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120 lines
3.4 KiB
Go
120 lines
3.4 KiB
Go
// Copyright 2012-present Oliver Eilhard. All rights reserved.
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// Use of this source code is governed by a MIT-license.
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// See http://olivere.mit-license.org/license.txt for details.
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package elastic
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// MedianAbsoluteDeviationAggregation is a measure of variability.
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// It is a robust statistic, meaning that it is useful for describing data
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// that may have outliers, or may not be normally distributed.
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// For such data it can be more descriptive than standard deviation.
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//
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// See https://www.elastic.co/guide/en/elasticsearch/reference/7.6/search-aggregations-metrics-median-absolute-deviation-aggregation.html
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// for details.
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type MedianAbsoluteDeviationAggregation struct {
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field string
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compression *float64
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script *Script
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format string
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missing interface{}
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subAggregations map[string]Aggregation
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meta map[string]interface{}
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}
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func NewMedianAbsoluteDeviationAggregation() *MedianAbsoluteDeviationAggregation {
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return &MedianAbsoluteDeviationAggregation{
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subAggregations: make(map[string]Aggregation),
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}
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}
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func (a *MedianAbsoluteDeviationAggregation) Field(field string) *MedianAbsoluteDeviationAggregation {
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a.field = field
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return a
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}
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func (a *MedianAbsoluteDeviationAggregation) Compression(compression float64) *MedianAbsoluteDeviationAggregation {
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a.compression = &compression
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return a
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}
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func (a *MedianAbsoluteDeviationAggregation) Script(script *Script) *MedianAbsoluteDeviationAggregation {
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a.script = script
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return a
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}
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func (a *MedianAbsoluteDeviationAggregation) Format(format string) *MedianAbsoluteDeviationAggregation {
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a.format = format
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return a
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}
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func (a *MedianAbsoluteDeviationAggregation) Missing(missing interface{}) *MedianAbsoluteDeviationAggregation {
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a.missing = missing
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return a
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}
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func (a *MedianAbsoluteDeviationAggregation) SubAggregation(name string, subAggregation Aggregation) *MedianAbsoluteDeviationAggregation {
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a.subAggregations[name] = subAggregation
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return a
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}
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// Meta sets the meta data to be included in the aggregation response.
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func (a *MedianAbsoluteDeviationAggregation) Meta(metaData map[string]interface{}) *MedianAbsoluteDeviationAggregation {
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a.meta = metaData
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return a
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}
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func (a *MedianAbsoluteDeviationAggregation) Source() (interface{}, error) {
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// Example:
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// {
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// "aggs" : {
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// "review_variability" : { "median_absolute_deviation" : { "field" : "rating" } }
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// }
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// }
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// This method returns only the { "median_absolute_deviation" : { "field" : "rating" } } part.
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source := make(map[string]interface{})
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opts := make(map[string]interface{})
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source["median_absolute_deviation"] = opts
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// ValuesSourceAggregationBuilder
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if a.field != "" {
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opts["field"] = a.field
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}
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if v := a.compression; v != nil {
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opts["compression"] = *v
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}
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if a.script != nil {
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src, err := a.script.Source()
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if err != nil {
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return nil, err
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}
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opts["script"] = src
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}
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if a.format != "" {
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opts["format"] = a.format
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}
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if a.missing != nil {
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opts["missing"] = a.missing
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}
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// AggregationBuilder (SubAggregations)
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if len(a.subAggregations) > 0 {
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aggsMap := make(map[string]interface{})
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source["aggregations"] = aggsMap
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for name, aggregate := range a.subAggregations {
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src, err := aggregate.Source()
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if err != nil {
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return nil, err
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}
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aggsMap[name] = src
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}
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}
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// Add Meta data if available
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if len(a.meta) > 0 {
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source["meta"] = a.meta
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}
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return source, nil
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}
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