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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
// GlobalAggregation defines a single bucket of all the documents within
// the search execution context. This context is defined by the indices
// and the document types you’re searching on, but is not influenced
// by the search query itself.
// See: http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-aggregations-bucket-global-aggregation.html
type GlobalAggregation struct {
subAggregations map[string]Aggregation
}
func NewGlobalAggregation() GlobalAggregation {
a := GlobalAggregation{
subAggregations: make(map[string]Aggregation),
}
return a
}
func (a GlobalAggregation) SubAggregation(name string, subAggregation Aggregation) GlobalAggregation {
a.subAggregations[name] = subAggregation
return a
}
func (a GlobalAggregation) Source() interface{} {
// Example:
// {
// "aggs" : {
// "all_products" : {
// "global" : {},
// "aggs" : {
// "avg_price" : { "avg" : { "field" : "price" } }
// }
// }
// }
// }
// This method returns only the { "global" : {} } part.
source := make(map[string]interface{})
opts := make(map[string]interface{})
source["global"] = opts
// 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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