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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
// WildcardQuery matches documents that have fields matching a wildcard
// expression (not analyzed). Supported wildcards are *, which matches
// any character sequence (including the empty one), and ?, which matches
// any single character. Note this query can be slow, as it needs to iterate
// over many terms. In order to prevent extremely slow wildcard queries,
// a wildcard term should not start with one of the wildcards * or ?.
// The wildcard query maps to Lucene WildcardQuery.
//
// For more details, see
// https://www.elastic.co/guide/en/elasticsearch/reference/6.0/query-dsl-wildcard-query.html
type WildcardQuery struct {
name string
wildcard string
boost *float64
rewrite string
queryName string
}
// NewWildcardQuery creates and initializes a new WildcardQuery.
func NewWildcardQuery(name, wildcard string) *WildcardQuery {
return &WildcardQuery{
name: name,
wildcard: wildcard,
}
}
// Boost sets the boost for this query.
func (q *WildcardQuery) Boost(boost float64) *WildcardQuery {
q.boost = &boost
return q
}
func (q *WildcardQuery) Rewrite(rewrite string) *WildcardQuery {
q.rewrite = rewrite
return q
}
// QueryName sets the name of this query.
func (q *WildcardQuery) QueryName(queryName string) *WildcardQuery {
q.queryName = queryName
return q
}
// Source returns the JSON serializable body of this query.
func (q *WildcardQuery) Source() (interface{}, error) {
// {
// "wildcard" : {
// "user" : {
// "wildcard" : "ki*y",
// "boost" : 1.0
// }
// }
source := make(map[string]interface{})
query := make(map[string]interface{})
source["wildcard"] = query
wq := make(map[string]interface{})
query[q.name] = wq
wq["wildcard"] = q.wildcard
if q.boost != nil {
wq["boost"] = *q.boost
}
if q.rewrite != "" {
wq["rewrite"] = q.rewrite
}
if q.queryName != "" {
wq["_name"] = q.queryName
}
return source, nil
}
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