extensions/browser/api/storage/weak_unlimited_settings_storage.h

   1 // Copyright 2014 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 EXTENSIONS_BROWSER_API_STORAGE_WEAK_UNLIMITED_SETTINGS_STORAGE_H_
   6 #define EXTENSIONS_BROWSER_API_STORAGE_WEAK_UNLIMITED_SETTINGS_STORAGE_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "extensions/browser/value_store/value_store.h"
  10
  11 namespace extensions {
  12
  13 // A ValueStore decorator which makes calls through |Set| ignore quota.
  14 // "Weak" because ownership of the delegate isn't taken; this is designed to be
  15 // temporarily attached to storage areas.
  16 class WeakUnlimitedSettingsStorage : public ValueStore {
  17  public:
  18   // Ownership of |delegate| NOT taken.
  19   explicit WeakUnlimitedSettingsStorage(ValueStore* delegate);
  20
  21   virtual ~WeakUnlimitedSettingsStorage();
  22
  23   // ValueStore implementation.
  24   virtual size_t GetBytesInUse(const std::string& key) OVERRIDE;
  25   virtual size_t GetBytesInUse(const std::vector<std::string>& keys) OVERRIDE;
  26   virtual size_t GetBytesInUse() OVERRIDE;
  27   virtual ReadResult Get(const std::string& key) OVERRIDE;
  28   virtual ReadResult Get(const std::vector<std::string>& keys) OVERRIDE;
  29   virtual ReadResult Get() OVERRIDE;
  30   virtual WriteResult Set(
  31       WriteOptions options,
  32       const std::string& key,
  33       const base::Value& value) OVERRIDE;
  34   virtual WriteResult Set(
  35       WriteOptions options, const base::DictionaryValue& values) OVERRIDE;
  36   virtual WriteResult Remove(const std::string& key) OVERRIDE;
  37   virtual WriteResult Remove(const std::vector<std::string>& keys) OVERRIDE;
  38   virtual WriteResult Clear() OVERRIDE;
  39   virtual bool Restore() OVERRIDE;
  40   virtual bool RestoreKey(const std::string& key) OVERRIDE;
  41
  42  private:
  43   // The delegate storage area, NOT OWNED.
  44   ValueStore* const delegate_;
  45
  46   DISALLOW_COPY_AND_ASSIGN(WeakUnlimitedSettingsStorage);
  47 };
  48
  49 }  // namespace extensions
  50
  51 #endif  // EXTENSIONS_BROWSER_API_STORAGE_WEAK_UNLIMITED_SETTINGS_STORAGE_H_