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See https://www.elastic.co/guide/en/elasticsearch/reference/5.3/search-aggregations-matrix-stats-aggregation.html Close #488
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,120 @@ | ||
| // 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. | ||
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| package elastic | ||
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| // 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{} | ||
| } | ||
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| // NewMatrixStatsAggregation initializes a new MatrixStatsAggregation. | ||
| func NewMatrixStatsAggregation() *MatrixStatsAggregation { | ||
| return &MatrixStatsAggregation{ | ||
| subAggregations: make(map[string]Aggregation), | ||
| } | ||
| } | ||
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| func (a *MatrixStatsAggregation) Fields(fields ...string) *MatrixStatsAggregation { | ||
| a.fields = append(a.fields, fields...) | ||
| return a | ||
| } | ||
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| // Missing configures the value to use when documents miss a value. | ||
| func (a *MatrixStatsAggregation) Missing(missing interface{}) *MatrixStatsAggregation { | ||
| a.missing = missing | ||
| return a | ||
| } | ||
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| // 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 | ||
| } | ||
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| func (a *MatrixStatsAggregation) Format(format string) *MatrixStatsAggregation { | ||
| a.format = format | ||
| return a | ||
| } | ||
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| func (a *MatrixStatsAggregation) ValueType(valueType interface{}) *MatrixStatsAggregation { | ||
| a.valueType = valueType | ||
| return a | ||
| } | ||
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| func (a *MatrixStatsAggregation) SubAggregation(name string, subAggregation Aggregation) *MatrixStatsAggregation { | ||
| a.subAggregations[name] = subAggregation | ||
| return a | ||
| } | ||
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| // 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 | ||
| } | ||
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| // 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. | ||
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| source := make(map[string]interface{}) | ||
| opts := make(map[string]interface{}) | ||
| source["matrix_stats"] = opts | ||
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| // 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 | ||
| } | ||
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| // 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 | ||
| } | ||
| } | ||
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| // Add Meta data if available | ||
| if len(a.meta) > 0 { | ||
| source["meta"] = a.meta | ||
| } | ||
|
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| return source, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| // 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. | ||
|
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| package elastic | ||
|
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| import ( | ||
| "encoding/json" | ||
| "testing" | ||
| ) | ||
|
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| func TestMatrixStatsAggregation(t *testing.T) { | ||
| agg := NewMatrixStatsAggregation(). | ||
| Fields("poverty", "income"). | ||
| Missing(map[string]interface{}{ | ||
| "income": 50000, | ||
| }). | ||
| Mode("avg"). | ||
| Format("0000.0"). | ||
| ValueType("double") | ||
| src, err := agg.Source() | ||
| if err != nil { | ||
| t.Fatal(err) | ||
| } | ||
| data, err := json.Marshal(src) | ||
| if err != nil { | ||
| t.Fatalf("marshaling to JSON failed: %v", err) | ||
| } | ||
| got := string(data) | ||
| expected := `{"matrix_stats":{"fields":["poverty","income"],"format":"0000.0","missing":{"income":50000},"mode":"avg","value_type":"double"}}` | ||
| if got != expected { | ||
| t.Errorf("expected\n%s\n,got:\n%s", expected, got) | ||
| } | ||
| } | ||
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| func TestMatrixStatsAggregationWithMetaData(t *testing.T) { | ||
| agg := NewMatrixStatsAggregation(). | ||
| Fields("poverty", "income"). | ||
| Meta(map[string]interface{}{"name": "Oliver"}) | ||
| src, err := agg.Source() | ||
| if err != nil { | ||
| t.Fatal(err) | ||
| } | ||
| data, err := json.Marshal(src) | ||
| if err != nil { | ||
| t.Fatalf("marshaling to JSON failed: %v", err) | ||
| } | ||
| got := string(data) | ||
| expected := `{"matrix_stats":{"fields":["poverty","income"]},"meta":{"name":"Oliver"}}` | ||
| if got != expected { | ||
| t.Errorf("expected\n%s\n,got:\n%s", expected, got) | ||
| } | ||
| } |
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