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[chromium-blink-merge.git] / base / prefs / value_map_pref_store.h
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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.
5 #ifndef BASE_PREFS_VALUE_MAP_PREF_STORE_H_
6 #define BASE_PREFS_VALUE_MAP_PREF_STORE_H_
8 #include <map>
9 #include <string>
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"
17 // A basic PrefStore implementation that uses a simple name-value map for
18 // storing the preference values.
19 class BASE_PREFS_EXPORT ValueMapPrefStore : public WriteablePrefStore {
20 public:
21 ValueMapPrefStore();
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;
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 virtual void SetValueSilently(const std::string& key,
37 base::Value* value) OVERRIDE;
39 protected:
40 virtual ~ValueMapPrefStore();
42 // Notify observers about the initialization completed event.
43 void NotifyInitializationCompleted();
45 private:
46 PrefValueMap prefs_;
48 ObserverList<PrefStore::Observer, true> observers_;
50 DISALLOW_COPY_AND_ASSIGN(ValueMapPrefStore);
53 #endif // BASE_PREFS_VALUE_MAP_PREF_STORE_H_