// 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 }