1// Copyright (c) 2013 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 ANDROID_WEBVIEW_BROWSER_AW_PREF_STORE_H_
6#define ANDROID_WEBVIEW_BROWSER_AW_PREF_STORE_H_
7
8#include <string>
9
10#include "base/basictypes.h"
11#include "base/compiler_specific.h"
12#include "base/observer_list.h"
13#include "base/prefs/persistent_pref_store.h"
14#include "base/prefs/pref_value_map.h"
15
16// A light-weight prefstore implementation that keeps preferences
17// in a memory backed store. This is not a persistent prefstore -- we
18// subclass the PersistentPrefStore here since it is needed by the
19// PrefService, which in turn is needed by the Autofill component.
20class AwPrefStore : public PersistentPrefStore {
21 public:
22  AwPrefStore();
23
24  // Overriden from PrefStore.
25  virtual bool GetValue(const std::string& key,
26                        const base::Value** result) const OVERRIDE;
27  virtual void AddObserver(PrefStore::Observer* observer) OVERRIDE;
28  virtual void RemoveObserver(PrefStore::Observer* observer) OVERRIDE;
29  virtual bool HasObservers() const OVERRIDE;
30  virtual bool IsInitializationComplete() const OVERRIDE;
31
32  // PersistentPrefStore overrides:
33  virtual bool GetMutableValue(const std::string& key,
34                               base::Value** result) OVERRIDE;
35  virtual void ReportValueChanged(const std::string& key) OVERRIDE;
36  virtual void SetValue(const std::string& key, base::Value* value) OVERRIDE;
37  virtual void SetValueSilently(const std::string& key,
38                                base::Value* value) OVERRIDE;
39  virtual void RemoveValue(const std::string& key) OVERRIDE;
40  virtual bool ReadOnly() const OVERRIDE;
41  virtual PrefReadError GetReadError() const OVERRIDE;
42  virtual PersistentPrefStore::PrefReadError ReadPrefs() OVERRIDE;
43  virtual void ReadPrefsAsync(ReadErrorDelegate* error_delegate) OVERRIDE;
44  virtual void CommitPendingWrite() OVERRIDE {}
45
46 protected:
47  virtual ~AwPrefStore();
48
49 private:
50  // Stores the preference values.
51  PrefValueMap prefs_;
52
53  ObserverList<PrefStore::Observer, true> observers_;
54
55  DISALLOW_COPY_AND_ASSIGN(AwPrefStore);
56};
57
58#endif  // ANDROID_WEBVIEW_BROWSER_AW_PREF_STORE_H_
59