145 lines
4.4 KiB
Go
145 lines
4.4 KiB
Go
// Copyright (c) 2014 Couchbase, Inc.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package search
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/blevesearch/bleve/document"
|
|
"github.com/blevesearch/bleve/index"
|
|
)
|
|
|
|
type Location struct {
|
|
Pos float64 `json:"pos"`
|
|
Start float64 `json:"start"`
|
|
End float64 `json:"end"`
|
|
ArrayPositions []float64 `json:"array_positions"`
|
|
}
|
|
|
|
// SameArrayElement returns true if two locations are point to
|
|
// the same array element
|
|
func (l *Location) SameArrayElement(other *Location) bool {
|
|
if len(l.ArrayPositions) != len(other.ArrayPositions) {
|
|
return false
|
|
}
|
|
for i, elem := range l.ArrayPositions {
|
|
if other.ArrayPositions[i] != elem {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
type Locations []*Location
|
|
|
|
type TermLocationMap map[string]Locations
|
|
|
|
func (t TermLocationMap) AddLocation(term string, location *Location) {
|
|
t[term] = append(t[term], location)
|
|
}
|
|
|
|
type FieldTermLocationMap map[string]TermLocationMap
|
|
|
|
type FieldFragmentMap map[string][]string
|
|
|
|
type DocumentMatch struct {
|
|
Index string `json:"index,omitempty"`
|
|
ID string `json:"id"`
|
|
IndexInternalID index.IndexInternalID `json:"-"`
|
|
Score float64 `json:"score"`
|
|
Expl *Explanation `json:"explanation,omitempty"`
|
|
Locations FieldTermLocationMap `json:"locations,omitempty"`
|
|
Fragments FieldFragmentMap `json:"fragments,omitempty"`
|
|
Sort []string `json:"sort,omitempty"`
|
|
|
|
// Fields contains the values for document fields listed in
|
|
// SearchRequest.Fields. Text fields are returned as strings, numeric
|
|
// fields as float64s and date fields as time.RFC3339 formatted strings.
|
|
Fields map[string]interface{} `json:"fields,omitempty"`
|
|
|
|
// as we learn field terms, we can cache important ones for later use
|
|
// for example, sorting and building facets need these values
|
|
CachedFieldTerms index.FieldTerms `json:"-"`
|
|
|
|
// if we load the document for this hit, remember it so we dont load again
|
|
Document *document.Document `json:"-"`
|
|
|
|
// used to maintain natural index order
|
|
HitNumber uint64 `json:"-"`
|
|
}
|
|
|
|
func (dm *DocumentMatch) AddFieldValue(name string, value interface{}) {
|
|
if dm.Fields == nil {
|
|
dm.Fields = make(map[string]interface{})
|
|
}
|
|
existingVal, ok := dm.Fields[name]
|
|
if !ok {
|
|
dm.Fields[name] = value
|
|
return
|
|
}
|
|
|
|
valSlice, ok := existingVal.([]interface{})
|
|
if ok {
|
|
// already a slice, append to it
|
|
valSlice = append(valSlice, value)
|
|
} else {
|
|
// create a slice
|
|
valSlice = []interface{}{existingVal, value}
|
|
}
|
|
dm.Fields[name] = valSlice
|
|
}
|
|
|
|
// Reset allows an already allocated DocumentMatch to be reused
|
|
func (dm *DocumentMatch) Reset() *DocumentMatch {
|
|
// remember the []byte used for the IndexInternalID
|
|
indexInternalID := dm.IndexInternalID
|
|
// remember the []interface{} used for sort
|
|
sort := dm.Sort
|
|
// idiom to copy over from empty DocumentMatch (0 allocations)
|
|
*dm = DocumentMatch{}
|
|
// reuse the []byte already allocated (and reset len to 0)
|
|
dm.IndexInternalID = indexInternalID[:0]
|
|
// reuse the []interface{} already allocated (and reset len to 0)
|
|
dm.Sort = sort[:0]
|
|
return dm
|
|
}
|
|
|
|
func (dm *DocumentMatch) String() string {
|
|
return fmt.Sprintf("[%s-%f]", string(dm.IndexInternalID), dm.Score)
|
|
}
|
|
|
|
type DocumentMatchCollection []*DocumentMatch
|
|
|
|
func (c DocumentMatchCollection) Len() int { return len(c) }
|
|
func (c DocumentMatchCollection) Swap(i, j int) { c[i], c[j] = c[j], c[i] }
|
|
func (c DocumentMatchCollection) Less(i, j int) bool { return c[i].Score > c[j].Score }
|
|
|
|
type Searcher interface {
|
|
Next(ctx *SearchContext) (*DocumentMatch, error)
|
|
Advance(ctx *SearchContext, ID index.IndexInternalID) (*DocumentMatch, error)
|
|
Close() error
|
|
Weight() float64
|
|
SetQueryNorm(float64)
|
|
Count() uint64
|
|
Min() int
|
|
|
|
DocumentMatchPoolSize() int
|
|
}
|
|
|
|
// SearchContext represents the context around a single search
|
|
type SearchContext struct {
|
|
DocumentMatchPool *DocumentMatchPool
|
|
}
|