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144 lines
4.4 KiB
144 lines
4.4 KiB
// Copyright (c) 2014 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 search
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import (
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"fmt"
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"github.com/blevesearch/bleve/document"
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"github.com/blevesearch/bleve/index"
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)
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type Location struct {
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Pos float64 `json:"pos"`
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Start float64 `json:"start"`
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End float64 `json:"end"`
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ArrayPositions []float64 `json:"array_positions"`
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}
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// SameArrayElement returns true if two locations are point to
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// the same array element
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func (l *Location) SameArrayElement(other *Location) bool {
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if len(l.ArrayPositions) != len(other.ArrayPositions) {
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return false
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}
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for i, elem := range l.ArrayPositions {
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if other.ArrayPositions[i] != elem {
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return false
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}
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}
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return true
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}
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type Locations []*Location
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type TermLocationMap map[string]Locations
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func (t TermLocationMap) AddLocation(term string, location *Location) {
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t[term] = append(t[term], location)
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}
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type FieldTermLocationMap map[string]TermLocationMap
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type FieldFragmentMap map[string][]string
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type DocumentMatch struct {
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Index string `json:"index,omitempty"`
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ID string `json:"id"`
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IndexInternalID index.IndexInternalID `json:"-"`
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Score float64 `json:"score"`
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Expl *Explanation `json:"explanation,omitempty"`
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Locations FieldTermLocationMap `json:"locations,omitempty"`
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Fragments FieldFragmentMap `json:"fragments,omitempty"`
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Sort []string `json:"sort,omitempty"`
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// Fields contains the values for document fields listed in
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// SearchRequest.Fields. Text fields are returned as strings, numeric
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// fields as float64s and date fields as time.RFC3339 formatted strings.
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Fields map[string]interface{} `json:"fields,omitempty"`
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// as we learn field terms, we can cache important ones for later use
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// for example, sorting and building facets need these values
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CachedFieldTerms index.FieldTerms `json:"-"`
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// if we load the document for this hit, remember it so we dont load again
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Document *document.Document `json:"-"`
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// used to maintain natural index order
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HitNumber uint64 `json:"-"`
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}
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func (dm *DocumentMatch) AddFieldValue(name string, value interface{}) {
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if dm.Fields == nil {
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dm.Fields = make(map[string]interface{})
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}
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existingVal, ok := dm.Fields[name]
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if !ok {
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dm.Fields[name] = value
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return
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}
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valSlice, ok := existingVal.([]interface{})
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if ok {
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// already a slice, append to it
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valSlice = append(valSlice, value)
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} else {
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// create a slice
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valSlice = []interface{}{existingVal, value}
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}
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dm.Fields[name] = valSlice
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}
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// Reset allows an already allocated DocumentMatch to be reused
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func (dm *DocumentMatch) Reset() *DocumentMatch {
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// remember the []byte used for the IndexInternalID
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indexInternalID := dm.IndexInternalID
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// remember the []interface{} used for sort
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sort := dm.Sort
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// idiom to copy over from empty DocumentMatch (0 allocations)
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*dm = DocumentMatch{}
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// reuse the []byte already allocated (and reset len to 0)
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dm.IndexInternalID = indexInternalID[:0]
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// reuse the []interface{} already allocated (and reset len to 0)
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dm.Sort = sort[:0]
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return dm
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}
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func (dm *DocumentMatch) String() string {
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return fmt.Sprintf("[%s-%f]", string(dm.IndexInternalID), dm.Score)
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}
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type DocumentMatchCollection []*DocumentMatch
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func (c DocumentMatchCollection) Len() int { return len(c) }
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func (c DocumentMatchCollection) Swap(i, j int) { c[i], c[j] = c[j], c[i] }
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func (c DocumentMatchCollection) Less(i, j int) bool { return c[i].Score > c[j].Score }
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type Searcher interface {
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Next(ctx *SearchContext) (*DocumentMatch, error)
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Advance(ctx *SearchContext, ID index.IndexInternalID) (*DocumentMatch, error)
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Close() error
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Weight() float64
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SetQueryNorm(float64)
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Count() uint64
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Min() int
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DocumentMatchPoolSize() int
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}
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// SearchContext represents the context around a single search
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type SearchContext struct {
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DocumentMatchPool *DocumentMatchPool
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}
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