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// Copyright 2013 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_POLICY_REGISTRY_DICT_WIN_H_
#define CHROME_BROWSER_POLICY_REGISTRY_DICT_WIN_H_
#include <windows.h>
#include <map>
#include <string>
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "base/strings/string16.h"
namespace base {
class DictionaryValue;
class Value;
}
namespace policy {
// A case-insensitive string comparison functor.
struct CaseInsensitiveStringCompare {
bool operator()(const std::string& a, const std::string& b) const;
};
// In-memory representation of a registry subtree. Using a
// base::DictionaryValue directly seems tempting, but that doesn't handle the
// registry's case-insensitive-but-case-preserving semantics properly.
class RegistryDict {
public:
typedef std::map<std::string, RegistryDict*,
CaseInsensitiveStringCompare> KeyMap;
typedef std::map<std::string, base::Value*,
CaseInsensitiveStringCompare> ValueMap;
RegistryDict();
~RegistryDict();
// Returns a pointer to an existing key, NULL if not present.
RegistryDict* GetKey(const std::string& name);
const RegistryDict* GetKey(const std::string& name) const;
// Sets a key. If |dict| is NULL, clears that key.
void SetKey(const std::string& name, scoped_ptr<RegistryDict> dict);
// Removes a key. If the key doesn't exist, NULL is returned.
scoped_ptr<RegistryDict> RemoveKey(const std::string& name);
// Clears all keys.
void ClearKeys();
// Returns a pointer to a value, NULL if not present.
base::Value* GetValue(const std::string& name);
const base::Value* GetValue(const std::string& name) const;
// Sets a value. If |value| is NULL, removes the value.
void SetValue(const std::string& name, scoped_ptr<base::Value> value);
// Removes a value. If the value doesn't exist, NULL is returned.
scoped_ptr<base::Value> RemoveValue(const std::string& name);
// Clears all values.
void ClearValues();
// Merge keys and values from |other|, giving precedence to |other|.
void Merge(const RegistryDict& other);
// Swap with |other|.
void Swap(RegistryDict* other);
// Read a Windows registry subtree into this registry dictionary object.
void ReadRegistry(HKEY hive, const string16& root);
// Converts the dictionary to base::Value representation. For key/value name
// collisions, the key wins. |schema| supplies an optional JSON schema that
// will be used to map types to base::Value types. The returned object is
// either a base::DictionaryValue or a base::ListValue.
scoped_ptr<base::Value> ConvertToJSON(
const base::DictionaryValue* schema) const;
const KeyMap& keys() const { return keys_; }
const ValueMap& values() const { return values_; }
private:
KeyMap keys_;
ValueMap values_;
DISALLOW_COPY_AND_ASSIGN(RegistryDict);
};
} // namespace policy
#endif // CHROME_BROWSER_POLICY_REGISTRY_DICT_WIN_H_
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