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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
// TopHitsAggregation keeps track of the most relevant document
// being aggregated. This aggregator is intended to be used as a
// sub aggregator, so that the top matching documents
// can be aggregated per bucket.
//
// It can effectively be used to group result sets by certain fields via
// a bucket aggregator. One or more bucket aggregators determines by
// which properties a result set get sliced into.
//
// See: https://www.elastic.co/guide/en/elasticsearch/reference/6.0/search-aggregations-metrics-top-hits-aggregation.html
type TopHitsAggregation struct {
searchSource *SearchSource
}
func NewTopHitsAggregation() *TopHitsAggregation {
return &TopHitsAggregation{
searchSource: NewSearchSource(),
}
}
func (a *TopHitsAggregation) From(from int) *TopHitsAggregation {
a.searchSource = a.searchSource.From(from)
return a
}
func (a *TopHitsAggregation) Size(size int) *TopHitsAggregation {
a.searchSource = a.searchSource.Size(size)
return a
}
func (a *TopHitsAggregation) TrackScores(trackScores bool) *TopHitsAggregation {
a.searchSource = a.searchSource.TrackScores(trackScores)
return a
}
func (a *TopHitsAggregation) Explain(explain bool) *TopHitsAggregation {
a.searchSource = a.searchSource.Explain(explain)
return a
}
func (a *TopHitsAggregation) Version(version bool) *TopHitsAggregation {
a.searchSource = a.searchSource.Version(version)
return a
}
func (a *TopHitsAggregation) NoStoredFields() *TopHitsAggregation {
a.searchSource = a.searchSource.NoStoredFields()
return a
}
func (a *TopHitsAggregation) FetchSource(fetchSource bool) *TopHitsAggregation {
a.searchSource = a.searchSource.FetchSource(fetchSource)
return a
}
func (a *TopHitsAggregation) FetchSourceContext(fetchSourceContext *FetchSourceContext) *TopHitsAggregation {
a.searchSource = a.searchSource.FetchSourceContext(fetchSourceContext)
return a
}
func (a *TopHitsAggregation) DocvalueFields(docvalueFields ...string) *TopHitsAggregation {
a.searchSource = a.searchSource.DocvalueFields(docvalueFields...)
return a
}
func (a *TopHitsAggregation) DocvalueField(docvalueField string) *TopHitsAggregation {
a.searchSource = a.searchSource.DocvalueField(docvalueField)
return a
}
func (a *TopHitsAggregation) ScriptFields(scriptFields ...*ScriptField) *TopHitsAggregation {
a.searchSource = a.searchSource.ScriptFields(scriptFields...)
return a
}
func (a *TopHitsAggregation) ScriptField(scriptField *ScriptField) *TopHitsAggregation {
a.searchSource = a.searchSource.ScriptField(scriptField)
return a
}
func (a *TopHitsAggregation) Sort(field string, ascending bool) *TopHitsAggregation {
a.searchSource = a.searchSource.Sort(field, ascending)
return a
}
func (a *TopHitsAggregation) SortWithInfo(info SortInfo) *TopHitsAggregation {
a.searchSource = a.searchSource.SortWithInfo(info)
return a
}
func (a *TopHitsAggregation) SortBy(sorter ...Sorter) *TopHitsAggregation {
a.searchSource = a.searchSource.SortBy(sorter...)
return a
}
func (a *TopHitsAggregation) Highlight(highlight *Highlight) *TopHitsAggregation {
a.searchSource = a.searchSource.Highlight(highlight)
return a
}
func (a *TopHitsAggregation) Highlighter() *Highlight {
return a.searchSource.Highlighter()
}
func (a *TopHitsAggregation) Source() (interface{}, error) {
// Example:
// {
// "aggs": {
// "top_tag_hits": {
// "top_hits": {
// "sort": [
// {
// "last_activity_date": {
// "order": "desc"
// }
// }
// ],
// "_source": {
// "include": [
// "title"
// ]
// },
// "size" : 1
// }
// }
// }
// }
// This method returns only the { "top_hits" : { ... } } part.
source := make(map[string]interface{})
src, err := a.searchSource.Source()
if err != nil {
return nil, err
}
source["top_hits"] = src
return source, nil
}
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