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// 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 goleveldb
import (
"github.com/blevesearch/bleve/index/store"
"github.com/syndtr/goleveldb/leveldb"
"github.com/syndtr/goleveldb/leveldb/util"
)
type Reader struct {
store *Store
snapshot *leveldb.Snapshot
}
func (r *Reader) Get(key []byte) ([]byte, error) {
b, err := r.snapshot.Get(key, r.store.defaultReadOptions)
if err == leveldb.ErrNotFound {
return nil, nil
}
return b, err
}
func (r *Reader) MultiGet(keys [][]byte) ([][]byte, error) {
return store.MultiGet(r, keys)
}
func (r *Reader) PrefixIterator(prefix []byte) store.KVIterator {
byteRange := util.BytesPrefix(prefix)
iter := r.snapshot.NewIterator(byteRange, r.store.defaultReadOptions)
iter.First()
rv := Iterator{
store: r.store,
iterator: iter,
}
return &rv
}
func (r *Reader) RangeIterator(start, end []byte) store.KVIterator {
byteRange := &util.Range{
Start: start,
Limit: end,
}
iter := r.snapshot.NewIterator(byteRange, r.store.defaultReadOptions)
iter.First()
rv := Iterator{
store: r.store,
iterator: iter,
}
return &rv
}
func (r *Reader) Close() error {
r.snapshot.Release()
return nil
}
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