a265218f76
Boostable, Fieldable, Validatable broken out into separate interfaces. This allows them to be discoverable when needed, but ignorable otherwise. The top-level bleve package only every cares about Validatable and even that is optional. Also, this change goes further to make the structure names more reasonable, for cases where you're directly interacting with the structures.
124 lines
3.7 KiB
Go
124 lines
3.7 KiB
Go
// Copyright (c) 2014 Couchbase, Inc.
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
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// except in compliance with the License. You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software distributed under the
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// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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// either express or implied. See the License for the specific language governing permissions
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// and limitations under the License.
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package query
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import (
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"fmt"
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"math"
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"github.com/blevesearch/bleve/analysis/datetime_parsers/datetime_optional"
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"github.com/blevesearch/bleve/index"
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"github.com/blevesearch/bleve/mapping"
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"github.com/blevesearch/bleve/numeric_util"
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"github.com/blevesearch/bleve/registry"
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"github.com/blevesearch/bleve/search"
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"github.com/blevesearch/bleve/search/searchers"
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)
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// QueryDateTimeParser controls the default query date time parser
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var QueryDateTimeParser = datetime_optional.Name
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var cache = registry.NewCache()
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type DateRangeQuery struct {
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Start *string `json:"start,omitempty"`
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End *string `json:"end,omitempty"`
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InclusiveStart *bool `json:"inclusive_start,omitempty"`
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InclusiveEnd *bool `json:"inclusive_end,omitempty"`
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Field string `json:"field,omitempty"`
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Boost *Boost `json:"boost,omitempty"`
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}
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// NewDateRangeQuery creates a new Query for ranges
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// of date values.
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// Date strings are parsed using the DateTimeParser configured in the
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// top-level config.QueryDateTimeParser
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// Either, but not both endpoints can be nil.
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func NewDateRangeQuery(start, end *string) *DateRangeQuery {
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return NewDateRangeInclusiveQuery(start, end, nil, nil)
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}
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// NewDateRangeInclusiveQuery creates a new Query for ranges
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// of date values.
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// Date strings are parsed using the DateTimeParser configured in the
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// top-level config.QueryDateTimeParser
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// Either, but not both endpoints can be nil.
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// startInclusive and endInclusive control inclusion of the endpoints.
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func NewDateRangeInclusiveQuery(start, end *string, startInclusive, endInclusive *bool) *DateRangeQuery {
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return &DateRangeQuery{
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Start: start,
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End: end,
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InclusiveStart: startInclusive,
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InclusiveEnd: endInclusive,
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}
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}
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func (q *DateRangeQuery) SetBoost(b float64) {
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boost := Boost(b)
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q.Boost = &boost
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}
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func (q *DateRangeQuery) SetField(f string) {
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q.Field = f
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}
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func (q *DateRangeQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
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min, max, err := q.parseEndpoints()
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if err != nil {
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return nil, err
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}
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field := q.Field
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if q.Field == "" {
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field = m.DefaultSearchField()
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}
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return searchers.NewNumericRangeSearcher(i, min, max, q.InclusiveStart, q.InclusiveEnd, field, q.Boost.Value(), explain)
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}
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func (q *DateRangeQuery) parseEndpoints() (*float64, *float64, error) {
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dateTimeParser, err := cache.DateTimeParserNamed(QueryDateTimeParser)
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if err != nil {
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return nil, nil, err
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}
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// now parse the endpoints
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min := math.Inf(-1)
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max := math.Inf(1)
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if q.Start != nil && *q.Start != "" {
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startTime, err := dateTimeParser.ParseDateTime(*q.Start)
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if err != nil {
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return nil, nil, err
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}
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min = numeric_util.Int64ToFloat64(startTime.UnixNano())
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}
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if q.End != nil && *q.End != "" {
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endTime, err := dateTimeParser.ParseDateTime(*q.End)
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if err != nil {
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return nil, nil, err
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}
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max = numeric_util.Int64ToFloat64(endTime.UnixNano())
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}
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return &min, &max, nil
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}
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func (q *DateRangeQuery) Validate() error {
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if q.Start == nil && q.Start == q.End {
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return fmt.Errorf("must specify start or end")
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}
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_, _, err := q.parseEndpoints()
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if err != nil {
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return err
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}
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return nil
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}
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