1 // Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
2 //  This source code is licensed under both the GPLv2 (found in the
3 //  COPYING file in the root directory) and Apache 2.0 License
4 //  (found in the LICENSE.Apache file in the root directory).
5 
6 #ifndef ROCKSDB_LITE
7 
8 #pragma once
9 
10 #include <string>
11 
12 #include "rocksdb/compaction_filter.h"
13 #include "rocksdb/slice.h"
14 
15 namespace ROCKSDB_NAMESPACE {
16 
17 class RemoveEmptyValueCompactionFilter : public CompactionFilter {
18  public:
19     const char* Name() const override;
20     bool Filter(int level,
21         const Slice& key,
22         const Slice& existing_value,
23         std::string* new_value,
24         bool* value_changed) const override;
25 };
26 }  // namespace ROCKSDB_NAMESPACE
27 #endif  // !ROCKSDB_LITE
28