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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_PREFS_VALUE_MAP_PREF_STORE_H_
#define BASE_PREFS_VALUE_MAP_PREF_STORE_H_
#include <map>
#include <string>
#include "base/basictypes.h"
#include "base/observer_list.h"
#include "base/prefs/base_prefs_export.h"
#include "base/prefs/pref_store.h"
#include "base/prefs/pref_value_map.h"
// A basic PrefStore implementation that uses a simple name-value map for
// storing the preference values.
class BASE_PREFS_EXPORT ValueMapPrefStore : public PrefStore {
public:
ValueMapPrefStore();
// PrefStore overrides:
virtual bool GetValue(const std::string& key,
const base::Value** value) const OVERRIDE;
virtual void AddObserver(PrefStore::Observer* observer) OVERRIDE;
virtual void RemoveObserver(PrefStore::Observer* observer) OVERRIDE;
virtual bool HasObservers() const OVERRIDE;
protected:
virtual ~ValueMapPrefStore();
// Store a |value| for |key| in the store. Also generates an notification if
// the value changed. Assumes ownership of |value|, which must be non-NULL.
void SetValue(const std::string& key, base::Value* value);
// Remove the value for |key| from the store. Sends a notification if there
// was a value to be removed.
void RemoveValue(const std::string& key);
// Notify observers about the initialization completed event.
void NotifyInitializationCompleted();
private:
PrefValueMap prefs_;
ObserverList<PrefStore::Observer, true> observers_;
DISALLOW_COPY_AND_ASSIGN(ValueMapPrefStore);
};
#endif // BASE_PREFS_VALUE_MAP_PREF_STORE_H_
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