1// Copyright (c) 2012 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 BASE_PREFS_VALUE_MAP_PREF_STORE_H_
6#define BASE_PREFS_VALUE_MAP_PREF_STORE_H_
7
8#include <map>
9#include <string>
10
11#include "base/basictypes.h"
12#include "base/observer_list.h"
13#include "base/prefs/base_prefs_export.h"
14#include "base/prefs/pref_value_map.h"
15#include "base/prefs/writeable_pref_store.h"
16
17// A basic PrefStore implementation that uses a simple name-value map for
18// storing the preference values.
19class BASE_PREFS_EXPORT ValueMapPrefStore : public WriteablePrefStore {
20 public:
21  ValueMapPrefStore();
22
23  // PrefStore overrides:
24  virtual bool GetValue(const std::string& key,
25                        const base::Value** value) const OVERRIDE;
26  virtual void AddObserver(PrefStore::Observer* observer) OVERRIDE;
27  virtual void RemoveObserver(PrefStore::Observer* observer) OVERRIDE;
28  virtual bool HasObservers() const OVERRIDE;
29
30  // WriteablePrefStore overrides:
31  virtual void SetValue(const std::string& key, base::Value* value) OVERRIDE;
32  virtual void RemoveValue(const std::string& key) OVERRIDE;
33  virtual bool GetMutableValue(const std::string& key,
34                               base::Value** value) OVERRIDE;
35  virtual void ReportValueChanged(const std::string& key) OVERRIDE;
36
37 protected:
38  virtual ~ValueMapPrefStore();
39
40  // Notify observers about the initialization completed event.
41  void NotifyInitializationCompleted();
42
43 private:
44  PrefValueMap prefs_;
45
46  ObserverList<PrefStore::Observer, true> observers_;
47
48  DISALLOW_COPY_AND_ASSIGN(ValueMapPrefStore);
49};
50
51#endif  // BASE_PREFS_VALUE_MAP_PREF_STORE_H_
52