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// Copyright (c) 2010 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 CHROME_BROWSER_PREFS_PREF_VALUE_MAP_H_
#define CHROME_BROWSER_PREFS_PREF_VALUE_MAP_H_
#pragma once
#include <map>
#include <string>
#include "base/basictypes.h"
class Value;
// A generic string to value map used by the PrefStore implementations.
class PrefValueMap {
public:
PrefValueMap() {}
virtual ~PrefValueMap();
// Gets the value for |key| and stores it in |value|. Ownership remains with
// the map. Returns true if a value is present. If not, |value| is not
// touched.
bool GetValue(const std::string& key, Value** value) const;
// Sets a new |value| for |key|. Takes ownership of |value|, which must be
// non-NULL. Returns true if the value changed.
bool SetValue(const std::string& key, Value* value);
// Removes the value for |key| from the map. Returns true if a value was
// removed.
bool RemoveValue(const std::string& key);
// Clears the map.
void Clear();
private:
typedef std::map<std::string, Value*> Map;
Map prefs_;
DISALLOW_COPY_AND_ASSIGN(PrefValueMap);
};
#endif // CHROME_BROWSER_PREFS_PREF_VALUE_MAP_H_
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