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_store.h" 15 #include "base/prefs/pref_value_map.h" 16 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 PrefStore { 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 protected: 31 virtual ~ValueMapPrefStore(); 32 33 // Store a |value| for |key| in the store. Also generates an notification if 34 // the value changed. Assumes ownership of |value|, which must be non-NULL. 35 void SetValue(const std::string& key, base::Value* value); 36 37 // Remove the value for |key| from the store. Sends a notification if there 38 // was a value to be removed. 39 void RemoveValue(const std::string& key); 40 41 // Notify observers about the initialization completed event. 42 void NotifyInitializationCompleted(); 43 44 private: 45 PrefValueMap prefs_; 46 47 ObserverList<PrefStore::Observer, true> observers_; 48 49 DISALLOW_COPY_AND_ASSIGN(ValueMapPrefStore); 50 }; 51 52 #endif // BASE_PREFS_VALUE_MAP_PREF_STORE_H_ 53
