Adding upstream version 2.5.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>

index/upsidedown/store/null/null.go

@@ -0,0 +1,121 @@
+//  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 null
+
+import (
+	"github.com/blevesearch/bleve/v2/registry"
+	store "github.com/blevesearch/upsidedown_store_api"
+)
+
+const Name = "null"
+
+type Store struct{}
+
+func New(mo store.MergeOperator, config map[string]interface{}) (store.KVStore, error) {
+	return &Store{}, nil
+}
+
+func (i *Store) Close() error {
+	return nil
+}
+
+func (i *Store) Reader() (store.KVReader, error) {
+	return &reader{}, nil
+}
+
+func (i *Store) Writer() (store.KVWriter, error) {
+	return &writer{}, nil
+}
+
+type reader struct{}
+
+func (r *reader) Get(key []byte) ([]byte, error) {
+	return nil, nil
+}
+
+func (r *reader) MultiGet(keys [][]byte) ([][]byte, error) {
+	return make([][]byte, len(keys)), nil
+}
+
+func (r *reader) PrefixIterator(prefix []byte) store.KVIterator {
+	return &iterator{}
+}
+
+func (r *reader) RangeIterator(start, end []byte) store.KVIterator {
+	return &iterator{}
+}
+
+func (r *reader) Close() error {
+	return nil
+}
+
+type iterator struct{}
+
+func (i *iterator) SeekFirst()    {}
+func (i *iterator) Seek(k []byte) {}
+func (i *iterator) Next()         {}
+
+func (i *iterator) Current() ([]byte, []byte, bool) {
+	return nil, nil, false
+}
+
+func (i *iterator) Key() []byte {
+	return nil
+}
+
+func (i *iterator) Value() []byte {
+	return nil
+}
+
+func (i *iterator) Valid() bool {
+	return false
+}
+
+func (i *iterator) Close() error {
+	return nil
+}
+
+type batch struct{}
+
+func (i *batch) Set(key, val []byte)   {}
+func (i *batch) Delete(key []byte)     {}
+func (i *batch) Merge(key, val []byte) {}
+func (i *batch) Reset()                {}
+func (i *batch) Close() error          { return nil }
+
+type writer struct{}
+
+func (w *writer) NewBatch() store.KVBatch {
+	return &batch{}
+}
+
+func (w *writer) NewBatchEx(options store.KVBatchOptions) ([]byte, store.KVBatch, error) {
+	return make([]byte, options.TotalBytes), w.NewBatch(), nil
+}
+
+func (w *writer) ExecuteBatch(store.KVBatch) error {
+	return nil
+}
+
+func (w *writer) Close() error {
+	return nil
+}
+
+func init() {
+	err := registry.RegisterKVStore(Name, New)
+	if err != nil {
+		panic(err)
+	}
+}