File: search_aggs_bucket_filter.go

package info (click to toggle)
golang-gopkg-olivere-elastic.v5 5.0.83-1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, sid
  • size: 2,848 kB
  • sloc: makefile: 18; sh: 2
file content (77 lines) | stat: -rw-r--r-- 2,125 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
// 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

// FilterAggregation defines a single bucket of all the documents
// in the current document set context that match a specified filter.
// Often this will be used to narrow down the current aggregation context
// to a specific set of documents.
// See: https://www.elastic.co/guide/en/elasticsearch/reference/5.2/search-aggregations-bucket-filter-aggregation.html
type FilterAggregation struct {
	filter          Query
	subAggregations map[string]Aggregation
	meta            map[string]interface{}
}

func NewFilterAggregation() *FilterAggregation {
	return &FilterAggregation{
		subAggregations: make(map[string]Aggregation),
	}
}

func (a *FilterAggregation) SubAggregation(name string, subAggregation Aggregation) *FilterAggregation {
	a.subAggregations[name] = subAggregation
	return a
}

// Meta sets the meta data to be included in the aggregation response.
func (a *FilterAggregation) Meta(metaData map[string]interface{}) *FilterAggregation {
	a.meta = metaData
	return a
}

func (a *FilterAggregation) Filter(filter Query) *FilterAggregation {
	a.filter = filter
	return a
}

func (a *FilterAggregation) Source() (interface{}, error) {
	// Example:
	//	{
	//    "aggs" : {
	//         "in_stock_products" : {
	//             "filter" : { "range" : { "stock" : { "gt" : 0 } } }
	//         }
	//    }
	//	}
	// This method returns only the { "filter" : {} } part.

	src, err := a.filter.Source()
	if err != nil {
		return nil, err
	}
	source := make(map[string]interface{})
	source["filter"] = src

	// AggregationBuilder (SubAggregations)
	if len(a.subAggregations) > 0 {
		aggsMap := make(map[string]interface{})
		source["aggregations"] = aggsMap
		for name, aggregate := range a.subAggregations {
			src, err := aggregate.Source()
			if err != nil {
				return nil, err
			}
			aggsMap[name] = src
		}
	}

	// Add Meta data if available
	if len(a.meta) > 0 {
		source["meta"] = a.meta
	}

	return source, nil
}