//  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"
)

type Batch struct {
	store *Store
	merge *store.EmulatedMerge
	batch *leveldb.Batch
}

func (b *Batch) Set(key, val []byte) {
	b.batch.Put(key, val)
}

func (b *Batch) Delete(key []byte) {
	b.batch.Delete(key)
}

func (b *Batch) Merge(key, val []byte) {
	b.merge.Merge(key, val)
}

func (b *Batch) Reset() {
	b.batch.Reset()
	b.merge = store.NewEmulatedMerge(b.store.mo)
}

func (b *Batch) Close() error {
	b.batch.Reset()
	b.batch = nil
	b.merge = nil
	return nil
}