2017-03-25 01:06:14 +01:00
|
|
|
// Copyright (c) 2017 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 searcher
|
|
|
|
|
|
|
|
import (
|
2018-03-02 02:12:16 +01:00
|
|
|
"reflect"
|
|
|
|
|
2017-03-25 01:06:14 +01:00
|
|
|
"github.com/blevesearch/bleve/index"
|
|
|
|
"github.com/blevesearch/bleve/search"
|
2018-03-02 02:12:16 +01:00
|
|
|
"github.com/blevesearch/bleve/size"
|
2017-03-25 01:06:14 +01:00
|
|
|
)
|
|
|
|
|
2018-03-02 02:12:16 +01:00
|
|
|
var reflectStaticSizeFilteringSearcher int
|
|
|
|
|
|
|
|
func init() {
|
|
|
|
var fs FilteringSearcher
|
|
|
|
reflectStaticSizeFilteringSearcher = int(reflect.TypeOf(fs).Size())
|
|
|
|
}
|
|
|
|
|
2017-03-25 01:06:14 +01:00
|
|
|
// FilterFunc defines a function which can filter documents
|
|
|
|
// returning true means keep the document
|
|
|
|
// returning false means do not keep the document
|
|
|
|
type FilterFunc func(d *search.DocumentMatch) bool
|
|
|
|
|
|
|
|
// FilteringSearcher wraps any other searcher, but checks any Next/Advance
|
|
|
|
// call against the supplied FilterFunc
|
|
|
|
type FilteringSearcher struct {
|
|
|
|
child search.Searcher
|
|
|
|
accept FilterFunc
|
|
|
|
}
|
|
|
|
|
|
|
|
func NewFilteringSearcher(s search.Searcher, filter FilterFunc) *FilteringSearcher {
|
|
|
|
return &FilteringSearcher{
|
|
|
|
child: s,
|
|
|
|
accept: filter,
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2018-03-02 02:12:16 +01:00
|
|
|
func (f *FilteringSearcher) Size() int {
|
|
|
|
return reflectStaticSizeFilteringSearcher + size.SizeOfPtr +
|
|
|
|
f.child.Size()
|
|
|
|
}
|
|
|
|
|
2017-03-25 01:06:14 +01:00
|
|
|
func (f *FilteringSearcher) Next(ctx *search.SearchContext) (*search.DocumentMatch, error) {
|
|
|
|
next, err := f.child.Next(ctx)
|
|
|
|
for next != nil && err == nil {
|
|
|
|
if f.accept(next) {
|
|
|
|
return next, nil
|
|
|
|
}
|
|
|
|
next, err = f.child.Next(ctx)
|
|
|
|
}
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
|
|
|
|
func (f *FilteringSearcher) Advance(ctx *search.SearchContext, ID index.IndexInternalID) (*search.DocumentMatch, error) {
|
|
|
|
adv, err := f.child.Advance(ctx, ID)
|
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
if adv == nil {
|
|
|
|
return nil, nil
|
|
|
|
}
|
|
|
|
if f.accept(adv) {
|
|
|
|
return adv, nil
|
|
|
|
}
|
|
|
|
return f.Next(ctx)
|
|
|
|
}
|
|
|
|
|
|
|
|
func (f *FilteringSearcher) Close() error {
|
|
|
|
return f.child.Close()
|
|
|
|
}
|
|
|
|
|
|
|
|
func (f *FilteringSearcher) Weight() float64 {
|
|
|
|
return f.child.Weight()
|
|
|
|
}
|
|
|
|
|
|
|
|
func (f *FilteringSearcher) SetQueryNorm(n float64) {
|
|
|
|
f.child.SetQueryNorm(n)
|
|
|
|
}
|
|
|
|
|
|
|
|
func (f *FilteringSearcher) Count() uint64 {
|
|
|
|
return f.child.Count()
|
|
|
|
}
|
|
|
|
|
|
|
|
func (f *FilteringSearcher) Min() int {
|
|
|
|
return f.child.Min()
|
|
|
|
}
|
|
|
|
|
|
|
|
func (f *FilteringSearcher) DocumentMatchPoolSize() int {
|
|
|
|
return f.child.DocumentMatchPoolSize()
|
|
|
|
}
|