1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef EXTENSIONS_BROWSER_API_STORAGE_WEAK_UNLIMITED_SETTINGS_STORAGE_H_
6#define EXTENSIONS_BROWSER_API_STORAGE_WEAK_UNLIMITED_SETTINGS_STORAGE_H_
7
8#include "base/compiler_specific.h"
9#include "extensions/browser/value_store/value_store.h"
10
11namespace extensions {
12
13// A ValueStore decorator which makes calls through |Set| ignore quota.
14// "Weak" because ownership of the delegate isn't taken; this is designed to be
15// temporarily attached to storage areas.
16class WeakUnlimitedSettingsStorage : public ValueStore {
17 public:
18  // Ownership of |delegate| NOT taken.
19  explicit WeakUnlimitedSettingsStorage(ValueStore* delegate);
20
21  virtual ~WeakUnlimitedSettingsStorage();
22
23  // ValueStore implementation.
24  virtual size_t GetBytesInUse(const std::string& key) OVERRIDE;
25  virtual size_t GetBytesInUse(const std::vector<std::string>& keys) OVERRIDE;
26  virtual size_t GetBytesInUse() OVERRIDE;
27  virtual ReadResult Get(const std::string& key) OVERRIDE;
28  virtual ReadResult Get(const std::vector<std::string>& keys) OVERRIDE;
29  virtual ReadResult Get() OVERRIDE;
30  virtual WriteResult Set(
31      WriteOptions options,
32      const std::string& key,
33      const base::Value& value) OVERRIDE;
34  virtual WriteResult Set(
35      WriteOptions options, const base::DictionaryValue& values) OVERRIDE;
36  virtual WriteResult Remove(const std::string& key) OVERRIDE;
37  virtual WriteResult Remove(const std::vector<std::string>& keys) OVERRIDE;
38  virtual WriteResult Clear() OVERRIDE;
39  virtual bool Restore() OVERRIDE;
40  virtual bool RestoreKey(const std::string& key) OVERRIDE;
41
42 private:
43  // The delegate storage area, NOT OWNED.
44  ValueStore* const delegate_;
45
46  DISALLOW_COPY_AND_ASSIGN(WeakUnlimitedSettingsStorage);
47};
48
49}  // namespace extensions
50
51#endif  // EXTENSIONS_BROWSER_API_STORAGE_WEAK_UNLIMITED_SETTINGS_STORAGE_H_
52