182 lines
3.3 KiB
Go
182 lines
3.3 KiB
Go
![]() |
// Copyright (c) 2014 Couchbase, Inc.
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
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// except in compliance with the License. You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software distributed under the
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// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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// either express or implied. See the License for the specific language governing permissions
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// and limitations under the License.
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package null
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import (
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"github.com/blevesearch/bleve/index/store"
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)
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type Store struct{}
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func Open() (*Store, error) {
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rv := Store{}
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return &rv, nil
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}
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func (i *Store) Close() error {
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return nil
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}
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func (i *Store) iterator(key []byte) store.KVIterator {
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rv := newIterator(i)
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return rv
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}
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func (i *Store) Reader() store.KVReader {
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return newReader(i)
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}
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func (i *Store) Writer() store.KVWriter {
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return newWriter(i)
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}
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func (i *Store) newBatch() store.KVBatch {
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return newBatch(i)
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}
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type Reader struct {
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store *Store
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}
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func newReader(store *Store) *Reader {
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return &Reader{
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store: store,
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}
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}
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func (r *Reader) Get(key []byte) ([]byte, error) {
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return nil, nil
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}
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func (r *Reader) Iterator(key []byte) store.KVIterator {
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return r.store.iterator(key)
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}
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func (r *Reader) Close() error {
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return nil
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}
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type Iterator struct {
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store *Store
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}
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func newIterator(store *Store) *Iterator {
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rv := Iterator{
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store: store,
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}
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return &rv
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}
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func (i *Iterator) SeekFirst() {}
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func (i *Iterator) Seek(k []byte) {}
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func (i *Iterator) Next() {}
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func (i *Iterator) Current() ([]byte, []byte, bool) {
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return nil, nil, false
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}
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func (i *Iterator) Key() []byte {
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return nil
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}
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func (i *Iterator) Value() []byte {
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return nil
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}
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func (i *Iterator) Valid() bool {
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return false
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}
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func (i *Iterator) Close() {
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}
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type Batch struct {
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store *Store
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keys [][]byte
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vals [][]byte
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merges map[string]store.AssociativeMergeChain
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}
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func newBatch(s *Store) *Batch {
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rv := Batch{
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store: s,
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keys: make([][]byte, 0),
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vals: make([][]byte, 0),
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merges: make(map[string]store.AssociativeMergeChain),
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}
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return &rv
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}
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func (i *Batch) Set(key, val []byte) {
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i.keys = append(i.keys, key)
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i.vals = append(i.vals, val)
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}
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func (i *Batch) Delete(key []byte) {
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i.keys = append(i.keys, key)
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i.vals = append(i.vals, nil)
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}
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func (i *Batch) Merge(key []byte, oper store.AssociativeMerge) {
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opers, ok := i.merges[string(key)]
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if !ok {
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opers = make(store.AssociativeMergeChain, 0, 1)
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}
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opers = append(opers, oper)
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i.merges[string(key)] = opers
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}
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func (i *Batch) Execute() error {
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return nil
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}
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func (i *Batch) Close() error {
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return nil
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}
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type Writer struct {
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store *Store
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}
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func newWriter(store *Store) *Writer {
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return &Writer{
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store: store,
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}
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}
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func (w *Writer) Set(key, val []byte) error {
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return nil
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}
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func (w *Writer) Delete(key []byte) error {
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return nil
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}
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func (w *Writer) NewBatch() store.KVBatch {
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return newBatch(w.store)
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}
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func (w *Writer) Close() error {
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return nil
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}
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// these two methods can safely read using the regular
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// methods without a read transaction, because we know
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// that no one else is writing but us
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func (w *Writer) Get(key []byte) ([]byte, error) {
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return nil, nil
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}
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func (w *Writer) Iterator(key []byte) store.KVIterator {
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return w.store.iterator(key)
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}
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