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
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
// 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
import "errors"
// FiltersAggregation defines a multi bucket aggregations where each bucket
// is associated with a filter. Each bucket will collect all documents that
// match its associated filter.
//
// Notice that the caller has to decide whether to add filters by name
// (using FilterWithName) or unnamed filters (using Filter or Filters). One cannot
// use both named and unnamed filters.
//
// For details, see
// https://www.elastic.co/guide/en/elasticsearch/reference/5.2/search-aggregations-bucket-filters-aggregation.html
type FiltersAggregation struct {
unnamedFilters []Query
namedFilters map[string]Query
subAggregations map[string]Aggregation
meta map[string]interface{}
}
// NewFiltersAggregation initializes a new FiltersAggregation.
func NewFiltersAggregation() *FiltersAggregation {
return &FiltersAggregation{
unnamedFilters: make([]Query, 0),
namedFilters: make(map[string]Query),
subAggregations: make(map[string]Aggregation),
}
}
// Filter adds an unnamed filter. Notice that you can
// either use named or unnamed filters, but not both.
func (a *FiltersAggregation) Filter(filter Query) *FiltersAggregation {
a.unnamedFilters = append(a.unnamedFilters, filter)
return a
}
// Filters adds one or more unnamed filters. Notice that you can
// either use named or unnamed filters, but not both.
func (a *FiltersAggregation) Filters(filters ...Query) *FiltersAggregation {
if len(filters) > 0 {
a.unnamedFilters = append(a.unnamedFilters, filters...)
}
return a
}
// FilterWithName adds a filter with a specific name. Notice that you can
// either use named or unnamed filters, but not both.
func (a *FiltersAggregation) FilterWithName(name string, filter Query) *FiltersAggregation {
a.namedFilters[name] = filter
return a
}
// SubAggregation adds a sub-aggregation to this aggregation.
func (a *FiltersAggregation) SubAggregation(name string, subAggregation Aggregation) *FiltersAggregation {
a.subAggregations[name] = subAggregation
return a
}
// Meta sets the meta data to be included in the aggregation response.
func (a *FiltersAggregation) Meta(metaData map[string]interface{}) *FiltersAggregation {
a.meta = metaData
return a
}
// Source returns the a JSON-serializable interface.
// If the aggregation is invalid, an error is returned. This may e.g. happen
// if you mixed named and unnamed filters.
func (a *FiltersAggregation) Source() (interface{}, error) {
// Example:
// {
// "aggs" : {
// "messages" : {
// "filters" : {
// "filters" : {
// "errors" : { "term" : { "body" : "error" }},
// "warnings" : { "term" : { "body" : "warning" }}
// }
// }
// }
// }
// }
// This method returns only the (outer) { "filters" : {} } part.
source := make(map[string]interface{})
filters := make(map[string]interface{})
source["filters"] = filters
if len(a.unnamedFilters) > 0 && len(a.namedFilters) > 0 {
return nil, errors.New("elastic: use either named or unnamed filters with FiltersAggregation but not both")
}
if len(a.unnamedFilters) > 0 {
arr := make([]interface{}, len(a.unnamedFilters))
for i, filter := range a.unnamedFilters {
src, err := filter.Source()
if err != nil {
return nil, err
}
arr[i] = src
}
filters["filters"] = arr
} else {
dict := make(map[string]interface{})
for key, filter := range a.namedFilters {
src, err := filter.Source()
if err != nil {
return nil, err
}
dict[key] = src
}
filters["filters"] = dict
}
// 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
}
|
