mirror of
https://github.com/go-gitea/gitea
synced 2024-11-16 07:04:25 +00:00
79 lines
2.2 KiB
Go
79 lines
2.2 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 upsidedown
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/blevesearch/bleve/index"
|
|
"github.com/blevesearch/bleve/index/store"
|
|
)
|
|
|
|
type UpsideDownCouchFieldDict struct {
|
|
indexReader *IndexReader
|
|
iterator store.KVIterator
|
|
dictRow *DictionaryRow
|
|
dictEntry *index.DictEntry
|
|
field uint16
|
|
}
|
|
|
|
func newUpsideDownCouchFieldDict(indexReader *IndexReader, field uint16, startTerm, endTerm []byte) (*UpsideDownCouchFieldDict, error) {
|
|
|
|
startKey := NewDictionaryRow(startTerm, field, 0).Key()
|
|
if endTerm == nil {
|
|
endTerm = []byte{ByteSeparator}
|
|
} else {
|
|
endTerm = incrementBytes(endTerm)
|
|
}
|
|
endKey := NewDictionaryRow(endTerm, field, 0).Key()
|
|
|
|
it := indexReader.kvreader.RangeIterator(startKey, endKey)
|
|
|
|
return &UpsideDownCouchFieldDict{
|
|
indexReader: indexReader,
|
|
iterator: it,
|
|
dictRow: &DictionaryRow{}, // Pre-alloced, reused row.
|
|
dictEntry: &index.DictEntry{}, // Pre-alloced, reused entry.
|
|
field: field,
|
|
}, nil
|
|
|
|
}
|
|
|
|
func (r *UpsideDownCouchFieldDict) Next() (*index.DictEntry, error) {
|
|
key, val, valid := r.iterator.Current()
|
|
if !valid {
|
|
return nil, nil
|
|
}
|
|
|
|
err := r.dictRow.parseDictionaryK(key)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("unexpected error parsing dictionary row key: %v", err)
|
|
}
|
|
err = r.dictRow.parseDictionaryV(val)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("unexpected error parsing dictionary row val: %v", err)
|
|
}
|
|
r.dictEntry.Term = string(r.dictRow.term)
|
|
r.dictEntry.Count = r.dictRow.count
|
|
// advance the iterator to the next term
|
|
r.iterator.Next()
|
|
return r.dictEntry, nil
|
|
|
|
}
|
|
|
|
func (r *UpsideDownCouchFieldDict) Close() error {
|
|
return r.iterator.Close()
|
|
}
|