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// Copyright 2012-2015 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
// http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-wildcard-query.html.
type WildcardQuery struct {
Query
name string
wildcard string
boost float32
rewrite string
queryName string
}
// NewWildcardQuery creates a new wildcard query.
func NewWildcardQuery(name, wildcard string) WildcardQuery {
q := WildcardQuery{
name: name,
wildcard: wildcard,
boost: -1.0,
}
return q
}
// Name is the name of the field name.
func (q WildcardQuery) Name(name string) WildcardQuery {
q.name = name
return q
}
// Wildcard is the wildcard to be used in the query, e.g. ki*y??.
func (q WildcardQuery) Wildcard(wildcard string) WildcardQuery {
q.wildcard = wildcard
return q
}
// Boost sets the boost for this query.
func (q WildcardQuery) Boost(boost float32) WildcardQuery {
q.boost = boost
return q
}
// Rewrite controls the rewriting.
// See http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-multi-term-rewrite.html
// for details.
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{} {
// {
// "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 != -1.0 {
wq["boost"] = q.boost
}
if q.rewrite != "" {
wq["rewrite"] = q.rewrite
}
if q.queryName != "" {
wq["_name"] = q.queryName
}
return source
}
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