138 lines
3.8 KiB
Go
138 lines
3.8 KiB
Go
// Copyright (c) 2022 Couchbase, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package query
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import (
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"context"
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"encoding/json"
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"github.com/blevesearch/bleve/v2/geo"
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"github.com/blevesearch/bleve/v2/mapping"
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"github.com/blevesearch/bleve/v2/search"
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"github.com/blevesearch/bleve/v2/search/searcher"
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"github.com/blevesearch/bleve/v2/util"
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index "github.com/blevesearch/bleve_index_api"
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)
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type Geometry struct {
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Shape index.GeoJSON `json:"shape"`
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Relation string `json:"relation"`
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}
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type GeoShapeQuery struct {
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Geometry Geometry `json:"geometry"`
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FieldVal string `json:"field,omitempty"`
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BoostVal *Boost `json:"boost,omitempty"`
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}
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// NewGeoShapeQuery creates a geoshape query for the
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// given shape type. This method can be used for
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// creating geoshape queries for shape types like: point,
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// linestring, polygon, multipoint, multilinestring,
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// multipolygon and envelope.
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func NewGeoShapeQuery(coordinates [][][][]float64, typ,
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relation string) (*GeoShapeQuery, error) {
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s, _, err := geo.NewGeoJsonShape(coordinates, typ)
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if err != nil {
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return nil, err
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}
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return &GeoShapeQuery{Geometry: Geometry{Shape: s,
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Relation: relation}}, nil
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}
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// NewGeoShapeCircleQuery creates a geoshape query for the
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// given center point and the radius. Radius formats supported:
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// "5in" "5inch" "7yd" "7yards" "9ft" "9feet" "11km" "11kilometers"
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// "3nm" "3nauticalmiles" "13mm" "13millimeters" "15cm" "15centimeters"
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// "17mi" "17miles" "19m" "19meters" If the unit cannot be determined,
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// the entire string is parsed and the unit of meters is assumed.
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func NewGeoShapeCircleQuery(coordinates []float64, radius,
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relation string) (*GeoShapeQuery, error) {
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s, _, err := geo.NewGeoCircleShape(coordinates, radius)
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if err != nil {
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return nil, err
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}
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return &GeoShapeQuery{Geometry: Geometry{Shape: s,
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Relation: relation}}, nil
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}
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// NewGeometryCollectionQuery creates a geoshape query for the
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// given geometrycollection coordinates and types.
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func NewGeometryCollectionQuery(coordinates [][][][][]float64, types []string,
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relation string) (*GeoShapeQuery, error) {
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s, _, err := geo.NewGeometryCollection(coordinates, types)
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if err != nil {
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return nil, err
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}
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return &GeoShapeQuery{Geometry: Geometry{Shape: s,
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Relation: relation}}, nil
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}
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func (q *GeoShapeQuery) SetBoost(b float64) {
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boost := Boost(b)
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q.BoostVal = &boost
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}
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func (q *GeoShapeQuery) Boost() float64 {
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return q.BoostVal.Value()
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}
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func (q *GeoShapeQuery) SetField(f string) {
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q.FieldVal = f
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}
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func (q *GeoShapeQuery) Field() string {
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return q.FieldVal
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}
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func (q *GeoShapeQuery) Searcher(ctx context.Context, i index.IndexReader,
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m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
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field := q.FieldVal
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if q.FieldVal == "" {
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field = m.DefaultSearchField()
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}
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ctx = context.WithValue(ctx, search.QueryTypeKey, search.Geo)
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return searcher.NewGeoShapeSearcher(ctx, i, q.Geometry.Shape, q.Geometry.Relation, field,
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q.BoostVal.Value(), options)
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}
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func (q *GeoShapeQuery) Validate() error {
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return nil
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}
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func (q *Geometry) UnmarshalJSON(data []byte) error {
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tmp := struct {
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Shape json.RawMessage `json:"shape"`
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Relation string `json:"relation"`
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}{}
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err := util.UnmarshalJSON(data, &tmp)
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if err != nil {
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return err
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}
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q.Shape, err = geo.ParseGeoJSONShape(tmp.Shape)
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if err != nil {
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return err
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}
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q.Relation = tmp.Relation
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return nil
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}
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