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Diffstat (limited to 'vendor/gopkg.in/olivere/elastic.v5/search_queries_boosting.go')
-rw-r--r-- | vendor/gopkg.in/olivere/elastic.v5/search_queries_boosting.go | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/vendor/gopkg.in/olivere/elastic.v5/search_queries_boosting.go b/vendor/gopkg.in/olivere/elastic.v5/search_queries_boosting.go new file mode 100644 index 000000000..3a31237c9 --- /dev/null +++ b/vendor/gopkg.in/olivere/elastic.v5/search_queries_boosting.go @@ -0,0 +1,97 @@ +// 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 + +// A boosting query can be used to effectively +// demote results that match a given query. +// For more details, see: +// https://www.elastic.co/guide/en/elasticsearch/reference/5.2/query-dsl-boosting-query.html +type BoostingQuery struct { + Query + positiveClause Query + negativeClause Query + negativeBoost *float64 + boost *float64 +} + +// Creates a new boosting query. +func NewBoostingQuery() *BoostingQuery { + return &BoostingQuery{} +} + +func (q *BoostingQuery) Positive(positive Query) *BoostingQuery { + q.positiveClause = positive + return q +} + +func (q *BoostingQuery) Negative(negative Query) *BoostingQuery { + q.negativeClause = negative + return q +} + +func (q *BoostingQuery) NegativeBoost(negativeBoost float64) *BoostingQuery { + q.negativeBoost = &negativeBoost + return q +} + +func (q *BoostingQuery) Boost(boost float64) *BoostingQuery { + q.boost = &boost + return q +} + +// Creates the query source for the boosting query. +func (q *BoostingQuery) Source() (interface{}, error) { + // { + // "boosting" : { + // "positive" : { + // "term" : { + // "field1" : "value1" + // } + // }, + // "negative" : { + // "term" : { + // "field2" : "value2" + // } + // }, + // "negative_boost" : 0.2 + // } + // } + + query := make(map[string]interface{}) + + boostingClause := make(map[string]interface{}) + query["boosting"] = boostingClause + + // Negative and positive clause as well as negative boost + // are mandatory in the Java client. + + // positive + if q.positiveClause != nil { + src, err := q.positiveClause.Source() + if err != nil { + return nil, err + } + boostingClause["positive"] = src + } + + // negative + if q.negativeClause != nil { + src, err := q.negativeClause.Source() + if err != nil { + return nil, err + } + boostingClause["negative"] = src + } + + if q.negativeBoost != nil { + boostingClause["negative_boost"] = *q.negativeBoost + } + + if q.boost != nil { + boostingClause["boost"] = *q.boost + } + + return query, nil +} |