110 lines
2.7 KiB
Go
110 lines
2.7 KiB
Go
// Copyright 2012-2015 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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// AvgAggregation is a single-value metrics aggregation that computes
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// the average of numeric values that are extracted from the
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// aggregated documents. These values can be extracted either from
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// specific numeric fields in the documents, or be generated by
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// a provided script.
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// See: http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-aggregations-metrics-avg-aggregation.html
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type AvgAggregation struct {
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field string
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script string
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scriptFile string
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lang string
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format string
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params map[string]interface{}
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subAggregations map[string]Aggregation
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}
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func NewAvgAggregation() AvgAggregation {
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a := AvgAggregation{
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params: make(map[string]interface{}),
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subAggregations: make(map[string]Aggregation),
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}
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return a
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}
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func (a AvgAggregation) Field(field string) AvgAggregation {
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a.field = field
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return a
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}
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func (a AvgAggregation) Script(script string) AvgAggregation {
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a.script = script
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return a
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}
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func (a AvgAggregation) ScriptFile(scriptFile string) AvgAggregation {
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a.scriptFile = scriptFile
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return a
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}
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func (a AvgAggregation) Lang(lang string) AvgAggregation {
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a.lang = lang
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return a
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}
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func (a AvgAggregation) Format(format string) AvgAggregation {
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a.format = format
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return a
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}
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func (a AvgAggregation) Param(name string, value interface{}) AvgAggregation {
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a.params[name] = value
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return a
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}
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func (a AvgAggregation) SubAggregation(name string, subAggregation Aggregation) AvgAggregation {
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a.subAggregations[name] = subAggregation
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return a
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}
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func (a AvgAggregation) Source() interface{} {
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// Example:
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// {
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// "aggs" : {
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// "avg_grade" : { "avg" : { "field" : "grade" } }
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// }
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// }
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// This method returns only the { "avg" : { "field" : "grade" } } part.
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source := make(map[string]interface{})
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opts := make(map[string]interface{})
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source["avg"] = 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 a.script != "" {
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opts["script"] = a.script
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}
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if a.scriptFile != "" {
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opts["script_file"] = a.scriptFile
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}
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if a.lang != "" {
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opts["lang"] = a.lang
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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 len(a.params) > 0 {
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opts["params"] = a.params
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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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aggsMap[name] = aggregate.Source()
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}
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}
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return source
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}
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