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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
// MatrixMatrixStatsAggregation ...
// See https://www.elastic.co/guide/en/elasticsearch/reference/5.3/search-aggregations-metrics-stats-aggregation.html
// for details.
type MatrixStatsAggregation struct {
fields []string
missing interface{}
format string
valueType interface{}
mode string
subAggregations map[string]Aggregation
meta map[string]interface{}
}
// NewMatrixStatsAggregation initializes a new MatrixStatsAggregation.
func NewMatrixStatsAggregation() *MatrixStatsAggregation {
return &MatrixStatsAggregation{
subAggregations: make(map[string]Aggregation),
}
}
func (a *MatrixStatsAggregation) Fields(fields ...string) *MatrixStatsAggregation {
a.fields = append(a.fields, fields...)
return a
}
// Missing configures the value to use when documents miss a value.
func (a *MatrixStatsAggregation) Missing(missing interface{}) *MatrixStatsAggregation {
a.missing = missing
return a
}
// Mode specifies how to operate. Valid values are: sum, avg, median, min, or max.
func (a *MatrixStatsAggregation) Mode(mode string) *MatrixStatsAggregation {
a.mode = mode
return a
}
func (a *MatrixStatsAggregation) Format(format string) *MatrixStatsAggregation {
a.format = format
return a
}
func (a *MatrixStatsAggregation) ValueType(valueType interface{}) *MatrixStatsAggregation {
a.valueType = valueType
return a
}
func (a *MatrixStatsAggregation) SubAggregation(name string, subAggregation Aggregation) *MatrixStatsAggregation {
a.subAggregations[name] = subAggregation
return a
}
// Meta sets the meta data to be included in the aggregation response.
func (a *MatrixStatsAggregation) Meta(metaData map[string]interface{}) *MatrixStatsAggregation {
a.meta = metaData
return a
}
// Source returns the JSON to serialize into the request, or an error.
func (a *MatrixStatsAggregation) Source() (interface{}, error) {
// Example:
// {
// "aggs" : {
// "matrixstats" : {
// "matrix_stats" : {
// "fields" : ["poverty", "income"],
// "missing": {"income": 50000},
// "mode": "avg",
// ...
// }
// }
// }
// }
// This method returns only the { "matrix_stats" : { ... } } part.
source := make(map[string]interface{})
opts := make(map[string]interface{})
source["matrix_stats"] = opts
// MatrixStatsAggregationBuilder
opts["fields"] = a.fields
if a.missing != nil {
opts["missing"] = a.missing
}
if a.format != "" {
opts["format"] = a.format
}
if a.valueType != nil {
opts["value_type"] = a.valueType
}
if a.mode != "" {
opts["mode"] = a.mode
}
// 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
}
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