search-aggregations-metrics-percentile-aggregation.html
type PercentilesAggregation struct {
field string
script *Script
format string
subAggregations map[string]Aggregation
meta map[string]interface{}
percentiles []float64
method string
compression *float64
numberOfSignificantValueDigits *int
estimator string
}
func NewPercentilesAggregation() *PercentilesAggregation {
return &PercentilesAggregation{
subAggregations: make(map[string]Aggregation),
percentiles: make([]float64, 0),
method: "tdigest",
}
}
func (a *PercentilesAggregation) Field(field string) *PercentilesAggregation {
a.field = field
return a
}
func (a *PercentilesAggregation) Script(script *Script) *PercentilesAggregation {
a.script = script
return a
}
func (a *PercentilesAggregation) Format(format string) *PercentilesAggregation {
a.format = format
return a
}
func (a *PercentilesAggregation) SubAggregation(name string, subAggregation Aggregation) *PercentilesAggregation {
a.subAggregations[name] = subAggregation
return a
}
// Meta sets the meta data to be included in the aggregation response.
func (a *PercentilesAggregation) Meta(metaData map[string]interface{}) *PercentilesAggregation {
a.meta = metaData
return a
}
func (a *PercentilesAggregation) Percentiles(percentiles ...float64) *PercentilesAggregation {
a.percentiles = append(a.percentiles, percentiles...)
return a
}
// Method is the percentiles method, which can be "tdigest" (default) or "hdr".
func (a *PercentilesAggregation) Method(method string) *PercentilesAggregation {
a.method = method
return a
}
func (a *PercentilesAggregation) Compression(compression float64) *PercentilesAggregation {
a.compression = &compression
return a
}
func (a *PercentilesAggregation) NumberOfSignificantValueDigits(digits int) *PercentilesAggregation {
a.numberOfSignificantValueDigits = &digits
return a
}
func (a *PercentilesAggregation) Estimator(estimator string) *PercentilesAggregation {
a.estimator = estimator
return a
}
func (a *PercentilesAggregation) Source() (interface{}, error) {
// Example:
// {
// "aggs" : {
// "load_time_outlier" : {
// "percentiles" : {
// "field" : "load_time"
// }
// }
// }
// }
// This method returns only the
// { "percentiles" : { "field" : "load_time" } }
// part.
source := make(map[string]interface{})
opts := make(map[string]interface{})
source["percentiles"] = opts
// ValuesSourceAggregationBuilder
if a.field != "" {
opts["field"] = a.field
}
if a.script != nil {
src, err := a.script.Source()
if err != nil {
return nil, err
}
opts["script"] = src
}
if a.format != "" {
opts["format"] = a.format
}
if len(a.percentiles) > 0 {
opts["percents"] = a.percentiles
}
switch a.method {
case "tdigest":
if c := a.compression; c != nil {
opts[a.method] = map[string]interface{}{
"compression": *c,
}
}
case "hdr":
if n := a.numberOfSignificantValueDigits; n != nil {
opts[a.method] = map[string]interface{}{
"number_of_significant_value_digits": *n,
}
}
}
if a.estimator != "" {
opts["estimator"] = a.estimator
}
// AggregationBuilder (SubAggregations)
if len(a.subAggregations) > 0 {
aggsMap := make(map[string]interface{})
source["aggregations"] = aggsMap
for name, aggregate := range a.subAggregations {
src, err := aggregate.Source()
if err != nil {
return nil, err
}
aggsMap[name] = src
}
}
// Add Meta data if available
if len(a.meta) > 0 {
source["meta"] = a.meta
}
return source, nil
}
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