- // 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 searcher
-
- import (
- "github.com/blevesearch/bleve/index"
- "github.com/blevesearch/bleve/search"
- )
-
- func NewTermPrefixSearcher(indexReader index.IndexReader, prefix string,
- field string, boost float64, options search.SearcherOptions) (
- search.Searcher, error) {
- // find the terms with this prefix
- fieldDict, err := indexReader.FieldDictPrefix(field, []byte(prefix))
- if err != nil {
- return nil, err
- }
- defer func() {
- if cerr := fieldDict.Close(); cerr != nil && err == nil {
- err = cerr
- }
- }()
-
- var terms []string
- tfd, err := fieldDict.Next()
- for err == nil && tfd != nil {
- terms = append(terms, tfd.Term)
- if tooManyClauses(len(terms)) {
- return nil, tooManyClausesErr(field, len(terms))
- }
- tfd, err = fieldDict.Next()
- }
- if err != nil {
- return nil, err
- }
-
- return NewMultiTermSearcher(indexReader, terms, field, boost, options, true)
- }
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