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// Copyright 2012-2015 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
// SignificantSignificantTermsAggregation is an aggregation that returns interesting
// or unusual occurrences of terms in a set.
// See: http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-aggregations-bucket-significantterms-aggregation.html
type SignificantTermsAggregation struct {
field string
subAggregations map[string]Aggregation
minDocCount *int
shardMinDocCount *int
requiredSize *int
shardSize *int
filter Filter
executionHint string
}
func NewSignificantTermsAggregation() SignificantTermsAggregation {
a := SignificantTermsAggregation{
subAggregations: make(map[string]Aggregation, 0),
}
return a
}
func (a SignificantTermsAggregation) Field(field string) SignificantTermsAggregation {
a.field = field
return a
}
func (a SignificantTermsAggregation) SubAggregation(name string, subAggregation Aggregation) SignificantTermsAggregation {
a.subAggregations[name] = subAggregation
return a
}
func (a SignificantTermsAggregation) MinDocCount(minDocCount int) SignificantTermsAggregation {
a.minDocCount = &minDocCount
return a
}
func (a SignificantTermsAggregation) ShardMinDocCount(shardMinDocCount int) SignificantTermsAggregation {
a.shardMinDocCount = &shardMinDocCount
return a
}
func (a SignificantTermsAggregation) RequiredSize(requiredSize int) SignificantTermsAggregation {
a.requiredSize = &requiredSize
return a
}
func (a SignificantTermsAggregation) ShardSize(shardSize int) SignificantTermsAggregation {
a.shardSize = &shardSize
return a
}
func (a SignificantTermsAggregation) BackgroundFilter(filter Filter) SignificantTermsAggregation {
a.filter = filter
return a
}
func (a SignificantTermsAggregation) ExecutionHint(hint string) SignificantTermsAggregation {
a.executionHint = hint
return a
}
func (a SignificantTermsAggregation) Source() interface{} {
// Example:
// {
// "query" : {
// "terms" : {"force" : [ "British Transport Police" ]}
// },
// "aggregations" : {
// "significantCrimeTypes" : {
// "significant_terms" : { "field" : "crime_type" }
// }
// }
// }
//
// This method returns only the
// { "significant_terms" : { "field" : "crime_type" }
// part.
source := make(map[string]interface{})
opts := make(map[string]interface{})
source["significant_terms"] = opts
if a.field != "" {
opts["field"] = a.field
}
if a.requiredSize != nil {
opts["size"] = *a.requiredSize // not a typo!
}
if a.shardSize != nil {
opts["shard_size"] = *a.shardSize
}
if a.minDocCount != nil {
opts["min_doc_count"] = *a.minDocCount
}
if a.shardMinDocCount != nil {
opts["shard_min_doc_count"] = *a.shardMinDocCount
}
if a.filter != nil {
opts["background_filter"] = a.filter.Source()
}
if a.executionHint != "" {
opts["execution_hint"] = a.executionHint
}
// AggregationBuilder (SubAggregations)
if len(a.subAggregations) > 0 {
aggsMap := make(map[string]interface{})
source["aggregations"] = aggsMap
for name, aggregate := range a.subAggregations {
aggsMap[name] = aggregate.Source()
}
}
return source
}
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