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Diffstat (limited to 'vendor/gopkg.in/olivere/elastic.v5/search_aggs_bucket_sampler.go')
-rw-r--r-- | vendor/gopkg.in/olivere/elastic.v5/search_aggs_bucket_sampler.go | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/vendor/gopkg.in/olivere/elastic.v5/search_aggs_bucket_sampler.go b/vendor/gopkg.in/olivere/elastic.v5/search_aggs_bucket_sampler.go new file mode 100644 index 000000000..c1a1ab4f7 --- /dev/null +++ b/vendor/gopkg.in/olivere/elastic.v5/search_aggs_bucket_sampler.go @@ -0,0 +1,111 @@ +// 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 + +// SamplerAggregation is a filtering aggregation used to limit any +// sub aggregations' processing to a sample of the top-scoring documents. +// Optionally, diversity settings can be used to limit the number of matches +// that share a common value such as an "author". +// +// See: https://www.elastic.co/guide/en/elasticsearch/reference/5.2/search-aggregations-bucket-sampler-aggregation.html +type SamplerAggregation struct { + subAggregations map[string]Aggregation + meta map[string]interface{} + + shardSize int + maxDocsPerValue int + executionHint string +} + +func NewSamplerAggregation() *SamplerAggregation { + return &SamplerAggregation{ + shardSize: -1, + maxDocsPerValue: -1, + subAggregations: make(map[string]Aggregation), + } +} + +func (a *SamplerAggregation) SubAggregation(name string, subAggregation Aggregation) *SamplerAggregation { + a.subAggregations[name] = subAggregation + return a +} + +// Meta sets the meta data to be included in the aggregation response. +func (a *SamplerAggregation) Meta(metaData map[string]interface{}) *SamplerAggregation { + a.meta = metaData + return a +} + +// ShardSize sets the maximum number of docs returned from each shard. +func (a *SamplerAggregation) ShardSize(shardSize int) *SamplerAggregation { + a.shardSize = shardSize + return a +} + +func (a *SamplerAggregation) MaxDocsPerValue(maxDocsPerValue int) *SamplerAggregation { + a.maxDocsPerValue = maxDocsPerValue + return a +} + +func (a *SamplerAggregation) ExecutionHint(hint string) *SamplerAggregation { + a.executionHint = hint + return a +} + +func (a *SamplerAggregation) Source() (interface{}, error) { + // Example: + // { + // "aggs" : { + // "sample" : { + // "sampler" : { + // "shard_size" : 200 + // }, + // "aggs": { + // "keywords": { + // "significant_terms": { + // "field": "text" + // } + // } + // } + // } + // } + // } + // + // This method returns only the { "sampler" : { ... } } part. + + source := make(map[string]interface{}) + opts := make(map[string]interface{}) + source["sampler"] = opts + + if a.shardSize >= 0 { + opts["shard_size"] = a.shardSize + } + if a.maxDocsPerValue >= 0 { + opts["max_docs_per_value"] = a.maxDocsPerValue + } + if a.executionHint != "" { + opts["execution_hint"] = a.executionHint + } + + // 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 +} |