Split up chrome/browser/policy subdirectory

chrome/browser/policy/resource_cache.h

-// Copyright (c) 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_RESOURCE_CACHE_H_
-#define CHROME_BROWSER_POLICY_RESOURCE_CACHE_H_
-
-#include <map>
-#include <set>
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/threading/non_thread_safe.h"
-
-namespace base {
-class FilePath;
-}
-
-namespace leveldb {
-class DB;
-}
-
-namespace policy {
-
-// Manages storage of data at a given path. The data is keyed by a key and
-// a subkey, and can be queried by (key, subkey) or (key) lookups.
-// The contents of the cache have to be manually cleared using Delete() or
-// PurgeOtherSubkeys().
-// Instances of this class can be created on any thread, but from then on must
-// be always used from the same thread, and it must support file I/O.
-class ResourceCache : public base::NonThreadSafe {
- public:
-  explicit ResourceCache(const base::FilePath& cache_path);
-  ~ResourceCache();
-
-  // Returns true if the underlying database was opened, and false otherwise.
-  // When this returns false then all the other operations will fail.
-  bool IsOpen() const { return db_; }
-
-  // Stores |data| under (key, subkey). Returns true if the store suceeded, and
-  // false otherwise.
-  bool Store(const std::string& key,
-             const std::string& subkey,
-             const std::string& data);
-
-  // Loads the contents of (key, subkey) into |data| and returns true. Returns
-  // false if (key, subkey) isn't found or if there is a problem reading the
-  // data.
-  bool Load(const std::string& key,
-            const std::string& subkey,
-            std::string* data);
-
-  // Loads all the subkeys of |key| into |contents|.
-  void LoadAllSubkeys(const std::string& key,
-                      std::map<std::string, std::string>* contents);
-
-  // Deletes (key, subkey).
-  void Delete(const std::string& key, const std::string& subkey);
-
-  // Deletes all the subkeys of |key| not in |subkeys_to_keep|.
-  void PurgeOtherSubkeys(const std::string& key,
-                         const std::set<std::string>& subkeys_to_keep);
-
- private:
-  std::string GetStringWithPrefix(const std::string& s);
-  std::string CreatePathPrefix(const std::string& key);
-  std::string CreatePath(const std::string& key, const std::string& subkey);
-  std::string GetSubkey(const std::string& path);
-
-  scoped_ptr<leveldb::DB> db_;
-
-  DISALLOW_COPY_AND_ASSIGN(ResourceCache);
-};
-
-}  // namespace policy
-
-#endif  // CHROME_BROWSER_POLICY_RESOURCE_CACHE_H_