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bool_query.go
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bool_query.go
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// The MIT License (MIT)
// Copyright (c) 2017-2020 Uber Technologies Inc.
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package query
type Query interface {
// Source returns the JSON-serializable query request.
Source() (interface{}, error)
}
type BoolQuery struct {
mustClauses []Query
mustNotClauses []Query
filterClauses []Query
}
// Creates a new bool query.
func NewBoolQuery() *BoolQuery {
return &BoolQuery{
mustClauses: make([]Query, 0),
mustNotClauses: make([]Query, 0),
filterClauses: make([]Query, 0),
}
}
func (q *BoolQuery) Must(queries ...Query) *BoolQuery {
q.mustClauses = append(q.mustClauses, queries...)
return q
}
func (q *BoolQuery) MustNot(queries ...Query) *BoolQuery {
q.mustNotClauses = append(q.mustNotClauses, queries...)
return q
}
func (q *BoolQuery) Filter(filters ...Query) *BoolQuery {
q.filterClauses = append(q.filterClauses, filters...)
return q
}
func (q *BoolQuery) Source() (interface{}, error) {
query := make(map[string]interface{})
boolClause := make(map[string]interface{})
query["bool"] = boolClause
// must
if len(q.mustClauses) == 1 {
src, err := q.mustClauses[0].Source()
if err != nil {
return nil, err
}
boolClause["must"] = src
} else if len(q.mustClauses) > 1 {
var clauses []interface{}
for _, subQuery := range q.mustClauses {
src, err := subQuery.Source()
if err != nil {
return nil, err
}
clauses = append(clauses, src)
}
boolClause["must"] = clauses
}
// must_not
if len(q.mustNotClauses) == 1 {
src, err := q.mustNotClauses[0].Source()
if err != nil {
return nil, err
}
boolClause["must_not"] = src
} else if len(q.mustNotClauses) > 1 {
var clauses []interface{}
for _, subQuery := range q.mustNotClauses {
src, err := subQuery.Source()
if err != nil {
return nil, err
}
clauses = append(clauses, src)
}
boolClause["must_not"] = clauses
}
// filter
if len(q.filterClauses) == 1 {
src, err := q.filterClauses[0].Source()
if err != nil {
return nil, err
}
boolClause["filter"] = src
} else if len(q.filterClauses) > 1 {
var clauses []interface{}
for _, subQuery := range q.filterClauses {
src, err := subQuery.Source()
if err != nil {
return nil, err
}
clauses = append(clauses, src)
}
boolClause["filter"] = clauses
}
return query, nil
}